WO2023108916A1 - Stator assembly, motor, and electrical equipment - Google Patents

Abstract

The present application provides a stator assembly, a motor, and an electrical equipment. The motor comprises: a stator assembly comprising a stator core and a stator winding, wherein the stator core comprises: a stator yoke portion; stator main teeth provided on the stator yoke portion and comprising tooth shoes, the stator winding being disposed on the stator main teeth; and at least two stator auxiliary teeth provided on the tooth shoes; and a rotor assembly comprising a plurality of permanent magnet poles, the adjacent permanent magnet poles having different polarities. The number Ps of pole pairs of the stator winding satisfies that Ps=|ax±Pr|, wherein a represents the number of the stator main teeth, x represents the number of the stator auxiliary teeth on each stator main tooth, and Pr represents the number of the pole pairs of the plurality of permanent magnet poles. In the motor provided by the present application, the stator auxiliary teeth can serve as modulation components, and new harmonic components appearing in the air gap flux density can serve as working harmonics of the motor to provide an output torque for the motor, thereby effectively increasing the torque density of the motor.

Description

Stator assemblies, motors and electrical equipment

This application claims the priority of the Chinese patent application with the application number "202111552362.8" and the title of the invention "Motor and Electrical Equipment" filed with the State Intellectual Property Office of China on December 17, 2021; filed on December 17, 2021 Priority of a Chinese patent application to the State Intellectual Property Office of China with the application number "202123183409.6" and the title of the invention "Motor and Electrical Equipment"; filed with the State Intellectual Property Office of China on December 17, 2021 with the application number " 202111552333.1", the priority of the Chinese patent application titled "Stator Assembly, Motor and Electrical Equipment"; it was submitted to the State Intellectual Property Office of China on December 17, 2021, with the application number "202123185227.2" and the title of the invention "Stator Components, motors and electrical equipment" Chinese patent application priority; submitted to the State Intellectual Property Office of China on December 17, 2021 with the application number "202111550877.4" and the title of the invention as "stator components, motors and electrical equipment" Priority of a Chinese patent application; priority of a Chinese patent application filed with the State Intellectual Property Office of China on December 17, 2021, with application number "202123185140.5" and title of invention "Stator assembly, motor and electrical equipment"; its The entire contents are incorporated by reference in this application.

technical field

The present application relates to the technical field of motors, in particular, to a stator assembly, a motor and electrical equipment.

Background technique

Permanent-magnet brushless DC motors mostly use surface-mounted rotor assemblies. In surface-mounted rotor assemblies, the electromagnetic air gap is relatively large, and the air-gap flux density is relatively low. It is difficult to further improve the output capacity of the motor.

In related technologies, a built-in rotor assembly is used to increase the strength of the fundamental air-gap magnetic field, thereby improving the efficiency of the motor. However, to further increase the fundamental magnetic field strength in this structure will often increase the cost of the motor or deteriorate the vibration and noise performance of the motor, thereby affecting the reliability of the motor; moreover, the degree of improvement of the fundamental magnetic field strength is limited, and the room for improving the performance of the motor is also small .

In the related art, during the operation of the motor, there are few working harmonics generated between the stator assembly and the rotor assembly, and the increase of the output torque of the motor is limited.

In the related art, the motor uses a built-in rotor assembly to increase the fundamental air-gap magnetic field strength, so as to improve the efficiency of the motor. However, to further increase the fundamental magnetic field strength in this structure will often increase the cost of the motor or deteriorate the vibration and noise performance of the motor, thus affecting the reliability of the motor; moreover, the degree of improvement of the fundamental magnetic field strength is limited, and the room for motor performance improvement is also small.

Contents of the invention

This application aims to solve at least one of the technical problems existing in the prior art or related art.

To this end, the first aspect of the present application provides a motor.

The second aspect of the present application provides an electrical device.

The third aspect of the present application provides a stator assembly.

A fourth aspect of the present application provides a motor.

A fifth aspect of the present application provides an electrical device.

The sixth aspect of the present application provides a stator assembly.

The seventh aspect of the present application provides a motor.

The eighth aspect of the present application provides an electrical device.

The first aspect of the present application provides a motor, including: a stator assembly, the stator assembly includes a stator core and a stator winding, the stator core includes: a stator yoke; the stator main teeth are arranged on the stator yoke, and the stator main teeth include The tooth shoe, the stator winding is arranged on the stator main tooth; at least two stator auxiliary teeth are arranged on the tooth shoe; the rotor assembly, the rotor assembly includes a plurality of permanent magnet poles, and the polarities of adjacent permanent magnet poles are different; wherein, The number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│, a represents the number of stator main teeth, x represents the number of stator auxiliary teeth on each stator main tooth, and Pr represents the number of pole pairs of multiple permanent magnet poles .

The electric machine proposed in this application includes a stator assembly and a rotor assembly. Wherein, the stator assembly includes a stator core and a stator winding, and the rotor assembly includes a plurality of permanent magnet poles, and the polarities of adjacent permanent magnet poles are different. During the operation of the motor, the rotor assembly can cooperate with the stator assembly and output torque.

Further, the stator core includes a stator yoke, stator main teeth and at least two stator auxiliary teeth. Wherein, the stator main teeth are arranged on the stator yoke, and the dedendums of the stator main teeth are connected with the stator yoke, and the tooth tops of the stator main teeth are provided with tooth shoes. In addition, the stator winding is arranged on the main teeth of the stator, and the tooth shoe can limit the stator winding to a certain extent, so as to ensure that the stator winding is stably positioned on the main teeth of the stator.

Furthermore, at least two auxiliary stator teeth are provided on the tooth shoe, and the auxiliary stator teeth can not only serve as magnetically conductive components, but also serve as modulating components to realize the function of magnetic field modulation. At this time, it is different from the conventional permanent magnet motor (slot opening is small, and the air gap permeance is close to constant) used in the related art. In the motor proposed in the present application, the stator main teeth are split into at least two stator auxiliary teeth, so that more harmonic components are introduced into the air gap permeance. In this way, the performance of the motor is significantly improved. Moreover, the motor has a simple structure, is convenient for processing and manufacturing, does not significantly increase the cost of the motor, and the motor does not generate large vibration and noise.

Furthermore, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│. Among them, a represents the number of stator main teeth, x represents the number of stator auxiliary teeth on each stator main tooth, and Pr represents the number of pole pairs of multiple permanent magnet poles. The new harmonic components appearing in the air-gap magnetic density can be used as the working harmonics of the motor to provide output torque for the motor, thereby effectively improving the torque density of the motor.

Therefore, in the motor proposed in this application, at least two auxiliary stator teeth are arranged on the tooth shoes of the main teeth of the stator, and the auxiliary teeth of the stator are used as modulation components to realize the function of magnetic field modulation, so that more Harmonic components, so that the performance of the motor has been significantly improved. Furthermore, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│. Under this limitation, the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.

In some possible designs, at least two stator auxiliary teeth are distributed at intervals on the stator yoke, and grooves are provided between adjacent two stator auxiliary teeth.

In this design, at least two stator auxiliary teeth are distributed at intervals on the stator yoke, and there is a groove between two adjacent stator auxiliary teeth. In addition, in the motor proposed in the present application, the size of the groove between two adjacent stator auxiliary teeth in the circumferential direction of the stator assembly is larger than that of the permanent magnet motor used in the related art. That is to say, the size of the groove between two adjacent stator auxiliary teeth in the motor proposed by this application is larger, so that more harmonic components are introduced into the air gap permeance, so that when the permanent magnet magnetomotive force and harmonic When the air-gap permeance of the wave acts, a new harmonic component will appear in the air-gap flux density.

Further, on the basis of the new harmonic components appearing in the air-gap flux density, this application further optimizes the number of pole pairs Ps of the stator winding, so that the new harmonic components appearing in the air-gap flux density can be used as motor The working harmonics provide the output torque for the motor, thus effectively improving the torque density of the motor.

In some possible designs, there is a stator slot between two adjacent main teeth of the stator, and the stator winding is located in the stator slot; there is a notch between two adjacent tooth shoes, and the notch communicates with the stator slot; wherein, the stator The windings consist of a plurality of coils, each wound on a stator main tooth.

In this design, there are stator slots between two adjacent stator main teeth, and the stator windings are wound on the stator main teeth and received in the stator slots. In addition, a notch is formed between the tooth shoes of two adjacent stator main teeth, and the notch communicates with the stator slot, and a worker can wind the stator winding on the stator main tooth through the notch.

Furthermore, in the motor proposed in this application, the stator winding includes a plurality of coils, and each coil is only wound on one main tooth of the stator, that is, a single-tooth-wound concentrated winding structure is adopted. At this time, the end of the motor winding is small, and there are It is beneficial to reduce copper consumption, facilitates modularization, and improves manufacturing efficiency.

In some possible designs, the size of the notch is different from the size of the groove.

In this design, the size of the notch is unequal to the size of the groove in the circumferential direction of the stator assembly. Specifically, in the circumferential direction of the stator assembly, the size of the groove is larger than the size of the notch. In this way, the uniformity of the distribution of the stator auxiliary teeth on the circumference will be changed, that is, the number of cycles of the air gap permeance will be reduced, and the number of pole pairs for each working harmonic of the air gap flux density is: |Pr±i×Zf|( i=0, 1, 2...), Zf is the number of air-gap permeance periods; when the air-gap permeance period decreases, the magnetic density harmonic components generated by modulation will increase, that is, more working harmonics will be generated. Wave, so that the output torque of the motor will be further increased.

In some possible designs, the groove is a polygonal groove or an arc groove.

In this design, the shape of the groove can be designed according to the actual situation. Specifically, the groove can be designed as a polygonal groove, an arc groove, and the like. More specifically, the grooves can be designed as square grooves, trapezoidal grooves, triangular grooves, or other polygonal grooves.

In some possible designs, the distance from the tooth body bisector of the stator main tooth to the two side walls of the groove is equal or different.

In this design, the distance from the tooth body bisector of the stator main tooth to the two side walls of the groove is equal. In this way, in the circumferential direction of the stator assembly, the groove is located in the middle of the tooth shoe. Such a design can simplify the overall structure of the main teeth of the stator, and facilitate the processing and manufacture of the main teeth of the stator, thereby improving the processing efficiency of the stator assembly and the entire motor.

In this design, the distance from the tooth body bisector of the stator main tooth to the two side walls of the groove is not equal. In this way, in the circumferential direction of the stator assembly, the groove is offset towards one end of the tooth shoe. Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, when the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two stator auxiliary teeth lead to the introduction of more harmonic components into the air gap permeance, so that the performance of the motor is significantly improved.

In some possible designs, among two adjacent stator main teeth, there is a notch between the stator auxiliary teeth of one stator main tooth and the stator auxiliary teeth of the other stator main tooth; The distance from the angle bisector of the stator main tooth to two adjacent stator auxiliary teeth is equal or different.

In this design, there are at least two stator set teeth at the ends of the tooth shoe. Moreover, among two adjacent stator main teeth, there is a notch between the stator auxiliary teeth of one stator main tooth and the stator auxiliary teeth of the other stator main tooth.

In this design, at the notch, the distance from the angle bisector of two adjacent stator main teeth to two adjacent stator auxiliary teeth is equal. In this way, the notch is located in the middle of two adjacent stator auxiliary teeth. Such a design can simplify the overall structure of the main teeth of the stator, and facilitate the processing and manufacture of the main teeth of the stator, thereby improving the processing efficiency of the stator assembly and the entire motor.

In this design, at the notch, the distance from the angle bisector of two adjacent stator main teeth to two adjacent stator auxiliary teeth is not equal. In this way, the notches are located adjacent to each other and offset in the direction towards a stator auxiliary tooth, forming an offset arrangement of the notches. Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, more harmonic components are introduced into the air-gap flux density; and, when the permanent magnet magnetomotive force interacts with the air-gap flux density containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two stator auxiliary teeth lead to the introduction of more harmonic components into the air gap permeance, so that the performance of the motor is significantly improved.

In some possible designs, among two adjacent stator auxiliary teeth, the angle β formed between the tooth body bisector of one stator auxiliary tooth and the tooth body bisector of the other stator auxiliary tooth satisfies 1≤β/( 2π/(ax))<1.4, wherein, a represents the number of stator main teeth, and x represents the number of stator auxiliary teeth on each stator main tooth.

In this design, among two adjacent stator auxiliary teeth, the angle β formed between the tooth body bisector of one stator auxiliary tooth and the tooth body bisector of the other stator auxiliary tooth satisfies 1≤β/( 2π/(ax))<1.4; wherein, a represents the number of stator main teeth, and x represents the number of stator auxiliary teeth on each stator main tooth. In this way, the present application further optimizes the structure and distribution of the auxiliary teeth of the stator, so that the amplitude of the harmonics generated by the modulation of the motor is relatively large, and the torque is relatively high, so as to further improve the working efficiency of the motor.

In some possible designs, the stator assembly includes at least two stacked bodies, any stacked body includes a yoke section and a stator main tooth, the stator main tooth is arranged on the yoke section, and the yokes of the adjacent two stacked bodies The segments are connected, and the stator yoke includes a plurality of yoke segments.

In this design, the stator assembly includes at least two stacks, and the stator assembly is manufactured by stacking the at least two stacks. In this way, during the manufacturing process of the stator assembly, workers can first perform operations such as winding on a single stacked body. Compared with the related art that needs to carry out the winding operation on the integral iron core, the operation space of the stacked body proposed by the present application is larger, which is beneficial to reduce the difficulty of winding, thereby improving the working efficiency of winding and reducing the cost of materials.

In addition, the present application can first perform operations such as winding on a single stacked body, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the applied motor. Moreover, on the basis of reducing the difficulty of winding, the present application can reduce the scrap rate in the winding process, thereby reducing scrap and improving the cost rate of the stator assembly. In addition, the individual stacked body has lower requirements on materials, which can increase the utilization rate of iron core materials, thereby reducing the material cost of the stator assembly.

In some possible designs, the yoke sections of two adjacent stacks are detachably connected.

In this design, the yoke sections of two adjacent stacked bodies are detachably connected, thereby ensuring the disassembly and assembly of the two adjacent stacked bodies.

Specifically, the stator assembly further includes a first connecting portion and a second connecting portion. Wherein, the first connection part is arranged at the first end of the yoke section, the second connection part is arranged at the second end of the yoke section, and the first end and the second end are oppositely arranged on the yoke section. Moreover, the structures of the first connecting part and the second connecting part match, and the cooperation between the first connecting part and the second connecting part can realize self-locking. Therefore, in the process of splicing stacked bodies, the present application can connect two adjacent stacked bodies through the first connecting part and the second connecting part, including the detachable connection of two adjacent stacked bodies.

In this design, one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion. In addition, the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function. Specifically, the recesses include, but are not limited to, the following structures: polygonal grooves, circular grooves, and elliptical grooves; the shape of the convex portion matches the shape of the concave portion.

In some possible designs, the stator assembly further includes a fixing piece, and two adjacent stacked bodies are fixed by the fixing piece.

In this design, the stator assembly also includes a fixing. in. After the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure through a fixing member, thereby further improving the structural stability of the spliced stacked bodies. Specifically, the fixing member can use an insulating frame, so that the insulating frame can also fix the stacked body on the basis of ensuring insulation, thereby realizing the multi-purpose of the insulating frame.

In some possible designs, two adjacent stacks are connected by welding.

In this design, two adjacent stacks are welded together. in. After the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of welding, thereby further improving the structural stability of the spliced stacked bodies.

In some possible designs, two adjacent stacked bodies are integrally injected.

In this design, two adjacent stacked bodies are integrally injection molded. That is, after the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of integral injection molding, thereby further improving the structural stability of the spliced stacked bodies.

In some possible designs, the body of the main tooth of the stator main tooth is detachably connected to the stator yoke.

In this design, the main tooth body of the stator main tooth is detachably connected to the stator yoke. In this way, during the manufacturing process of the stator assembly, the wire can be wound on a single stack containing the main teeth of the stator first, and then installed on the stator yoke. The circumferential width of the tooth shoe can be increased, and the width of the notch can be reduced, so as to avoid the influence of the too large notch on the performance of the motor.

In some possible designs, the tooth shoe is detachably connected to the body of the main tooth of the stator main tooth.

In this design, the tooth shoe is detachably connected to the main tooth body of the stator main tooth. In this way, during the manufacturing process of the stator assembly, the wire can be wound on the single stacked body containing the main teeth of the stator first, and then the tooth shoe can be installed. The circumferential width of the tooth shoe reduces the width of the notch, so as to avoid the influence of the too large notch on the performance of the motor.

In some possible designs, at least a portion of the stator assembly is located inside the rotor assembly.

In this design, at least a portion of the stator assembly is located inside the rotor assembly. That is, the present application proposes that the motor is a radial motor, the stator assembly is an inner stator, and the rotor assembly is an outer rotor.

In some possible designs, at least a portion of the rotor assembly is located inside the stator assembly.

In this design, at least a portion of the rotor assembly is located inside the stator assembly. That is, the present application proposes that the motor is a radial motor, the stator assembly is an outer stator, and the rotor assembly is an inner rotor.

In some possible designs, the rotor assembly further includes: a rotor core; permanent magnets disposed on the rotor core, and the permanent magnets form a plurality of permanent magnetic poles.

In this design, the rotor assembly also includes the rotor core and permanent magnets. Wherein, the permanent magnet is arranged on the rotor core, and a plurality of permanent magnet poles are formed by the permanent magnet.

Specifically, when at least a part of the rotor assembly is located inside the stator assembly, the permanent magnets can be placed on the outer surface of the rotor core, or placed inside the rotor core, such as V-shaped, spoke-shaped, etc.

Specifically, when at least a portion of the stator assembly is inside the rotor assembly, the permanent magnets are retained on the inner surface of the rotor core. The permanent magnet pole can be composed of a plurality of permanent magnets with two lateral edges and the inner and outer surfaces are roughly arc-shaped, and can also be an integrally formed magnetic ring. Optionally, the permanent magnet material can be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

In some possible designs, the permanent magnet includes a plurality of arc-shaped permanent magnets, the plurality of arc-shaped permanent magnets are distributed in a circular shape, and the polarities of two adjacent arc-shaped permanent magnets are different.

In this design, the permanent magnets consist of multiple arc-shaped permanent magnets. Wherein, a plurality of arc-shaped permanent magnets are distributed in a circular shape, and the polarities of two adjacent arc-shaped permanent magnets are different. Specifically, the number of magnetic poles of each arc-shaped permanent magnet is 1, 2 or 4, and the polarities of adjacent magnetic poles are alternately different.

In some possible designs, the permanent magnets comprise integral annular permanent magnets.

In this design, the permanent magnets consist of integral ring-shaped permanent magnets. At this time, when the ring-shaped permanent magnet has multiple magnetic poles, the number of permanent magnets can be reduced, the process time for installing the permanent magnets can be reduced, and the manufacturing and assembly efficiency can be improved. Moreover, when the width of the magnetic poles is small, the way of filling multiple poles with one annular permanent magnet can increase the width of the annular permanent magnet and reduce the processing difficulty of the annular permanent magnet.

In some possible designs, the permanent magnet includes a plurality of arc-shaped permanent magnets, and the number of magnetic poles of the arc-shaped permanent magnets is 2 or 4.

In this design, the permanent magnet can be an arc-shaped permanent magnet, and the number of magnetic poles of the arc-shaped permanent magnet is 2 or 4.

In some possible designs, in the circumferential direction of the stator assembly, there are at least two stator auxiliary teeth with unequal sizes.

In this design, in the circumferential direction of the stator assembly, there are at least two stator auxiliary teeth with unequal sizes. In this way, the distribution of air gap permeance can be changed, and some harmonics can be weakened, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, more harmonic components are introduced into the air-gap flux density; and, when the permanent magnet magnetomotive force interacts with the air-gap flux density containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two stator auxiliary teeth lead to the introduction of more harmonic components into the air gap permeance, so that the performance of the motor is significantly improved.

The second aspect of the present application provides an electrical device, including the motor according to the first aspect of the present application.

The electrical equipment proposed in the present application includes the motor according to the first aspect of the present application. Therefore, it has all the beneficial effects of the above-mentioned motor, and will not be discussed in detail here.

The third aspect of the present application provides a stator assembly, including: a stator yoke; stator main teeth, the stator main teeth include a main tooth body and a tooth shoe, one end of the main tooth body is connected to the stator yoke, and the tooth shoe It is connected with the other end of the tooth body of the main tooth, and the end of the tooth shoe away from the tooth body of the main tooth is provided with at least two auxiliary stator teeth, and the end of any auxiliary stator tooth is provided with a spline surface; The distance between the first end to the second end of the tooth shoe, at least a portion of the spline surface to the center of the stator yoke gradually increases or decreases.

The stator assembly proposed in this application includes a stator yoke and stator main teeth arranged on the stator yoke, wherein the stator main teeth include a main tooth body and a tooth shoe, and one end of the main tooth body is connected to the stator yoke , the tooth shoe is connected with the other end of the main tooth body, so as to realize the connection between the stator main tooth and the stator yoke, and then the winding can be set on the stator main tooth to realize the cooperation with the magnetic field of the permanent magnet when energized , and then realize the rotation of the motor rotor.

Further, at least two auxiliary stator teeth are provided at the end of the tooth shoe away from the tooth body of the main tooth. Through the arrangement of at least two auxiliary stator teeth, on the one hand, at least two auxiliary stator teeth can be used as magnetically conductive components for magnetic conduction, On the one hand, the at least two auxiliary teeth of the stator can also be used as modulation components to realize the function of magnetic field modulation. More harmonic components are introduced into the air gap permeance, so that the performance of the motor is significantly improved.

Further, from the first end of the tooth shoe to the second end of the tooth shoe, the distance between at least a part of the spline surface and the center of the stator yoke gradually increases or decreases. In this way, the distribution of air gap permeance can be changed, so that the number of air gap permeance cycles decreases. When the number of air gap permeance cycles decreases, the harmonic components of magnetic density generated by modulation will increase, that is, more working harmonics will be generated. wave, the output torque of the motor will further increase.

In the stator assembly provided by the present application, at least two stator auxiliary teeth are arranged on the tooth shoe of the main tooth of the stator, and at least a part of the spline surface is connected to the stator yoke from the first end of the tooth shoe to the second end of the tooth shoe The distance between the centers of the sections is set to gradually increase or decrease. On the basis of realizing the formation of an uneven air gap between the stator assembly and the rotor to improve the waveform of the air gap magnetic field, reduce the cogging torque and torque ripple of the motor, and improve the reliability of the motor, the air gap can also be changed. The distribution of gap permeance reduces the number of air gap permeance periods, so that the harmonic components of flux density generated by modulation will increase, and more working harmonics will be generated to further increase the output torque of the motor.

According to the stator assembly provided by this application, it may also have the following additional technical features:

In the above technical solution, further, the spline surface includes: a main spline surface, arranged at one end of the tooth body of the main tooth; a sub-spline surface, connected to the main spline surface, from the first end of the tooth shoe to the tooth shoe At the second end, the distance between the sub-spline surface and the center of the stator yoke gradually increases or decreases.

In this technical solution, the spline surface may include a main spline surface and a sub-spline surface, wherein the main spline surface is arranged at one end of the main tooth body, the sub-spline surface is connected to the main spline surface, and, from The distance between the first end of the tooth shoe and the second end of the tooth shoe, the sub-spline surface and the center of the stator yoke gradually increases or decreases. Therefore, the distance between at least a part of the spline surface at the end of the stator pair of teeth and the center of the stator yoke gradually increases or decreases, thereby changing the distribution of the air gap permeance and reducing the number of air gap permeance periods , when the number of air-gap permeance cycles decreases, the flux density harmonic components generated by modulation will increase, that is, more working harmonics will be generated, and the output torque of the motor will be further improved.

In any of the above technical solutions, further, from the first end of the tooth shoe to the second end of the tooth shoe, the distance between the main spline surface and the center of the stator yoke is constant.

In this technical solution, the distance between the main spline surface and the center of the stator yoke remains constant, so as to cooperate with the setting of the sub-spline surface, so that when the stator assembly is connected with the rotor assembly, the stator assembly An uneven air gap can be formed between the stator auxiliary teeth and the rotor assembly, thereby improving the waveform of the air gap magnetic field, making the magnetic field formed by the permanent magnet in the air gap closer to sinusoidal, and reducing the cogging torque and rotational speed of the motor. Moment fluctuations.

In any of the above technical solutions, further, the sub-spline surface includes at least a spline plane; and/or the sub-spline surface includes at least a first spline surface; and/or the main spline surface includes a second spline surface.

In this technical solution, the sub-spline surface may include a spline plane, that is, the spline surface at the end of the stator auxiliary tooth includes at least a section of spline plane. By setting the sub-spline surface as a spline plane, it can be ensured that the The distance between the first end of the shoe and the second end of the tooth shoe, the sub-spline surface and the center of the stator yoke can gradually increase or decrease. Then change the distribution of air gap permeance, so that the number of air gap permeance cycles decreases. When the number of air gap permeance cycles decreases, the harmonic components of magnetic density generated by modulation will increase, that is, more working harmonics will be generated. , the output torque of the motor will further increase. Further, in conjunction with the setting of the main spline surface, when the stator assembly is connected with the rotor assembly, an uneven air gap can be formed between the stator auxiliary teeth of the stator assembly and the rotor assembly, thereby improving the waveform of the air gap magnetic field, so that the permanent magnet is in the The magnetic field formed in the air gap is more sinusoidal, which can reduce the cogging torque and torque ripple of the motor.

Further, the sub-spline surface may also include a first spline surface, that is, the spline surface at the end of the auxiliary tooth of the stator includes at least a segment of the first spline surface. By setting the extension direction of the first spline surface, it can also be realized that the distance between the sub-spline surface and the center of the stator yoke can gradually increase or decrease, so as to achieve the effect of increasing the output torque of the motor. And cooperate with the setting of the main spline surface to achieve the purpose of reducing the cogging torque and torque ripple of the motor.

Further, the main spline surface may include a second spline surface, specifically, viewed along the axial direction of the stator assembly, the extension direction of the second spline surface may be located on the concentric circle of the stator yoke, thereby ensuring that the second spline The distance between the curved surface and the center of the stator yoke is constant, that is, the distance between the main spline surface and the center of the stator yoke is constant. Furthermore, in conjunction with the setting of the sub-spline surface, when the stator assembly is connected with the rotor assembly, an uneven air gap can be formed between the stator auxiliary teeth of the stator assembly and the rotor assembly, thereby improving the waveform of the air-gap magnetic field, so that the permanent magnet in The magnetic field formed in the air gap is more sinusoidal, which can reduce the cogging torque and torque ripple of the motor.

Further, the main spline surface includes a second spline surface, and at the same time, the sub-spline surface includes both a spline plane and a first spline surface, wherein the second spline surface is set at one end of the main tooth body, The first spline surface is connected to the second spline surface, and the spline plane is connected to the first spline surface. Alternatively, the spline plane is connected to the second spline surface and the first spline surface is connected to the spline plane.

In any of the above technical solutions, further, the stator auxiliary teeth include first stator auxiliary teeth and second stator auxiliary teeth; the spline surface includes a first spline surface and a second spline surface, and the first spline surface is located at On the first auxiliary tooth of the stator, the second spline surface is located on the second auxiliary tooth of the stator; wherein, the first spline surface and the second spline surface are asymmetrical with respect to the bisector of the tooth body of the main tooth.

In this technical solution, the at least two auxiliary stator teeth include first auxiliary stator teeth and second auxiliary stator teeth. Wherein, in the circumferential direction of the stator assembly, the first stator auxiliary teeth and the second stator auxiliary teeth are located at opposite ends of the tooth shoes. In addition, both the first stator auxiliary teeth and the second stator auxiliary teeth can be used as magnetic field modulation components to improve the performance of the motor to which the stator assembly is applied.

Further, the spline surface includes a first spline surface and a second spline surface, wherein the first spline surface is located on the first stator auxiliary tooth, and the second spline surface is located on the second stator auxiliary tooth, and, The first spline surface and the second spline surface are asymmetric with respect to the center line of the main tooth body of the stator main tooth. Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, when the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two stator auxiliary teeth of the stator cause more harmonic components to be introduced into the air gap permeance, so that the performance of the motor is significantly improved.

In any of the above technical solutions, further, the number of stator main teeth is multiple, and the plurality of stator main teeth are distributed along the circumferential direction of the stator yoke; there is a stator slot between two adjacent main teeth, and adjacent There is a notch between the two tooth shoes, and the notch communicates with the stator slot.

In this technical solution, the number of stator main teeth can be set to be multiple, and the plurality of stator main teeth are distributed along the circumferential direction of the stator yoke, thereby ensuring the number of windings wound on the stator main teeth in the stator assembly, and then Ensure that the magnetic field generated by the permanent magnet can effectively cooperate with the winding during the operation of the motor to ensure the operating efficiency of the motor.

Specifically, there are stator slots between the main tooth bodies of two adjacent stator main teeth, so that when the winding is wound on the main tooth body of the stator main teeth, it can be accommodated in the stator slots, ensuring that the position of the stator slots is reasonable Sex, so as to ensure the number of windings, and thus ensure the operating efficiency of the motor.

Further, there is a notch between two adjacent tooth shoes, and the notch communicates with the stator slot. Through the setting of the notch, the starting torque of the motor can be reduced, the waveform of the air gap magnetic field can be improved, and additional loss can be reduced. And it is beneficial to adjust the harmonic amplitude of the air gap magnetic field and the eddy current density of the rotor, so as to ensure the stability of the motor during operation and reduce the eddy current loss. Specifically, the harmonic amplitude of the air gap magnetic field and the eddy current density of the rotor can be adjusted by setting the width of the notch to meet different operating requirements of the motor.

In any of the above technical solutions, further, there is a groove between two adjacent stator auxiliary teeth on the same stator main tooth; in the circumferential direction of the stator assembly, the size of the groove is different from the size of the notch.

In this technical solution, on the same stator main tooth, there is a groove between two adjacent stator auxiliary teeth, so that the adjacent two stator auxiliary teeth are spaced apart, and the gap between the stator main tooth and the rotor assembly is also ensured. The inhomogeneity of the air gap can improve the waveform of the air gap magnetic field, so that the magnetic field formed by the permanent magnet in the air gap is closer to the sinusoidal shape, so as to reduce the cogging torque and torque fluctuation of the motor and ensure the motor Stability during operation.

Further, in the circumferential direction of the stator assembly, the size of the groove between two adjacent stator auxiliary teeth and the size of the notch between the tooth shoes of two adjacent stator main teeth can be set to be unequal. Specifically, in the circumferential direction of the stator assembly, the width of the groove can be set to be unequal to the width of the notch.

By setting the size of the groove and the notch to be different, the uniformity of the distribution of the stator auxiliary teeth on all stator main teeth on the circumference can be changed, and the number of cycles of the air gap permeance is reduced. By making the air gap permeance As the number of cycles decreases, the flux density harmonic component generated by modulation will increase, so more working harmonics will be generated, which will further increase the output torque of the motor.

In any of the above technical solutions, further, in two adjacent stator main teeth, there is a notch between the stator auxiliary teeth of one stator main tooth and the stator auxiliary teeth of the other stator main tooth; at the notch, The distances from the angle bisectors of two adjacent stator main teeth to two adjacent stator auxiliary teeth are equal or unequal.

In this technical solution, the auxiliary teeth of the stator on the main tooth shoe of the stator can not only be used as a magnetic conductive part, but also can be used as a modulating part to realize the function of magnetic field modulation. Specifically, the distance from the angle bisector of two adjacent stator main teeth to the first stator auxiliary tooth and the second stator auxiliary tooth can be set to be equal, so that the uniformity of the air gap magnetic field distribution can be ensured, which is beneficial to the operation of the motor. stability.

Furthermore, on the basis of ensuring the stability of the motor operation, the distance from the angle bisector of two adjacent stator main teeth to the first stator auxiliary tooth and the second stator auxiliary tooth can also be set to be unequal, that is to say , the tooth shoe or notch shifts to one side of two adjacent stator main teeth, which can change the distribution of the air gap magnetic field and weaken some harmonics in the air gap magnetic field, thereby reducing the torque ripple during the operation of the motor. Improve motor vibration and noise performance.

In any of the above technical solutions, further, the stator assembly includes at least two stacked bodies, any stacked body includes a yoke section and a stator main tooth, and the stator main tooth is arranged on the yoke section, and two adjacent stacked The stator yoke comprises a plurality of yoke segments connected to the yoke segments of the body.

In this technical solution, the stator assembly includes at least two stacked bodies, and the stator assembly is manufactured by stacking the at least two stacked bodies. In this way, during the manufacturing process of the stator assembly, workers can first perform operations such as winding on a single stacked body. Compared with the related art that needs to carry out the winding operation on the integral iron core, the operation space of the stacked body proposed by the present application is larger, which is beneficial to reduce the difficulty of winding, thereby improving the working efficiency of winding and reducing the cost of materials.

In addition, the present application can first perform operations such as winding on a single stacked body, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the motor to which the stator assembly is applied. Moreover, on the basis of reducing the difficulty of winding, the present application can reduce the scrap rate in the winding process, thereby reducing scrap and improving the cost rate of the stator assembly. In addition, the individual stacked body has lower requirements on materials, which can increase the utilization rate of iron core materials, thereby reducing the material cost of the stator assembly.

In any of the above technical solutions, further, the yoke sections of two adjacent stacked bodies are detachably connected; the stator assembly further includes a fixing piece, and the two adjacent stacked bodies are fixed by the fixing piece.

In this technical solution, the yoke sections of two adjacent stacked bodies are detachably connected, thereby ensuring the disassembly and assembly of two adjacent stacked bodies.

Specifically, the stator assembly may include a first connection portion and a second connection portion. Wherein, the first connection part is arranged at the first end of the yoke section, the first connection part is arranged at the second end of the yoke section, and the first end and the second section are oppositely arranged on the yoke section. Moreover, the structures of the first connecting part and the second connecting part match, and the cooperation between the first connecting part and the second connecting part can realize self-locking. Therefore, in the process of splicing stacked bodies, the present application can connect two adjacent stacked bodies through the first connecting part and the second connecting part, including the detachable connection of two adjacent stacked bodies.

Further, one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion. In addition, the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function. Specifically, the recesses include, but are not limited to, the following structures: polygonal grooves, circular grooves, and elliptical grooves; the shape of the convex portion matches the shape of the concave portion.

Further, the stator assembly further includes a fixing piece, and two adjacent stacked bodies are fixed by the fixing piece.

Specifically, after the splicing of two adjacent stacked bodies is completed, the overall structure is further fixed by a fixing member, thereby further improving the structural stability of the spliced stacked body. Specifically, the fixing member can use an insulating frame, so that the insulating frame can also fix the stacked body on the basis of ensuring insulation, thereby realizing the multi-purpose of the insulating frame.

Specifically, two adjacent stacked bodies are connected by welding. in. After the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of welding, thereby further improving the structural stability of the spliced stacked bodies.

Specifically, two adjacent stacked bodies are integrally injected. That is, after the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of integral injection molding, thereby further improving the structural stability of the spliced stacked bodies.

In any of the above technical solutions, further, among two adjacent stator auxiliary teeth, an included angle is formed between the bisector of the main tooth body of one stator auxiliary tooth and the bisector of the main tooth body of the other stator auxiliary tooth β, and satisfy 1≤β/(2π/(a×x))<1.4, where a represents the number of stator main teeth, and x represents the number of stator auxiliary teeth on each stator main tooth.

In this technical solution, among two adjacent stator auxiliary teeth, the angle β formed between the main tooth body bisector of one stator auxiliary tooth and the main tooth body bisector of the other stator auxiliary tooth satisfies 1≤β/(2π/(ax))<1.4; wherein, a represents the number of stator main teeth, and x represents the number of stator auxiliary teeth on each stator main tooth. In this way, the present application further optimizes the structure and distribution of the auxiliary teeth of the stator, so that the amplitude of the harmonics generated by the modulation of the motor is relatively large, and the torque is relatively high, so as to further improve the working efficiency of the motor.

In any of the above technical solutions, further, the tooth shoe is detachably connected to the main tooth body; and/or the main tooth body is detachably connected to the stator yoke.

In this technical solution, a detachable connection can be set between the main tooth body of the stator main tooth and the tooth shoe, and at the same time, a detachable connection can also be set between the main tooth body of the stator main tooth and the stator yoke. The connection, that is, the body of the main tooth of the main tooth of the stator, the stator yoke and the tooth shoe may be arranged as a detachable sheathing assembly structure. Through the setting of the detachable sleeve assembly structure between the main tooth body, the tooth shoe and the stator yoke, during the assembly process of the stator assembly, the coil can be wound on the main tooth body of the stator main tooth first, and then on the Connect one end of the main tooth body with the stator yoke, and finally install the tooth shoe to the other end of the main tooth body. In this way, the simplified winding process in the assembly process of the stator assembly is realized, the difficulty of winding is reduced, the slot filling rate of the winding is improved, the output performance of the motor is improved from the perspective of stator preparation, and waste materials are reduced at the same time.

Specifically, the main tooth body of the stator main tooth and the stator yoke can be connected through a concave-convex structure, that is, a groove or a protrusion is provided at one end of the main tooth body of the stator main tooth, and correspondingly, the stator yoke The corresponding position of the part is provided with a protrusion or a groove that cooperates with the groove or the protrusion, so that the connection between the body of the main tooth of the stator and the stator yoke can be realized through the cooperation of the groove and the protrusion.

Correspondingly, the tooth body of the main tooth and the tooth shoe can also be connected through a concave-convex structure, that is, the connection between the tooth shoe and the tooth body of the main tooth is carried out through mutual matching protrusions and grooves, so as to realize the smoothness of the winding process. simplify.

In any of the above technical solutions, further, the stator assembly further includes a winding, and the winding includes a plurality of coils, and each coil is wound on a main tooth of the stator.

In this technical solution, the stator assembly further includes a winding, and the winding includes a plurality of coils. Specifically, the coil is wound on the main teeth of the stator to ensure the output torque when the motor to which the stator assembly is applied is running.

Furthermore, each coil is only wound on one main tooth of the stator, that is, a single-tooth winding concentrated winding structure is adopted. At this time, the end of the motor winding is small, which is beneficial to reduce copper loss, and facilitates modularization and improves manufacturing. efficiency.

According to a fourth aspect of the present application, a motor is proposed, including: a rotor assembly; a stator assembly according to any one of the above technical solutions, at least a part of the stator assembly is located in the rotor assembly.

In the motor provided by the present application, at least a part of the stator assembly is located in the rotor assembly, specifically, the stator assembly and the rotor assembly are arranged concentrically to ensure that the rotor assembly can rotate relative to the stator assembly to realize the power output of the motor. Wherein, a part of the stator assembly is located in the rotor assembly, and the stator assembly can also be integrally arranged in the rotor assembly in the axial direction, so as to realize different cooperation modes between the permanent magnets of the rotor assembly and the windings of the stator assembly.

Further, the motor provided by the present application includes the stator assembly according to the first aspect of the present application. Therefore, there are all the beneficial effects of the above-mentioned stator assembly, which will not be discussed in detail here.

In the above technical solution, further, there is a first air gap between the auxiliary teeth of the stator and the rotor assembly; from the first end of the tooth shoe to the second end of the tooth shoe, the radial dimension of at least a part of the first air gap gradually increase or decrease.

In this technical solution, the radial dimension of at least a part of the first air gap is set to gradually increase or decrease from the first end of the tooth shoe to the second end of the tooth shoe. On the basis of realizing the formation of an uneven air gap between the stator assembly and the rotor to improve the waveform of the air gap magnetic field, reduce the cogging torque and torque ripple of the motor, and improve the reliability of the motor, the air gap can also be changed. The distribution of gap permeance reduces the number of air gap permeance periods, so that the harmonic components of flux density generated by modulation will increase, and more working harmonics will be generated to further increase the output torque of the motor.

It can be understood that the radial dimension of the air gap is the distance between the stator assembly and the rotor assembly in the radial direction of the stator assembly.

In any of the above technical solutions, further, from the first end of the tooth shoe to the second end of the tooth shoe, the radial dimension of part of the first air gap between the sub-spline surface and the rotor assembly gradually increases or decrease; and/or from the first end of the tooth shoe to the second end of the tooth shoe, the radial dimension of the portion of the first air gap between the main spline surface and the rotor assembly remains unchanged.

In this technical solution, the spline surface at the end of the auxiliary teeth of the stator may at least include a sub-spline surface, and the radial dimension of a part of the first air gap located between the sub-spline surface and the rotor assembly gradually increases or decreases. small, so that the radial dimension of at least a part of the first air gap is set to gradually increase or decrease. On the basis of realizing the formation of an uneven air gap between the stator assembly and the rotor to improve the waveform of the air gap magnetic field, reduce the cogging torque and torque ripple of the motor, and improve the reliability of the motor, the air gap can also be changed. The distribution of gap permeance reduces the number of air gap permeance cycles, so that the harmonic components of flux density generated by modulation will increase, and more working harmonics will be generated to further increase the output torque of the motor.

Further, the spline surface at the end of the auxiliary teeth of the stator may also include a main spline surface, and, from the first end of the tooth shoe to the second end of the tooth shoe, a part of the second spline surface between the main spline surface and the rotor assembly The radial dimension of an air gap does not change. When the stator assembly is mated with the rotor assembly, the first air gap that can be formed between the stator auxiliary teeth of the stator assembly and the rotor assembly is an uneven air gap, thereby improving the waveform of the first air gap magnetic field, so that the permanent magnet is in the The magnetic field formed in the first air gap is more sinusoidal, which can reduce the cogging torque and torque ripple of the motor.

Furthermore, the spline surface at the end of the auxiliary teeth of the stator can include the main spline surface and the sub-spline surface at the same time, so that the torque output by the motor can be further improved, and the cogging torque and torque ripple of the motor can also be reduced .

In any of the above technical solutions, further, the first air gap includes: a first sub-air gap located between the first stator sub-teeth and the rotor assembly; a second sub-air gap located between the second stator sub-teeth and the rotor assembly Between the components; wherein, the first sub-air gap and the second sub-air gap are asymmetrical about the main tooth body bisector of the main tooth body.

In this technical solution, the at least two auxiliary stator teeth include first auxiliary stator teeth and second auxiliary stator teeth. That is, the first air gap includes a first sub-air gap and a second sub-air gap, wherein the first sub-air gap is located between the teeth of the first stator pair and the rotor assembly, and the second sub-air gap is located between the teeth of the second stator pair. between teeth and rotor assembly. Further, the first sub-air gap and the second sub-air gap are asymmetrical with respect to the main tooth body bisector of the main tooth body. Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, when the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two stator auxiliary teeth of the stator cause more harmonic components to be introduced into the air gap permeance, so that the performance of the motor is significantly improved.

In any of the above technical solutions, further, the rotor assembly includes: a rotor core; permanent magnets disposed on the rotor core, and the permanent magnets form a plurality of permanent magnet poles.

In this technical solution, the rotor assembly further includes a rotor core and a permanent magnet. Wherein, the permanent magnet is arranged on the rotor core, and a plurality of permanent magnet poles are formed by the permanent magnet.

Specifically, when at least a part of the rotor assembly is located inside the stator assembly, the permanent magnets can be placed on the outer surface of the rotor core, or placed inside the rotor core, such as V-shaped, spoke-shaped, etc.

Specifically, when at least a portion of the stator assembly is inside the rotor assembly, the permanent magnets are retained on the inner surface of the rotor core. The permanent magnet pole can be composed of a plurality of permanent magnets with two lateral edges and the inner and outer surfaces are roughly arc-shaped, and can also be an integrally formed magnetic ring. Optionally, the permanent magnet material can be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

Further, the permanent magnet includes a plurality of arc-shaped permanent magnets, the plurality of arc-shaped permanent magnets are distributed in a circular shape, and the polarities of two adjacent arc-shaped permanent magnets are different.

Specifically, the permanent magnet includes a plurality of arc-shaped permanent magnets. Wherein, a plurality of arc-shaped permanent magnets are distributed in a circular shape, and the polarities of two adjacent arc-shaped permanent magnets are different. Specifically, the number of magnetic poles of each arc-shaped permanent magnet is 1, 2 or 4, and the polarities of adjacent magnetic poles are alternately different.

Further, the permanent magnet includes an integral annular permanent magnet. At this time, when the ring-shaped permanent magnet has multiple magnetic poles, the number of permanent magnets can be reduced, the process time for installing the permanent magnets can be reduced, and the manufacturing and assembly efficiency can be improved. Moreover, when the width of the magnetic poles is small, the way of filling multiple poles with one annular permanent magnet can increase the width of the annular permanent magnet and reduce the processing difficulty of the annular permanent magnet.

According to a fifth aspect of the present application, an electrical device is provided, including the motor according to the fourth aspect of the present application.

The electrical equipment provided by the present application includes the motor according to the fourth aspect of the present application, so it has all the beneficial effects of the motor, and will not be repeated here.

The sixth aspect of the present application provides a stator assembly, including: a stator core, the stator core includes a stator yoke and a stator main tooth, and the stator main tooth includes: a main tooth body, a tooth root of the main tooth body and a stator yoke The tooth shoe is set on the top of the tooth body of the main tooth, the tooth shoe is provided with the first auxiliary tooth and the second auxiliary tooth, and there is a groove between the first auxiliary tooth and the second auxiliary tooth; the winding is set On the main tooth of the stator; wherein, the tooth shoe is asymmetrically arranged with respect to the bisector of the main tooth body of the main tooth body.

The stator assembly proposed by the present application includes a stator core and a winding. Wherein, the stator core includes a stator yoke and stator main teeth arranged on the stator yoke. The stator main tooth includes a main tooth body and a tooth shoe; the root of the main tooth body is connected to the stator yoke, and the tooth top of the main tooth body is provided with a tooth shoe. In addition, the winding is arranged on the main teeth of the stator, and the tooth shoe can limit the winding to a certain extent, so as to ensure that the winding is stably positioned on the main teeth of the stator.

Further, in the stator assembly proposed by the present application, the first pair of teeth and the second pair of teeth are arranged on the tooth shoe, and the first pair of teeth and the second pair of teeth are distributed on the tooth shoe at intervals, and the first pair of teeth and the second pair of teeth There are grooves between the auxiliary teeth. In this way, the first auxiliary teeth and the second auxiliary teeth can not only serve as magnetically permeable parts, but also serve as modulating parts to realize the function of magnetic field modulation. At this time, it is different from the conventional permanent magnet motor adopted in the related art (the slot opening is small, and the air gap permeance is close to constant). In the stator assembly proposed by the present application, the main teeth of the stator are divided into at least the first auxiliary teeth and the second auxiliary teeth, so that more harmonic components are introduced into the air gap permeance. In this way, the performance of the motor to which the stator assembly is applied is significantly improved.

Furthermore, in the stator assembly proposed by the present application, the tooth shoe is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body, so that the tooth shoe or the groove faces one side of the main tooth body bisector of the main tooth body side offset. In this way, the permeance distribution of the air gap can be changed to weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor to which the stator assembly is applied.

Therefore, in the stator assembly proposed by the present application, at least the first auxiliary teeth and the second auxiliary teeth are provided on the tooth shoes of the main teeth of the stator, and then the first auxiliary teeth and the second auxiliary teeth are used as modulation components to realize the magnetic field modulation , so that more harmonic components are introduced into the air gap permeance, so that the performance of the motor to which the stator assembly is applied is significantly improved. Moreover, the gear shoe is asymmetrically arranged with respect to the main tooth body bisector of the main tooth body, so that the tooth shoe or the groove is offset toward one side of the main tooth body bisector of the main tooth body, thereby changing the air gap permeability Distributed to weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor to which the stator assembly is applied.

In some possible designs, in the circumferential direction of the stator assembly, the distances from the two side walls of the groove to the bisector of the main tooth body of the main tooth body are not equal.

In this design, in the circumferential direction of the stator assembly, the distances from the two side walls of the groove to the bisector of the main tooth body of the main tooth body are not equal. That is to say, the groove in the motor proposed in the present application is offset toward one side of the main tooth body bisector of the main tooth body, so as to realize the asymmetrical arrangement of the tooth shoe with respect to the main tooth body bisector of the main tooth body. In this way, the motor using the stator assembly can realize the magnetic field modulation effect, generate and use more working harmonics, thereby increasing the output torque of the motor. Moreover, the torque ripple can be reduced to improve the running stability of the motor to which the stator assembly is applied, and reduce the vibration and noise of the motor running.

In some possible designs, in the circumferential direction of the stator assembly, the distances from the two ends of the tooth shoe to the bisector of the main tooth body of the main tooth body are not equal.

In this design, in the circumferential direction of the stator assembly, the distances from both ends of the tooth shoe to the bisector of the main tooth body of the main tooth body are not equal. That is to say, the tooth shoe in the motor proposed by the present application is offset toward one side of the main tooth body bisector of the main tooth body, so as to realize the asymmetric arrangement of the tooth shoe with respect to the main tooth body bisector of the main tooth body. In this way, the motor using the stator assembly can realize the magnetic field modulation effect, generate and use more working harmonics, thereby increasing the output torque of the motor. Moreover, the torque ripple can be reduced to improve the running stability of the motor to which the stator assembly is applied, and reduce the vibration and noise of the motor running.

In some possible designs, the number of main teeth of the stator is at least two, and there is a slot between the adjacent first auxiliary teeth and the second auxiliary teeth. The angle bisector of the angle formed between the tooth body bisectors is not equal to the distance from the first pair of teeth and the second pair of teeth.

In this design, the number of stator main teeth is at least two. Among the two adjacent stator main teeth, there is a notch between the first auxiliary tooth of one stator assembly and the second auxiliary tooth of the other stator main tooth, and the notch can be used by workers to wind the winding to the stator main tooth on the main tooth. In addition, at the notch, the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies has different distances from the first auxiliary tooth and the second auxiliary tooth.

That is to say, in the motor proposed in this application, the notch is offset from the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies, so as to realize that the tooth shoe is about The main tooth body bisector of the main tooth body is asymmetrically set. In this way, the motor using the stator assembly can realize the magnetic field modulation effect, generate and use more working harmonics, thereby increasing the output torque of the motor. Moreover, the torque ripple can be reduced to improve the running stability of the motor to which the stator assembly is applied, and reduce the vibration and noise of the motor running.

In some possible designs, the size of the notch is unequal to the size of the groove in the circumferential direction of the stator assembly.

In this design, the size of the notch is unequal to the size of the groove in the circumferential direction of the stator assembly. In this way, the uniformity of the distribution of the stator auxiliary teeth (the stator auxiliary teeth include at least the first auxiliary teeth and the second auxiliary teeth) on the circumference will be changed, that is, the number of cycles of the air gap magnetic permeance will be reduced, and the air gap flux density will work separately. Harmonic is the number of pole pairs: |Pr±i×Zf|(i=0, 1, 2...), Zf is the number of air-gap permeance cycles; when the number of air-gap permeance cycles decreases, the modulation generated The magnetic density harmonic component will increase, that is, more working harmonics will be generated, which will further increase the output torque of the motor.

In some possible designs, the size of the slot is smaller than the size of the groove in the circumferential direction of the stator assembly.

In this design, the size of the slot is smaller than the size of the groove in the circumferential direction of the stator assembly. In this way, the application further optimizes the distribution of the first auxiliary teeth and the second auxiliary teeth on the circumference, and further reduces the number of cycles of the air gap permeance, so that more working harmonics are generated, and the output torque of the motor will be further improved.

In some possible designs, the stator yoke is annular, and the roots of the main teeth of the stator are connected to the outer peripheral wall of the stator yoke.

In this design, the stator yoke is annular. In addition, the dedendum of the main teeth of the stator is connected to the outer peripheral wall of the stator yoke. In this way, the stator assembly proposed in this application is an inner stator, which can be used in conjunction with an outer rotor to output torque.

In some possible designs, the angle β formed by the bisector of the main tooth body of the first auxiliary tooth and the main tooth body bisector of the second auxiliary tooth satisfies: 1≤β/(2π/(ax))<1.4 , where a represents the number of stator main teeth, x represents the number of stator auxiliary teeth on each stator main tooth, and the stator auxiliary teeth include first auxiliary teeth and second auxiliary teeth.

In this design, the angle β formed between the main tooth body bisector of the first auxiliary tooth and the main tooth body bisector of the second auxiliary tooth satisfies: 1≤β/(2π/(ax))<1.4, where , a represents the number of stator main teeth, x represents the number of stator auxiliary teeth on each stator main tooth, and the stator auxiliary teeth include first auxiliary teeth and second auxiliary teeth. In this way, the present application further optimizes the structure and distribution of the auxiliary teeth of the stator, so that the harmonic amplitude generated by the modulation of the motor using the stator assembly is larger and the torque is higher, so as to further improve the working efficiency of the motor.

In some possible designs, the stator core includes at least two stacked bodies, any stacked body includes a yoke section and a stator main tooth, the stator main tooth is arranged on the yoke section, and the yokes of the adjacent two stacked bodies The stator yoke includes a plurality of yoke sections.

In this design, the stator core includes at least two stacked bodies, and the stator core is manufactured by stacking the at least two stacked bodies. In this way, during the manufacturing process of the stator core, workers can first perform operations such as winding on a single stack. Compared with the phase technology that needs to perform winding operation on the integral iron core, the stacked body proposed in this application has a larger operating space, which is conducive to reducing the difficulty of winding, thereby improving the working efficiency of winding and reducing material costs.

In addition, the present application can first perform operations such as winding on a single stacked body, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the applied motor. Moreover, on the basis of reducing the difficulty of winding, the present application can reduce the scrap rate in the winding process, thereby reducing scrap and improving the cost rate of the stator core. In addition, the individual stacked body has lower requirements on materials, which can increase the utilization rate of iron core materials, thereby reducing the material cost of the stator iron core.

In some possible designs, the yoke sections of two adjacent stacks are detachably connected.

In this design, the yoke sections of two adjacent stacked bodies are detachably connected, thereby ensuring the disassembly and assembly of the two adjacent stacked bodies.

Specifically, the stator core further includes a first connecting portion and a second connecting portion. Wherein, the first connection part is arranged at the first end of the yoke section, the first connection part is arranged at the second end of the yoke section, and the first end and the second section are oppositely arranged on the yoke section. Moreover, the structures of the first connecting part and the second connecting part match, and the cooperation between the first connecting part and the second connecting part can realize self-locking. Therefore, in the process of splicing stacked bodies, the present application can connect two adjacent stacked bodies through the first connecting part and the second connecting part, including the detachable connection of two adjacent stacked bodies.

In this design, one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion. In addition, the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function. Specifically, the recesses include, but are not limited to, the following structures: polygonal grooves, circular grooves, and elliptical grooves; the shape of the convex portion matches the shape of the concave portion.

In some possible designs, the stator assembly further includes a fixing piece, and two adjacent stacked bodies are fixed by the fixing piece.

In this design, the stator assembly also includes a fixing. in. After the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure through a fixing member, thereby further improving the structural stability of the spliced stacked bodies. Specifically, the fixing member can use an insulating frame, so that the insulating frame can also fix the stacked body on the basis of ensuring insulation, thereby realizing the multi-purpose of the insulating frame.

In some possible designs, two adjacent stacks are connected by welding.

In this design, two adjacent stacks are welded together. in. After the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of welding, thereby further improving the structural stability of the spliced stacked bodies.

In some possible designs, two adjacent stacked bodies are integrally injected.

In this design, two adjacent stacked bodies are integrally injection molded. That is, after the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of integral injection molding, thereby further improving the structural stability of the spliced stacked bodies.

In some possible designs, the root of the body of the main tooth is detachably connected to the stator yoke.

In this design, the main tooth body of the stator main tooth is detachably connected to the stator yoke. In this way, during the manufacturing process of the stator core, the wire can be wound on a single stack containing the main teeth of the stator first, and then installed on the stator yoke. , can increase the circumferential width of the tooth shoe and reduce the width of the notch, so as to avoid the influence of the too large notch on the performance of the motor.

In some possible designs, the crest of the tooth body of the main tooth is detachably connected with the tooth shoe.

In this design, the tooth shoe is detachably connected to the main tooth body of the stator main tooth. In this way, during the manufacturing process of the stator core, the wire can be wound on the single stacked body containing the main teeth of the stator first, and then the tooth shoe can be installed. Increase the circumferential width of the tooth shoe and reduce the width of the notch, so as to avoid the influence of the too large notch on the performance of the motor.

The seventh aspect of the present application provides a motor, including: the stator assembly according to the sixth aspect of the present application; the rotor assembly, the rotor assembly includes a rotor core and a plurality of permanent magnets, the plurality of permanent magnets are arranged on the rotor core, and Distributed at intervals in the circumferential direction of the rotor iron core, the magnetic poles of two adjacent permanent magnets are different.

The motor proposed in the present application includes the stator assembly according to the sixth aspect of the present application. Therefore, it has all the beneficial effects of the above-mentioned stator assembly, which will not be discussed in detail here.

In addition, the electric machine also includes a rotor assembly. Wherein, the rotor assembly includes a rotor core and a plurality of permanent magnets; the plurality of permanent magnets are arranged on the rotor core and distributed at intervals in the circumferential direction of the rotor core, and the polarities of adjacent permanent magnets are different. During the operation of the motor, the rotor assembly can cooperate with the stator assembly and output torque.

In some possible designs, at least a portion of the stator assembly is located inside the rotor assembly.

In this design, at least a portion of the stator assembly is located inside the rotor assembly. At this time, the stator assembly is used as the inner stator, and the rotor assembly is used as the outer rotor. Additionally, with at least a portion of the stator assembly located inside the rotor assembly, the permanent magnets are retained on the inner surface of the rotor core. The permanent magnet pole can be composed of a plurality of permanent magnets with two lateral edges and the inner and outer surfaces are roughly arc-shaped, and can also be an integrally formed magnetic ring. Optionally, the permanent magnet material can be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

In some possible designs, at least a portion of the rotor assembly is located inside the stator assembly.

In this design, at least a portion of the rotor assembly is located inside the stator assembly. At this time, the rotor assembly is used as a rotary stator, and the stator assembly is used as an outer stator. In addition, when at least a part of the rotor assembly is located inside the stator assembly, the permanent magnets forming the permanent magnet poles are placed on the outer surface or inside of the rotor iron core, or placed inside the iron core, such as V-shaped, spoke-shaped, etc.

In some possible designs, the number of pole pairs Ps of the winding satisfies: Ps=│ax±Pr│, a represents the number of stator main teeth, x represents the number of stator auxiliary teeth on each stator main tooth, and Pr represents the number of permanent The number of pole pairs of the magnet, wherein the stator auxiliary teeth include the first auxiliary teeth and the second auxiliary teeth.

In this design, the number of pole pairs Ps of the winding satisfies: Ps=│ax±Pr│, a represents the number of stator main teeth, x represents the number of stator auxiliary teeth on each stator main tooth, and Pr represents the number of permanent magnets The number of pairs of poles, wherein the auxiliary teeth of the stator include the first auxiliary teeth and the second auxiliary teeth. Under this limitation, the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.

The eighth aspect of the present application provides an electrical device, including: the motor according to the seventh aspect of the present application.

The electrical equipment proposed in the present application includes the motor according to the seventh aspect of the present application. Therefore, it has all the beneficial effects of the above motor, and will not be discussed in detail here.

Specifically, the electrical equipment proposed in this application may be products such as refrigerators, washing machines, and air conditioners.

Additional aspects and advantages of the application will become apparent in the description which follows, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the structural representation of the motor of an embodiment of the present application;

Fig. 2 is one of the schematic structural views of the stator core in the motor of an embodiment of the present application;

Fig. 3 is the second structural schematic diagram of the stator core in the motor according to one embodiment of the present application;

Fig. 4 is one of the structural schematic diagrams of the stacked body of the stator core in the motor according to an embodiment of the present application;

Fig. 5 is the second structural schematic diagram of the stacked body of the stator core in the motor according to one embodiment of the present application;

Fig. 6 is the third schematic structural view of the stator core in the motor according to an embodiment of the present application;

Fig. 7 is the fourth schematic structural view of the stator core in the motor according to an embodiment of the present application;

Fig. 8 is one of the structural schematic diagrams of the rotor assembly in the motor according to an embodiment of the present application;

Fig. 9 is the second structural schematic diagram of the rotor assembly in the motor according to one embodiment of the present application;

Fig. 10 is one of the structural schematic diagrams of the permanent magnet of the rotor assembly in the motor according to one embodiment of the present application;

Fig. 11 is the second structural representation of the permanent magnet of the rotor assembly in the motor of an embodiment of the present application;

Fig. 12 is the third schematic structural view of the permanent magnet of the rotor assembly in the motor according to an embodiment of the present application;

Fig. 13 is one of the schematic diagrams of the influence of d1 and d2 on the performance of the motor in an embodiment of the present application;

Figure 14 is the second schematic diagram of the influence of d1 and d2 on the performance of the motor in an embodiment of the present application;

Fig. 15 is a schematic diagram of the influence of d3 and d4 on the performance of the motor in an embodiment of the present application;

Fig. 16 is a schematic diagram of the influence of d5 and d6 on the performance of the motor in an embodiment of the present application;

Fig. 17 is a schematic diagram of the influence of the motor angle β on the performance of the motor according to an embodiment of the present application;

Fig. 18 shows a schematic structural view of a stator assembly provided by an embodiment of the present application;

Figure 19 shows a partial enlarged view at A in Figure 18;

Fig. 20 shows a schematic structural view of a stator assembly provided by another embodiment of the present application;

Fig. 21 shows a schematic structural view of a stator assembly provided by another embodiment of the present application;

Fig. 22 shows a schematic structural diagram of a stator assembly provided in another embodiment of the present application;

Fig. 23 shows a schematic structural diagram of a motor provided by an embodiment of the present application;

Figure 24 shows a schematic structural view of the rotor assembly in the motor of Figure 23;

Fig. 25 is one of the structural schematic diagrams of the stator core in the stator assembly according to an embodiment of the present application;

Fig. 26 is the second structural schematic diagram of the stator core in the stator assembly according to an embodiment of the present application;

Fig. 27 is the third schematic structural view of the stator core in the stator assembly according to an embodiment of the present application;

Fig. 28 is a schematic structural view of a single stack in the stator core shown in Fig. 27;

Fig. 29 is a schematic structural view of a single stack of stator cores in a stator assembly according to yet another embodiment of the present application;

Fig. 30 is the fourth schematic structural view of the stator core in the stator assembly according to an embodiment of the present application;

Fig. 31 is the fifth schematic structural view of the stator core in the stator assembly according to an embodiment of the present application;

Fig. 32 is a schematic structural diagram of a motor according to an embodiment of the present application;

Fig. 33 is a schematic structural view of the rotor assembly in the motor shown in Fig. 32;

Fig. 34 is a schematic diagram of the influence of the sizes of d3 and d4 on the performance of the motor in an embodiment of the present application;

Fig. 35 is a schematic diagram of the influence of the size of L3 and L4 on the performance of the motor in an embodiment of the present application;

Fig. 36 is a schematic diagram of the influence of the size of d5 and d6 on the performance of the motor in an embodiment of the present application;

Figure 37 is one of the schematic diagrams of the influence of the size of d1 and d2 on the performance of the motor in an embodiment of the present application;

Figure 38 is the second schematic diagram of the influence of the size of d1 and d2 on the performance of the motor in an embodiment of the present application;

Fig. 39 is a schematic diagram of the influence of the angle β in the motor on the performance of the motor according to an embodiment of the present application.

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 39 is:

102 stator assembly, 104 stator core, 106 main tooth body, 108 stator yoke, 110 stator main tooth, 112 tooth shoe, 114 stator auxiliary tooth, 116 rotor assembly, 118 groove, 120 stator slot, 122 notch, 124 stacked body, 126 yoke section, 128 rotor core, 130 permanent magnet, 132 spline plane, 134 first spline surface, 136 spline surface, 138 secondary spline surface, 140 first spline surface, 142 The second spline surface, 144 the first stator auxiliary teeth, 146 the second stator auxiliary teeth, 148 the first air gap, 150 the first sub-air gap, 152 the second sub-air gap, 154 the second connection part, 156 motor, 164 main spline surface, 166 first connection part.

Detailed ways

In order to better understand the above-mentioned purpose, features and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the application, but the application can also be implemented in other ways different from those described here, therefore, the protection scope of the application is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

A stator assembly, a motor and electrical equipment provided according to some embodiments of the present application are described below with reference to FIGS. 1 to 39 . The dotted line L1 in FIG. 2 represents the tooth body bisector of the stator main tooth 110, the dotted line L2 in FIG. 2 represents the angle bisector of two adjacent stator main teeth 110, and the dotted line L3 in FIG. .

In the first aspect, as shown in FIG. 1 , the first embodiment of the present application proposes a motor, a stator assembly 102 and a rotor assembly 116 . Wherein, the stator assembly 102 includes a stator core 104 and a stator winding (not shown in the figure), and the rotor assembly 116 includes a plurality of permanent magnet poles, and adjacent permanent magnet poles have different polarities. During the operation of the motor, the rotor assembly 116 can cooperate with the stator assembly 102 and output torque.

Further, as shown in FIGS. 1 and 2 , the stator core 104 includes a stator yoke 108 , stator main teeth 110 and at least two stator auxiliary teeth 114 . Wherein, the stator main teeth 110 are arranged on the stator yoke 108 , and the roots of the stator main teeth 110 are connected to the stator yoke 108 , and the tooth tips of the stator main teeth 110 are provided with tooth shoes 112 . In addition, the stator winding is arranged on the stator main tooth 110 , and the tooth shoe 112 can limit the stator winding to ensure that the stator winding is stably positioned on the stator main tooth 110 . Moreover, the motor has a simple structure, is convenient for processing and manufacturing, does not significantly increase the cost of the motor, and the motor does not generate large vibration and noise.

Furthermore, as shown in FIG. 2 , at least two auxiliary stator teeth 114 are provided on the tooth shoe 112 , and the auxiliary stator teeth 114 can also be used as modulating components in addition to being used as magnetically conductive components to realize magnetic field modulation. At this time, it is different from the conventional permanent magnet motor adopted in the related art (the slot opening is small, and the air gap permeance is close to constant). In the motor proposed in this application, the main stator tooth 110 is split into at least two auxiliary stator teeth 114, so that more harmonic components are introduced into the air-gap permeance. In this way, the performance of the motor is significantly improved.

Furthermore, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│. Wherein, a represents the number of stator main teeth 110 , x represents the number of stator auxiliary teeth 114 on each stator main tooth 110 , and Pr represents the number of pole pairs of a plurality of permanent magnet poles. The new harmonic components appearing in the air-gap magnetic density can be used as the working harmonics of the motor to provide output torque for the motor, thereby effectively improving the torque density of the motor.

Therefore, in the motor proposed in this application, at least two stator auxiliary teeth 114 are provided on the tooth shoe 112 of the stator main tooth 110, and the stator auxiliary teeth 114 are used as modulating components to realize the function of magnetic field modulation, so that the air gap magnetic conductance The introduction of more harmonic components has significantly improved the performance of the motor. Furthermore, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│. Under this limitation, the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.

The second embodiment of the present application proposes a motor, on the basis of the first embodiment, further:

As shown in FIG. 2 , at least two stator auxiliary teeth 114 are distributed at intervals on the stator yoke 108 , and there is a groove 118 between two adjacent stator auxiliary teeth 114 .

In addition, in the motor proposed in this application, the size of the groove 118 between two adjacent stator auxiliary teeth 114 in the circumferential direction of the stator assembly 102 is larger than that of the permanent magnet motor used in the related art. That is to say, the size of the groove 118 between two adjacent stator auxiliary teeth 114 in the motor proposed by the present application is larger, so that more harmonic components are introduced into the air gap permeance, so that when the permanent magnet magnetomotive force and When the air-gap permeance with harmonics acts, new harmonic components will appear in the air-gap flux density.

Further, on the basis of the new harmonic components appearing in the air-gap flux density, this application further optimizes the number of pole pairs Ps of the stator winding, so that the new harmonic components appearing in the air-gap flux density can be used as motor The working harmonics provide the output torque for the motor, thus effectively improving the torque density of the motor.

The third embodiment of the present application proposes a motor, on the basis of the first embodiment and the second embodiment, further:

As shown in FIG. 2 , there are stator slots 120 between two adjacent stator main teeth 110 , and the stator windings are wound on the stator main teeth 110 and accommodated in the stator slots 120 . In addition, a notch 122 is formed between the tooth shoes 112 of two adjacent stator main teeth 110 , and the notch 122 communicates with the stator slot 120 , and workers can wind the stator winding on the stator main tooth 110 through the notch 122 .

In this embodiment, further, in the motor proposed in this application, the stator winding includes a plurality of coils, and each coil is only wound on one stator main tooth 110, that is, a single-tooth-wound concentrated winding structure is adopted. At this time The end of the motor winding is small, which is beneficial to reduce copper loss, facilitates modularization, and improves manufacturing efficiency.

In this embodiment, further, as shown in FIG. 2 , the shape of the groove 118 can be designed according to actual conditions. Specifically, the groove 118 can be designed as a polygonal groove, an arc groove, or the like. More specifically, the groove 118 can be designed as a square groove, a trapezoidal groove, a triangular groove, or other polygonal grooves.

The fourth embodiment of the present application proposes a motor, on the basis of the third embodiment, further:

As shown in FIG. 2 , the size of the notch 122 is not equal to the size of the groove 118 in the circumferential direction of the stator assembly 102 . Specifically, the size of the groove 118 is greater than the size of the notch 122 in the circumferential direction of the stator assembly 102 . Specifically, as shown in FIG. 2 , in the circumferential direction of the stator assembly 102 , the groove 118 between two adjacent stator auxiliary teeth 114 is d1, the size of the notch 122 is d2, and d1>d2 is satisfied.

In this way, the uniformity of the distribution of the stator auxiliary teeth 114 on the circumference will be changed, that is, the number of cycles of the air gap permeance will be reduced, and the number of pole pairs for each working harmonic of the air gap flux density is: |Pr±i×Zf| (i=0, 1, 2...), Zf is the number of air-gap permeance periods; when the air-gap permeance period decreases, the harmonic components of magnetic density generated by modulation will increase, which will generate more work Harmonics will further increase the output torque of the motor.

Specifically, as shown in FIG. 13 , in the circumferential direction of the stator assembly 102 , the groove 118 between two adjacent stator auxiliary teeth 114 is d1, the size of the notch 122 is d2, and d1>d2 is satisfied. At this time, the harmonics can be significantly weakened, and the cogging torque of the motor is reduced, improving the performance of the motor. Specifically, in Figure 13, the abscissa represents the number of times, the ordinate represents the no-load air-gap magnetic density ramp-T, the filled bars represent the relevant parameters when d1≠d2, and the blank bars represent the parameters when d1=d2 Related parameters. As shown in Figure 13, after d1≠d2, the number of periods of the air-gap permeance is reduced, and the number of working harmonics of the air-gap flux density is: |Pr±i×Zf|(i=0,1 , 2...), Zf is the period number of air gap permeance; when the number of air gap permeance period decreases, the harmonic component of flux density generated by modulation will increase. Such as 4/8/16 harmonics.

Further, as shown in FIG. 14 , in the circumferential direction of the stator assembly 102 , the groove 118 between two adjacent stator auxiliary teeth 114 is d1, the size of the notch 122 is d2, and d1>d2 is satisfied. At this time, the output back electromotive force of the motor will be further increased, thereby increasing the torque. In Fig. 14, the abscissa represents the electrical angle of the motor, the ordinate represents the no-load back EMF -V, Q1 represents the relevant parameters when d1=d2, and Q2 represents the relevant parameters when d1≠d2.

The fifth embodiment of the present application proposes a motor, on the basis of the third embodiment and the fourth embodiment, further:

As shown in FIG. 2 , the distance from the tooth body bisector of the stator main tooth 110 to the two side walls of the groove 118 is equal. Thus, the groove 118 is located in the middle of the tooth shoe 112 in the circumferential direction of the stator assembly 102 . Such a design can simplify the overall structure of the stator main teeth 110 and facilitate the manufacturing of the stator main teeth 110 , thereby improving the processing efficiency of the stator assembly 102 and the entire motor. Specifically, as shown in FIG. 2 , in the circumferential direction of the stator assembly 102 , the distances from the tooth body bisector of the stator main tooth 110 to the two side walls of the groove 118 are d3 and d4 respectively, and d3 is equal to d4.

In addition, the distance from the tooth body bisector of the stator main tooth 110 to the two side walls of the groove 118 may also be different. Thus, in the circumferential direction of the stator assembly 102, the groove 118 is offset towards one end of the tooth shoe 112. Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, when the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two auxiliary stator teeth 114 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.

Specifically, as shown in FIG. 15 , the distance between the tooth body bisector of the stator main tooth 110 and the two side walls of the groove 118 is not equal (that is, d3≠d4). At this time, the harmonic wave can be significantly weakened, and the motor Cogging torque is reduced, improving motor performance. Wherein, in FIG. 15, the abscissa represents the electrical angle of the motor, the ordinate represents the cogging torque (Nm) of the motor, Q3 represents the relevant parameters when d3=d4, and Q4 represents the relevant parameters when d3≠d4.

The sixth embodiment of the present application proposes a motor, on the basis of the third embodiment, the fourth embodiment and the fifth embodiment, further:

As shown in FIG. 2 , there are at least two auxiliary stator teeth 114 located at the end of the tooth shoe 112 . Moreover, among two adjacent stator main teeth 110 , there is a notch 122 between the stator auxiliary tooth 114 of one stator main tooth 110 and the stator auxiliary tooth 114 of the other stator main tooth 110 .

In this embodiment, at the notch 122 , as shown in FIG. 2 , the distances from the bisectors of the angles of two adjacent stator main teeth 110 to two adjacent stator auxiliary teeth 114 are equal. In this way, the notch 122 is located in the middle of two adjacent stator auxiliary teeth 114 . Such a design can simplify the overall structure of the stator main teeth 110 and facilitate the manufacturing of the stator main teeth 110 , thereby improving the processing efficiency of the stator assembly 102 and the entire motor. Specifically, as shown in FIG. 2 , at the notch 122 , the distances from the angle bisectors of two adjacent stator main teeth 110 to two adjacent stator auxiliary teeth 114 are d5 and d6, and d5 is equal to d6.

In this embodiment, at the notch 122 , the distance from the angle bisector of two adjacent stator main teeth 110 to two adjacent stator auxiliary teeth 114 may also be different (not shown in the figure). In this way, the notches 122 are located adjacently and offset in a direction towards one of the auxiliary stator teeth 114 , which forms the offset arrangement of the notches 122 . Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, more harmonic components are introduced into the air-gap flux density; and, when the permanent magnet magnetomotive force interacts with the air-gap flux density containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two auxiliary stator teeth 114 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.

Specifically, as shown in Fig. 16, the distances from the bisectors of the angles of two adjacent stator main teeth 110 to two adjacent stator auxiliary teeth 114 are not equal (that is, d5≠d6). At this time, the harmonics can be significantly weakened, and the cogging torque of the motor is reduced, improving the performance of the motor. 16, the abscissa represents the electric angle of the motor, the ordinate represents the cogging torque (Nm) of the motor, Q5 represents the relevant parameters when d5=d6, and Q6 represents the relevant parameters when d5≠d6.

The seventh embodiment of the present application proposes a motor. On the basis of the third embodiment, the fourth embodiment, the fifth embodiment and the sixth embodiment, further:

As shown in Figure 2, among two adjacent stator auxiliary teeth 114, the angle β formed between the tooth body bisector of one stator auxiliary tooth 114 and the tooth body bisector of the other stator auxiliary tooth 114 satisfies 1 ≤β/(2π/(ax))<1.4; wherein, a represents the number of stator main teeth 110 , and x represents the number of stator auxiliary teeth 114 on each stator main tooth 110 .

In this way, the present application further optimizes the structure and distribution of the auxiliary stator teeth 114, so that the amplitude of the harmonic generated by applying the motor modulation is relatively large, and the torque is relatively high, so as to further improve the working efficiency of the motor.

Specifically, as shown in FIG. 17 , the included angle β satisfies: 1≤β/(2π/(ax))<1.4, which can significantly improve the efficiency of the motor, making the efficiency advantage of the motor more obvious. Wherein, the abscissa in FIG. 17 represents the value of β/(2π/(ax)), the ordinate represents the motor efficiency, and the curve Q7 represents the relevant parameters of the motor efficiency.

The eighth embodiment of the present application proposes a motor, in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment and On the basis of the seventh embodiment, further:

As shown in FIG. 3 , the stator assembly 102 includes at least two stacked bodies 124 , and the stator assembly 102 is manufactured by stacking at least two stacked bodies 124 . In this way, during the manufacturing process of the stator assembly 102 , workers can first perform operations such as winding wires on a single stack 124 .

In particular, compared with the related art that needs to carry out the winding operation on the integral iron core, the stacked body 124 proposed by the present application has a larger operating space, which is conducive to reducing the difficulty of winding, thereby improving the working efficiency of winding and reducing the cost of materials. cost.

In addition, in the present application, operations such as winding can be performed on a single stack 124 first, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the applied motor. Moreover, on the basis of reducing the difficulty of winding, the present application can reduce the scrap rate during the winding process, thereby reducing scrap and improving the cost rate of the stator assembly 102 . In addition, the individual stacked body 124 has lower requirements on materials, which can increase the utilization rate of iron core materials, thereby reducing the material cost of the stator assembly 102 .

Specifically, as shown in FIGS. 4 and 5 , the yoke section 126 of a stack 124 may include one stator main tooth 110 , or may include two or more stator main teeth 110 .

The ninth embodiment of the present application proposes a motor, on the basis of the eighth embodiment, further:

As shown in FIG. 4 , the yoke sections 126 of two adjacent stacked bodies 124 are detachably connected, thereby ensuring the disassembly and assembly of two adjacent stacked bodies 124 .

Specifically, as shown in FIG. 4 , the stator assembly 102 further includes a first connecting portion and a second connecting portion. Wherein, the first connection part is arranged at the first end of the yoke section 126, the second connection part is arranged at the second end of the yoke section 126, and the first end and the second end are oppositely arranged on the yoke section 126. . Moreover, the structures of the first connecting part and the second connecting part match, and the cooperation between the first connecting part and the second connecting part can realize self-locking.

Therefore, in the process of splicing the stacked bodies 124 , the present application can connect two adjacent stacked bodies 124 through the first connecting part and the second connecting part, including the detachable connection of the two adjacent stacked bodies 124 .

In this embodiment, further, as shown in FIG. 4 , one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion. In addition, the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function.

In this embodiment, further, as shown in FIG. 4 , the concave portion includes but not limited to the following structures: polygonal groove, circular groove, and elliptical groove; the shape of the convex portion matches the shape of the concave portion.

The tenth embodiment of the present application proposes a motor, on the basis of the ninth embodiment, further:

The stator assembly 102 also includes a fastener (not shown). in. After the splicing of two adjacent stacked bodies 124 is completed, the present application further fixes the overall structure through a fixing member, thereby further improving the structural stability of the spliced stacked bodies 124 .

Specifically, the fixing member can be an insulating frame, so that the insulating frame can also fix the stacked body 124 on the basis of ensuring insulation, realizing the multi-purpose of the insulating frame.

In addition, two adjacent stacked bodies 124 can also be connected by welding. in. After the splicing of two adjacent stacked bodies 124 is completed, the present application further fixes the overall structure by means of welding, thereby further improving the structural stability of the spliced stacked bodies 124 .

In addition, two adjacent stacked bodies 124 can also be integrally injected. That is, after the splicing of two adjacent stacked bodies 124 is completed, the present application further fixes the overall structure by integral injection molding, thereby further improving the structural stability of the spliced stacked bodies 124.

The eleventh embodiment of the present application proposes a motor. On the basis of the ninth embodiment and the tenth embodiment, further:

As shown in FIG. 6 , the main tooth body 106 of the stator main tooth 110 is detachably connected to the stator yoke 108 . In this way, during the manufacturing process of the stator assembly 102, the wire can be wound on the single stacked body 124 containing the stator main teeth 110 first, and then installed on the stator yoke 108. On the one hand, it is convenient for wire winding and improves the slot fullness of the motor. On the other hand, the circumferential width of the tooth shoe 112 can be increased, and the width of the notch 122 can be reduced, so as to avoid the influence of the too large notch 122 on the performance of the motor.

The twelfth embodiment of the present application proposes a motor. On the basis of the ninth embodiment, the tenth embodiment and the eleventh embodiment, further:

As shown in FIG. 7 , the tooth shoe 112 is detachably connected to the main tooth body 106 of the stator main tooth 110 . In this way, during the manufacturing process of the stator assembly 102, the wire can be wound first on the single stacked body 124 containing the stator main teeth 110, and then the tooth shoe 112 can be installed. On the one hand, the circumferential width of the tooth shoe 112 can be increased, and the width of the notch 122 can be reduced, so as to avoid the influence of the too large notch 122 on the performance of the motor.

On the basis of any of the above embodiments, further, at least a part of the rotor assembly 116 is located inside the stator assembly 102 (not shown in the figure). That is, the present application proposes that the motor is a radial motor, the stator assembly 102 is an outer stator, and the rotor assembly 116 is an inner rotor.

On the basis of any of the above embodiments, further, as shown in FIG. 1 , at least a part of the stator assembly 102 is located inside the rotor assembly 116 . That is, the present application proposes that the motor is a radial motor, the stator assembly 102 is an inner stator, and the rotor assembly 116 is an outer rotor.

On the basis of any of the above embodiments, further, as shown in FIG. 8 and FIG. 9 , the rotor assembly 116 further includes a rotor core 128 and a permanent magnet 130 . Wherein, the permanent magnet 130 is disposed on the rotor core 128 , and a plurality of permanent magnet poles are formed by the permanent magnet 130 .

Specifically, when at least a part of the rotor assembly 116 is located inside the stator assembly 102, the permanent magnets 130 can be placed on the outer surface of the rotor core 128, or placed inside the rotor core 128, such as V-shaped, spoke-shaped, etc.

Specifically, as shown in FIGS. 8 and 9 , permanent magnets 130 are retained on the inner surface of rotor core 128 when at least a portion of stator assembly 102 is located inside rotor assembly 116 . The permanent magnet pole can be composed of a plurality of permanent magnets 130 with two lateral edges and the inner surface and outer surface are roughly arc-shaped, and can also be an integrally formed magnetic ring. Optionally, the material of the permanent magnet 130 may be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

On the basis of any of the above embodiments, further, as shown in FIG. 8 , the permanent magnet 130 includes a plurality of arc-shaped permanent magnets 130 . Wherein, a plurality of arc-shaped permanent magnets 130 are distributed in a circular shape, and the polarities of two adjacent arc-shaped permanent magnets 130 are different. Specifically, as shown in FIG. 10 , FIG. 11 and FIG. 12 , the number of magnetic poles of each arc-shaped permanent magnet 130 is 1, 2 or 4, and the polarities of adjacent magnetic poles are alternately different.

On the basis of any of the above embodiments, further, as shown in FIG. 9 , the permanent magnet 130 includes an integral annular permanent magnet 130 . At this time, when the annular permanent magnet 130 has a plurality of magnetic poles, the number of permanent magnets 130 can be reduced, the process time for installing the permanent magnets 130 can be reduced, and the manufacturing and assembly efficiency can be improved. Moreover, when the width of the magnetic poles is small, using one ring-shaped permanent magnet 130 to charge multiple poles can increase the width of the ring-shaped permanent magnet 130 and reduce the processing difficulty of the ring-shaped permanent magnet 130 .

On the basis of any of the above embodiments, further, the permanent magnet 130 may be an arc-shaped permanent magnet, and the number of magnetic poles of the arc-shaped permanent magnet is 2 or 4.

On the basis of any of the above embodiments, further, in the circumferential direction of the stator assembly 102, there are at least two auxiliary stator teeth 114 with different sizes (not shown in the figure). In this way, the distribution of air gap permeance can be changed, and some harmonics can be weakened, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, more harmonic components are introduced into the air-gap flux density; and, when the permanent magnet magnetomotive force interacts with the air-gap flux density containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two auxiliary stator teeth 114 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.

The thirteenth embodiment of the present application proposes a motor, which generates and utilizes more working harmonics through the principle of magnetic field modulation, thereby increasing the output torque of the motor and improving the performance of the motor.

In this embodiment, as shown in FIG. 1 , the electric machine includes a stator assembly 102 and a rotor assembly 116 . The stator assembly 102 includes a stator core 104 and a stator winding, and the rotor assembly 116 includes a plurality of permanent magnet poles, and adjacent permanent magnet poles have different polarities; the stator assembly 102 and the rotor assembly 116 are concentrically arranged. During the operation of the motor, the rotor assembly 116 can cooperate with the stator assembly 102 and output torque. As shown in FIG. 2 , the stator core 104 includes a stator yoke 108 , a main stator tooth 110 and at least two auxiliary stator teeth 114 . The stator main tooth 110 is arranged on the stator yoke 108, and the dedendum of the stator main tooth 110 is connected with the stator yoke 108, and the tooth tip of the stator main tooth 110 is provided with a tooth shoe 112. In addition, the stator winding is arranged on the stator main tooth 110 , and the tooth shoe 112 can limit the stator winding to ensure that the stator winding is stably positioned on the stator main tooth 110 .

Specifically, the stator winding includes multiple coils, and each coil is only wound on one stator main tooth 110 . The rotor assembly 116 may be of ironcore or ironless construction. That is to say, the concentrated winding structure of single-tooth winding is adopted. At this time, the end of the motor winding is small, which is beneficial to reduce copper loss, facilitates modularization, and improves manufacturing efficiency.

Furthermore, as shown in FIG. 2 , at least two stator auxiliary teeth 114 are provided on the tooth shoe 112 , and grooves 118 are formed between adjacent stator auxiliary teeth 114 . Furthermore, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│. Wherein, a represents the number of stator main teeth 110 , x represents the number of stator auxiliary teeth 114 on each stator main tooth 110 , and Pr represents the number of pole pairs of a plurality of permanent magnet poles.

In this way, the motor proposed in the present application realizes the function of magnetic field modulation by using the auxiliary stator teeth 114 as modulation components. Moreover, under this design, the air-gap permeance is no longer a constant item, which introduces harmonic components. When the permanent magnet magnetomotive force interacts with the air-gap permeance containing harmonics, new harmonics will appear in the air-gap flux density. Wave components, so that the performance of the motor has been significantly improved. Moreover, the size of the groove 118 between two adjacent stator auxiliary teeth 114 in the circumferential direction of the stator assembly 102 is larger than that of the permanent magnet motor used in the related art, and the number of pole pairs Ps of the stator winding satisfies: Ps=│ ax±Pr│. Under this limitation, the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.

In this embodiment, further, as shown in FIG. 2 , there is a notch 122 between two adjacent tooth shoes 112 , and the notch 122 communicates with the stator slot 120 ; and, in the circumferential direction of the stator assembly 102 , The size of the notch 122 is not equal to the size of the groove 118 (more specifically, the size of the groove 118 is larger than the size of the notch 122). In this way, the uniformity of the distribution of the auxiliary teeth on the circumference is changed, that is, the number of cycles of the air gap permeance is reduced. When the number of air-gap permeance cycles decreases, the flux density harmonic components generated by modulation will increase, that is, more working harmonics will be generated, which will further increase the output torque of the motor.

Specifically, as shown in FIG. 2 , the shape of the groove 118 is square, trapezoidal, triangular, polygonal or arc-shaped. By adjusting the shape of the groove 118 , the width of the magnetic circuit at the tooth shoe 112 can be changed to avoid local oversaturation of the tooth shoe 112 .

In this embodiment, further, as shown in FIG. 2 , among two adjacent stator auxiliary teeth 114 , between the tooth body bisector of one stator auxiliary tooth 114 and the tooth body bisector of the other stator auxiliary tooth 114 The formed angle β satisfies 1≦β/(2π/(ax))<1.4, where a represents the number of stator main teeth 110 and x represents the number of stator auxiliary teeth 114 on each stator main tooth 110 . In this way, the structure and distribution of the auxiliary stator teeth 114 can be further optimized, so that the amplitude of the harmonics generated by the motor modulation is relatively large, and the torque is relatively high, so as to further improve the working efficiency of the motor.

In this embodiment, further, as shown in FIG. 3 , FIG. 4 and FIG. 5 , the stator assembly 102 includes at least two stacked bodies 124, any stacked body 124 includes a yoke section 126 and a stator main tooth 110, and the stator assembly 102 includes at least two stacked bodies 124. The main teeth 110 are disposed on yoke sections 126 , and the yoke sections 126 of two adjacent stacks 124 are connected. The stator yoke 108 includes a plurality of yoke sections 126 . In this way, during the manufacturing process of the stator assembly 102 , workers can first perform operations such as winding on a single stack 124 , which is beneficial to reduce the difficulty of winding, thereby improving the working efficiency of winding and reducing material costs. In addition, the stacked body 124 can also be fixed by means of fixing parts, welding or injection molding, so as to further improve the structural stability of the spliced stacked body 124 .

In this embodiment, further, as shown in FIG. 6 , the main tooth body 106 of the stator main tooth 110 is detachably connected to the stator yoke 108 . In this way, during the manufacturing process of the stator assembly 102, the wire can be wound on the single stacked body 124 containing the stator main teeth 110 first, and then installed on the stator yoke 108. On the one hand, it is convenient for wire winding and improves the slot fullness of the motor. On the other hand, the circumferential width of the tooth shoe 112 can be increased, and the width of the notch 122 can be reduced, so as to avoid the influence of the too large notch 122 on the performance of the motor.

In this embodiment, further, as shown in FIG. 7 , the tooth shoe 112 is detachably connected to the main tooth body 106 of the stator main tooth 110 . In this way, during the manufacturing process of the stator assembly 102, the wire can be wound first on the single stacked body 124 containing the stator main teeth 110, and then the tooth shoe 112 can be installed. On the one hand, the circumferential width of the tooth shoe 112 can be increased, and the width of the notch 122 can be reduced, so as to avoid the influence of the too large notch 122 on the performance of the motor.

In this embodiment, further, the rotor assembly 116 is placed inside the stator assembly 102 , and the permanent magnets 130 forming permanent magnetic poles are placed on the outer surface or inside of the rotor core 128 . In addition, the rotor assembly 116 may also be placed outside the stator assembly 102 .

Specifically, as shown in FIG. 1, when the rotor assembly 116 is placed inside the stator assembly 102, the permanent magnets 130 forming permanent magnetic poles can be placed on the outer surface of the rotor iron core 128, or placed inside the iron core, such as V type, spoke type, etc.

Specifically, the permanent magnets 130 remain on the inner surface of the rotor core 128 when the rotor assembly 116 is placed on the outside of the stator assembly 102 . As shown in FIG. 8 and FIG. 9 , the permanent magnet pole can be composed of a plurality of permanent magnets 130 with two lateral edges and the inner and outer surfaces are roughly arc-shaped, or it can be an integrally formed magnetic ring. Optionally, the material of the permanent magnet 130 may be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

In this embodiment, further, as shown in FIG. 10, FIG. 11 and FIG. 12, when the permanent magnet poles are permanent magnets 130, the number of magnetic poles of each permanent magnet 130 is 1 or 2 or 4, and the adjacent magnetic poles Alternate polarity. When one permanent magnet 130 has multiple magnetic poles, the number of permanent magnets 130 can be reduced, the process time for installing the permanent magnets 130 can be reduced, and the manufacturing and assembly efficiency can be improved. Moreover, when the width of the magnetic pole is small, the way of charging multiple poles with one magnetic tile can increase the width of the magnetic tile and reduce the difficulty of processing the magnetic tile.

Therefore, in the motor proposed in this application, at least two stator auxiliary teeth 114 are provided on the tooth shoe 112 of the stator main tooth 110, and the stator auxiliary teeth 114 are used as modulation components to realize the function of magnetic field modulation, so that the air gap magnetic conductance The introduction of more harmonic components has significantly improved the performance of the motor. Furthermore, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│. Under this limitation, the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor. In addition, cocoa can change the distribution of air gap permeability and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, when the permanent magnet magnetomotive force interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density, which significantly improves the performance of the motor.

In the second aspect, the fourteenth embodiment of the present application provides an electrical device, including the motor according to any embodiment of the first aspect of the present application.

The electrical equipment proposed in this embodiment includes the motor of any one of the above embodiments. Therefore, it has all the beneficial effects of the above motor, and will not be discussed in detail here.

In this embodiment, further, the electrical equipment proposed in this embodiment may be products such as refrigerators, washing machines, and air conditioners.

The third aspect of the present application proposes a stator assembly 102, as shown in FIG. One end of 106 is connected to the stator yoke 108, and the tooth shoe 112 is connected to the other end of the main tooth body 106. The end of the tooth shoe 112 away from the main tooth body 106 is provided with at least two stator auxiliary teeth 114. The end of the sub-tooth 114 is provided with a spline surface 136; wherein, from the first end of the tooth shoe 112 to the second end of the tooth shoe 112, at least a part of the spline surface 136 to the center of the stator yoke 108 The distance gradually increases or decreases.

The stator assembly 102 proposed in this application includes a stator yoke 108 and a stator main tooth 110 disposed on the stator yoke 108, wherein the stator main tooth 110 includes a main tooth body 106 and a tooth shoe 112, and the main tooth body 106 One end of the stator yoke is connected to the stator yoke 108, and the tooth shoe 112 is connected to the other end of the main tooth body 106, so as to realize the connection between the stator main tooth 110 and the stator yoke 108, and then it can be set on the stator main tooth 110 The windings are used to cooperate with the magnetic field of the permanent magnet 130 of the rotor assembly 116 when energized, so as to realize the rotation of the motor rotor.

Further, at least two auxiliary stator teeth 114 are provided at the end of the tooth shoe 112 away from the tooth body 106 of the main tooth. Through the arrangement of at least two, on the one hand, the at least two auxiliary stator teeth 114 can be used as magnetically conductive components for magnetic conduction. , on the one hand, at least two auxiliary stator teeth 114 can also be used as modulation components to realize the function of magnetic field modulation. More harmonic components are introduced into the air gap permeance, so that the performance of the motor is significantly improved.

Further, from the first end of the tooth shoe 112 to the second end of the tooth shoe 112 , the distance between at least a part of the spline surface 136 and the center of the stator yoke 108 gradually increases or decreases. In this way, the distribution of air gap permeance can be changed, so that the number of air gap permeance cycles decreases. When the number of air gap permeance cycles decreases, the harmonic components of magnetic density generated by modulation will increase, that is, more working harmonics will be generated. wave, the output torque of the motor will further increase.

In the stator assembly 102 provided in the present application, at least two stator secondary teeth 114 are arranged on the tooth shoe 112 of the stator main tooth 110, and from the first end of the tooth shoe 112 to the second end of the tooth shoe 112, the spline surface 136 The distance between at least a portion of the stator yoke 108 and the center of the stator yoke 108 gradually increases or decreases. On the basis of achieving an uneven air gap between the stator assembly 102 and the rotor to improve the waveform of the air gap magnetic field, reduce the cogging torque and torque ripple of the motor, and improve the reliability of the motor, it can also be changed The distribution of air gap permeance reduces the number of air gap permeance cycles, so that the harmonic components of flux density generated by modulation will increase, generate more working harmonics, and further increase the output torque of the motor.

In the above embodiment, further, as shown in FIG. 19 , the spline surface 136 includes: a main spline surface 164 arranged at one end of the main tooth body 106; a secondary spline surface 138 connected to the main spline surface 164 , from the first end of the tooth shoe 112 to the second end of the tooth shoe 112 , the distance between the sub-spline surface 138 and the center of the stator yoke 108 gradually increases or decreases.

In this embodiment, the spline surface 136 may include a main spline surface 164 and a sub-spline surface 138, wherein the main spline surface 164 is arranged at one end of the main tooth body 106, and the sub-spline surface 138 is connected to the main spline surface. The spline surface 164, and, from the first end of the tooth shoe 112 to the second end of the tooth shoe 112, the distance between the secondary spline surface 138 and the center of the stator yoke 108 gradually increases or decreases. Thus, the distance between at least a part of the spline surface 136 at the end of the stator auxiliary teeth 114 and the center of the stator yoke 108 gradually increases or decreases, thereby changing the distribution of the air gap permeance, so that the air gap permeance period When the number of air-gap permeance periods decreases, the harmonic components of flux density generated by modulation will increase, that is, more working harmonics will be generated, and the output torque of the motor will be further improved.

Further, from the first end of the tooth shoe 112 to the second end of the tooth shoe 112 , the distance between the main spline surface 164 and the center of the stator yoke 108 is constant.

Specifically, by setting the distance between the main spline surface 164 and the center of the stator yoke 108 to remain constant, so as to cooperate with the setting of the secondary spline surface 138, when the stator assembly 102 is mated with the rotor assembly 116, the stator An inhomogeneous air gap can be formed between the stator auxiliary teeth 114 of the assembly 102 and the rotor assembly 116, thereby improving the waveform of the air gap magnetic field, making the magnetic field formed by the permanent magnet 130 in the air gap closer to a sinusoidal shape, and reducing the motor's Cogging torque and torque ripple.

In any of the above embodiments, further, the sub-spline surface 138 includes at least the spline plane 132; and/or the sub-spline surface 138 includes at least the first spline surface 134; and/or the main spline surface 164 includes the first spline surface 134; Two-spline surfaces.

In this embodiment, the sub-spline surface 138 may include a spline plane 132, that is, the spline surface 136 at the end of the stator auxiliary tooth 114 includes at least a section of the spline plane 132. By setting the sub-spline surface 138 as a spline The plane 132 can ensure that the distance between the sub-spline surface 138 and the center of the stator yoke 108 can gradually increase or decrease from the first end of the tooth shoe 112 to the second end of the tooth shoe 112 . Then change the distribution of air gap permeance, so that the number of air gap permeance cycles decreases. When the number of air gap permeance cycles decreases, the harmonic components of magnetic density generated by modulation will increase, that is, more working harmonics will be generated. , the output torque of the motor will further increase. Further cooperate with the setting of the main spline surface 164, so that when the stator assembly is connected with the rotor assembly, an uneven air gap can be formed between the stator auxiliary teeth of the stator assembly and the rotor assembly, thereby improving the waveform of the air gap magnetic field, so that the permanent magnet The magnetic field formed in the air gap is more sinusoidal, which can reduce the cogging torque and torque ripple of the motor.

Further, the sub-spline surface 138 may also include the first spline surface 134 , that is, the spline surface 136 at the end of the auxiliary stator tooth 114 includes at least a segment of the first spline surface 134 . By setting the extension direction of the first spline surface 134, the distance between the sub-spline surface 138 and the center of the stator yoke 108 can also be gradually increased or decreased, so as to increase the output torque of the motor. And cooperate with the setting of the main spline surface 164 to achieve the purpose of reducing the cogging torque and torque ripple of the motor.

Further, the main spline surface 164 may include a second spline surface, specifically, viewed along the axial direction of the stator assembly, the extension direction of the second spline surface may be located on the concentric circle of the stator yoke 108, thereby ensuring the second The distance between the spline surface and the center of the stator yoke 108 is constant, that is, the distance between the main spline surface 164 and the center of the stator yoke 108 is constant. Furthermore, in conjunction with the setting of the secondary spline surface 138, when the stator assembly 102 is mated with the rotor assembly 116, an uneven air gap can be formed between the stator auxiliary teeth 114 of the stator assembly 102 and the rotor assembly 116, thereby improving the magnetic field of the air gap. The waveform makes the magnetic field formed by the permanent magnet in the air gap closer to sinusoidal, which can reduce the cogging torque and torque ripple of the motor.

Further, the main spline surface 164 includes a second spline surface, and at the same time, the sub-spline surface 138 includes both the spline plane 132 and the first spline surface 134, wherein the second spline surface is arranged on the main tooth At one end of the body 106 , the first spline surface 134 is connected to the second spline surface, and the spline plane 132 is connected to the first spline surface 134 . Alternatively, the spline plane 132 is connected to the second spline surface, and the first spline surface 134 is connected to the spline plane 132 .

In any of the above embodiments, further, the stator auxiliary teeth 114 include first stator auxiliary teeth 144 and second stator auxiliary teeth 146; the spline surface 136 includes a first spline surface 140 and a second spline surface 142, The first spline surface 140 is located on the first stator auxiliary tooth 144, and the second spline surface 142 is located on the second stator auxiliary tooth 146; wherein, the first spline surface 140 and the second spline surface 142 are about the main tooth The main tooth body bisector of body 106 is asymmetrical.

In this embodiment, the at least two sets of stator teeth 114 include a first set of stator teeth 144 and a second set of stator teeth 146 . Wherein, in the circumferential direction of the stator assembly 102, the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 are located at opposite ends of the tooth shoe 112, and the adjacent first stator auxiliary teeth 144 and the second stator auxiliary teeth The slots 122 are formed between the slots 146 . In addition, the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 can be used as magnetic field modulation components to improve the performance of the motor to which the stator assembly 102 is applied.

Further, the spline surface 136 includes a first spline surface 140 and a second spline surface 142, wherein the first spline surface 140 is located on the first stator auxiliary tooth 144, and the second spline surface 142 is located on the second stator surface 142. On the auxiliary tooth 146 , and the first spline surface 140 and the second spline surface 142 are asymmetrical with respect to the bisector of the main tooth body 106 of the stator main tooth 110 . Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, when the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two stator auxiliary teeth 114 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.

In any of the above embodiments, further, as shown in Fig. 18, Fig. 19 and Fig. 20, the number of stator main teeth 110 is multiple, and the plurality of stator main teeth 110 are distributed along the circumferential direction of the stator yoke 108; A stator slot 120 is provided between adjacent two main tooth bodies 106 , and a notch 122 is provided between adjacent two tooth shoes 112 , and the notch 122 communicates with the stator slot 120 .

In this embodiment, the number of stator main teeth 110 can be set in multiples, and the plurality of stator main teeth 110 are distributed along the circumferential direction of the stator yoke 108, thereby ensuring that the stator assembly 102 wound on the stator main teeth 110 The number of windings ensures that the magnetic field generated by the permanent magnet 130 can effectively cooperate with the windings during the operation of the motor to ensure the operating efficiency of the motor.

Specifically, there is a stator slot 120 between the main tooth body 106 of two adjacent stator main teeth 110, so that when the winding is wound on the main tooth body 106 of the stator main tooth 110, it can be accommodated in the stator slot 120, Ensure the rationality of the position of the stator slot 120, thereby ensuring the number of windings, and thus ensuring the operating efficiency of the motor.

Further, there is a notch 122 between two adjacent tooth shoes 112 , and the notch 122 communicates with the stator slot 120 . Through the setting of the notch 122, the starting torque of the motor can be reduced, the waveform of the air gap magnetic field can be improved, and additional loss can be reduced. And it is beneficial to adjust the harmonic amplitude of the air gap magnetic field and the eddy current density of the rotor, so as to ensure the stability of the motor during operation and reduce the eddy current loss. Specifically, the harmonic amplitude of the air-gap magnetic field and the eddy current density of the rotor can be adjusted by setting the width of the notch 122 to meet different operating requirements of the motor.

Further, there is a groove 118 between two adjacent stator auxiliary teeth 114 on the same stator main tooth 110; in the circumferential direction of the stator assembly 102, the size of the groove 118 is different from the size of the notch 122.

Specifically, on the same stator main tooth 110, there is a groove 118 between two adjacent stator auxiliary teeth 114, thereby separating the adjacent two stator auxiliary teeth 114, and also ensuring that the stator main tooth 110 is in contact with the rotor assembly. The inhomogeneity of the air gap between 116 can improve the waveform of the air gap magnetic field, so that the magnetic field formed by the permanent magnet 130 in the air gap is closer to the sinusoidal shape, so as to reduce the cogging torque and torque of the motor fluctuations to ensure the stability of the motor during operation.

Further, in the circumferential direction of the stator assembly 102, the size of the groove 118 between two adjacent stator secondary teeth 114 and the size of the notch 122 between the tooth shoes 112 of two adjacent stator main teeth 110 can be Set to not equal. Specifically, in the circumferential direction of the stator assembly 102 , the width of the groove 118 may be set to be unequal to the width of the notch 122 .

By setting the size of the groove 118 and the notch 122 to be unequal, the uniformity of the distribution of the stator auxiliary teeth 114 on all the stator main teeth 110 on the circumference can be changed, and the number of cycles of the air gap permeance is reduced. As the number of air-gap permeance cycles decreases, the flux density harmonic components generated by modulation will increase, so more working harmonics will be generated, which will further increase the output torque of the motor.

Specifically, the size of the groove 118 is greater than the size of the notch 122 in the circumferential direction of the stator assembly 102 . Specifically, in the circumferential direction of the stator assembly 102, the groove 118 between two adjacent stator auxiliary teeth 114 is d1, the size of the notch 122 is d2, and d1>d2 is satisfied.

In this way, the uniformity of the distribution of the stator auxiliary teeth 114 on the circumference will be changed, that is, the number of cycles of the air gap permeance will be reduced, and the number of pole pairs for each working harmonic of the air gap flux density is: |Pr±i×Zf| (i=0, 1, 2...), Zf is the number of air-gap permeance periods; when the air-gap permeance period decreases, the harmonic components of magnetic density generated by modulation will increase, which will generate more work Harmonics will further increase the output torque of the motor.

By setting the size of the groove 118 and the notch 122 to be unequal, the uniformity of the distribution of the stator auxiliary teeth 114 on all the stator main teeth 110 on the circumference can be changed, and the number of cycles of the air gap permeance is reduced. As the number of air-gap permeance cycles decreases, the flux density harmonic components generated by modulation will increase, so more working harmonics will be generated, which will further increase the output torque of the motor.

In any of the above-mentioned embodiments, further, as shown in FIG. 18 , among two adjacent stator main teeth 110 , the stator auxiliary teeth 114 of one stator main tooth 110 and the stator auxiliary teeth 114 of the other stator main tooth 110 There is a notch 122 between them; at the notch 122, the distance from the angle bisector of the angle between two adjacent stator main teeth 110 to two adjacent stator auxiliary teeth 114 is equal or different.

In this embodiment, the auxiliary stator teeth 114 on the teeth shoe 112 of the main stator teeth 110 can also be used as a modulating component in addition to being a magnetically conductive component, so as to realize the function of magnetic field modulation. Specifically, the distance from the angle bisector of two adjacent stator main teeth 110 to the first stator auxiliary tooth 144 and the second stator auxiliary tooth 146 can be set to be equal, so that the uniformity of the air gap magnetic field distribution can be ensured, which is beneficial to Stability of motor operation.

Further, on the basis of ensuring the stability of the motor operation, the distances from the angle bisectors of two adjacent stator main teeth 110 to the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 can also be set to be unequal, That is to say, the tooth shoe 112 or notch 122 shifts to one side of two adjacent stator main teeth 110, which can change the distribution of the air-gap magnetic field and weaken some harmonics in the air-gap magnetic field, thereby reducing the motor operating process. The torque ripple in the motor can improve the vibration and noise performance of the motor.

Further, the distance between the main tooth body bisector of the stator main tooth 110 and the two side walls of the groove 118 is equal. Thus, the groove 118 is located in the middle of the tooth shoe 112 in the circumferential direction of the stator assembly 102 . Such a design can simplify the overall structure of the stator main teeth 110 and facilitate the manufacturing of the stator main teeth 110 , thereby improving the processing efficiency of the stator assembly 102 and the entire motor. Specifically, in the circumferential direction of the stator assembly 102, the distances from the bisector of the main tooth body of the stator main tooth 110 to the two side walls of the groove 118 are d3 and d4 respectively, and d3 is equal to d4.

Further, the distance between the main tooth body bisector of the stator main tooth 110 and the two side walls of the groove 118 may also be different. In this way, in the circumferential direction of the stator assembly 102 , the groove 118 is offset toward one end of the tooth shoe 112 . Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor. Moreover, when the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two auxiliary stator teeth 114 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.

In any of the above embodiments, further, the stator assembly 102 includes at least two stacked bodies, any stacked body includes a yoke section and a stator main tooth 110, and the stator main tooth 110 is arranged on the yoke section, adjacent The yoke segments of the two stacks are connected, the stator yoke 108 comprising a plurality of yoke segments.

In this embodiment, the stator assembly 102 includes at least two stacked bodies, and the stator assembly 102 is manufactured by stacking at least two stacked bodies. In this way, during the manufacturing process of the stator assembly 102, workers can first perform operations such as winding on a single stack. Compared with the related art that needs to carry out the winding operation on the integral iron core, the operation space of the stacked body proposed by the present application is larger, which is beneficial to reduce the difficulty of winding, thereby improving the working efficiency of winding and reducing the cost of materials.

In addition, the present application can first perform operations such as winding on a single stacked body, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the motor to which the stator assembly 102 is applied. Moreover, on the basis of reducing the difficulty of winding, the present application can reduce the scrap rate during the winding process, thereby reducing scrap and improving the cost rate of the stator assembly 102 . In addition, the individual stacked body has lower requirements on materials, which can increase the utilization rate of iron core materials, thereby reducing the material cost of the stator assembly 102 .

Further, the yoke sections of two adjacent stacked bodies are detachably connected; the stator assembly 102 further includes a fixing member, and two adjacent stacked bodies are fixed by the fixing member.

Specifically, the yoke sections of two adjacent stacked bodies are detachably connected, thereby ensuring the disassembly and assembly of the two adjacent stacked bodies.

Specifically, the stator assembly 102 may include a first connection portion and a second connection portion. Wherein, the first connection part is arranged at the first end of the yoke section, the first connection part is arranged at the second end of the yoke section, and the first end and the second section are oppositely arranged on the yoke section. Moreover, the structures of the first connecting part and the second connecting part match, and the cooperation between the first connecting part and the second connecting part can realize self-locking. Therefore, in the process of splicing stacked bodies, the present application can connect two adjacent stacked bodies through the first connecting part and the second connecting part, including the detachable connection of two adjacent stacked bodies.

Further, one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion. In addition, the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function. Specifically, the recesses include, but are not limited to, the following structures: polygonal grooves, circular grooves, and elliptical grooves; the shape of the convex portion matches the shape of the concave portion.

Further, the stator assembly 102 further includes a fixing member, and two adjacent stacked bodies are fixed by the fixing member.

Specifically, after the splicing of two adjacent stacked bodies is completed, the overall structure is further fixed by a fixing member, thereby further improving the structural stability of the spliced stacked body. Specifically, the fixing member can use an insulating frame, so that the insulating frame can also fix the stacked body on the basis of ensuring insulation, thereby realizing the multi-purpose of the insulating frame.

Specifically, two adjacent stacked bodies are connected by welding. in. After the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of welding, thereby further improving the structural stability of the spliced stacked bodies.

Specifically, two adjacent stacked bodies are integrally injected. That is, after the splicing of two adjacent stacked bodies is completed, the present application further fixes the overall structure by means of integral injection molding, thereby further improving the structural stability of the spliced stacked bodies.

In any of the above-mentioned embodiments, further, as shown in FIG. 18 , among two adjacent stator auxiliary teeth 114, the main tooth body bisector of one stator auxiliary tooth 114 is aligned with the main tooth body bisector of the other stator auxiliary tooth 114. The included angle β is formed between the bisectors of the tooth bodies, and it satisfies 1≤β/(2π/(a×x))<1.4, where a represents the number of stator main teeth 110, and x represents the stator on each stator main tooth 110. The number of auxiliary teeth 114 .

In this embodiment, among two adjacent stator auxiliary teeth 114, the angle β formed between the main tooth body bisector of one stator auxiliary tooth 114 and the main tooth body bisector of the other stator auxiliary tooth 114 , and satisfy 1≦β/(2π/(ax))<1.4; wherein, a represents the number of stator main teeth 110 , and x represents the number of stator auxiliary teeth 114 on each stator main tooth 110 . In this way, the present application further optimizes the structure and distribution of the auxiliary stator teeth 114, so that the amplitude of the harmonic generated by applying the motor modulation is relatively large, and the torque is relatively high, so as to further improve the working efficiency of the motor.

Specifically, the stator auxiliary teeth 114 may only include the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 disposed at both ends of the tooth shoe 112, that is, the number of the stator auxiliary teeth 114 is two, and the stator main teeth 110 The number is 6, correspondingly, the included angle β between the main tooth body bisector of the first stator auxiliary tooth 144 and the main tooth body bisector of the second stator auxiliary tooth 146 satisfies 1≤β/(2π /(6×2))<1.4. In order to make the amplitude of the harmonics generated by the modulation of the motor applied with the stator assembly 102 larger and the torque higher, so as to further improve the working efficiency of the motor.

In any of the above embodiments, further, as shown in FIG. 21 and FIG. 22 , the tooth shoe 112 is detachably connected to the main tooth body 106; and/or the main tooth body 106 is detachably connected to the stator yoke 108 connect.

In this embodiment, a detachable connection between the main tooth body 106 of the stator main tooth 110 and the tooth shoe 112 can be set. A detachable connection may be provided, that is, a detachable sleeve assembly structure may be provided between the main tooth body 106 of the stator main tooth 110 , the stator yoke 108 and the tooth shoe 112 . Through the setting of the detachable sleeve assembly structure between the main tooth body 106, the tooth shoe 112 and the stator yoke 108, in the assembly process of the stator assembly 102, the main tooth body 106 of the stator main tooth 110 can be first Coils are wound on top, and then one end of the main tooth body 106 is connected to the stator yoke 108 , and finally the tooth shoe 112 is installed on the other end of the main tooth body 106 . Therefore, the simplified winding process in the assembly process of the stator assembly 102 is realized, the difficulty of winding is reduced, the slot filling rate of the winding is improved, the output performance of the motor is improved from the perspective of stator preparation, and waste materials and waste of materials can be reduced at the same time.

Specifically, the main tooth body 106 of the stator main tooth 110 and the stator yoke 108 can be connected through a concave-convex structure, that is, a groove 118 or a protrusion is provided at one end of the main tooth body 106 of the stator main tooth 110, Correspondingly, the corresponding position of the stator yoke 108 is provided with the groove 118 or the protrusion or the groove 118 that cooperates with the protrusion, so that the main teeth of the stator 110 can be realized through the cooperation of the groove 118 and the protrusion. 106 to the connection between the stator yoke 108 .

Correspondingly, the tooth body 106 of the main tooth and the tooth shoe 112 can also be connected through a concave-convex structure, that is, the connection between the tooth shoe 112 and the tooth body 106 of the main tooth is made through a protrusion and a groove 118 that cooperate with each other, so as to Realize the simplification of the winding process.

Further, the stator assembly 102 also includes a winding, and the winding includes a plurality of coils, and each coil is arranged on a stator main tooth 110 .

Specifically, the stator assembly 102 further includes a winding, and the winding includes a plurality of coils. Specifically, the coil is wound on the stator main tooth 110 to ensure the output torque when the motor using the stator assembly 102 is running.

Furthermore, each coil is only wound on one stator main tooth 110, that is, a single-tooth winding concentrated winding structure is adopted. At this time, the end of the motor winding is small, which is beneficial to reduce copper loss, and facilitates modularization and improves production. manufacturing efficiency.

According to the fourth aspect of the present application, as shown in FIG. 23 and FIG. 24 , a motor 156 is proposed, including: a rotor assembly 116; a stator assembly 102 as in any one of the above embodiments, at least a part of the stator assembly 102 is located Inside the rotor assembly 116.

In the motor 156 provided by the present application, at least a part of the stator assembly 102 is located in the rotor assembly 116, specifically, the stator assembly 102 and the rotor assembly 116 are concentrically arranged to ensure that the rotor assembly 116 can rotate relative to the stator assembly 102, so as to realize the motor 156 PTO. Wherein, a part of the stator assembly 102 is located in the rotor assembly 116, and the stator assembly 102 can also be arranged in the rotor assembly 116 as a whole in the axial direction, so as to realize the difference between the permanent magnet 130 of the rotor assembly 116 and the winding of the stator assembly 102 Matching method.

Furthermore, the motor 156 provided in the present application includes the stator assembly 102 according to the first aspect of the present application. Therefore, all the beneficial effects of the above-mentioned stator assembly 102 are available, and will not be discussed in detail here.

In any of the above embodiments, further, there is a first air gap 148 between the auxiliary stator teeth 114 and the rotor assembly 116; from the first end of the tooth shoe 112 to the second end of the tooth shoe 112, the first air gap 148 At least a portion of the radial dimension gradually increases or decreases.

In this embodiment, the radial dimension of at least a portion of the first air gap 148 is set to gradually increase or decrease from the first end of the tooth shoe 112 to the second end of the tooth shoe 112 . On the basis of realizing the formation of an uneven air gap between the stator assembly and the rotor to improve the waveform of the air gap magnetic field, reduce the cogging torque and torque ripple of the motor, and improve the reliability of the motor, the air gap can also be changed. The distribution of gap permeance reduces the number of air gap permeance periods, so that the harmonic components of flux density generated by modulation will increase, and more working harmonics will be generated to further increase the output torque of the motor.

It can be understood that the radial dimension of the first air gap 148 is the distance between the stator assembly 102 and the rotor assembly 116 in the radial direction of the stator assembly 102 .

In any of the above embodiments, further, from the first end of the tooth shoe 112 to the second end of the tooth shoe 112, the radial direction of the part of the first air gap 148 between the sub-spline surface 138 and the rotor assembly 116 gradually increasing or decreasing in size; and/or from the first end of the tooth shoe 112 to the second end of the tooth shoe 112, the radial direction of the portion of the first air gap 148 between the main spline surface 164 and the rotor assembly 116 Dimensions do not change.

In this embodiment, the spline surface 136 at the end of the stator secondary teeth 114 may at least include the secondary spline surface 138, and the radial direction of the part of the first air gap 148 between the secondary spline surface 138 and the rotor assembly 116 The size increases or decreases gradually, so that the radial size of at least a part of the first air gap 148 is set to increase or decrease gradually. On the basis that an uneven air gap can be formed between the stator assembly 102 and the rotor assembly 116 to improve the waveform of the air gap magnetic field, reduce the cogging torque and torque ripple of the motor 156, and improve the reliability of the motor 156 , the distribution of the air gap permeance can also be changed, so that the number of air gap permeance periods decreases, so that the harmonic components of the flux density generated by the modulation will increase, generate more working harmonics, and further increase the output torque of the motor 156 .

Further, the spline surface 136 at the end of the auxiliary stator tooth 114 may also include a main spline surface 164, and, from the first end of the tooth shoe 112 to the second end of the tooth shoe 112, between the main spline surface 164 and the rotor The radial dimension of the portion of the first air gap 148 between the components 116 does not change. When the stator assembly 102 is mated with the rotor assembly 116, the first air gap 148 formed between the stator auxiliary teeth 114 of the stator assembly 102 and the rotor assembly 116 is an uneven air gap, thereby improving the magnetic field of the first air gap 148 The waveform makes the magnetic field formed by the permanent magnet 130 in the first air gap 148 closer to a sinusoidal shape, which can reduce the cogging torque and torque ripple of the motor 156 .

Further, the spline surface 136 at the end of the auxiliary stator tooth 114 can include the main spline surface 164 and the secondary spline surface 138, so that the torque output by the motor 156 can be further improved, and the cogging of the motor 156 can also be reduced. Torque and torque ripple.

In any of the above embodiments, further, the first air gap 148 includes: a first sub-air gap 150 located between the first stator auxiliary teeth 144 and the rotor assembly 116; a second sub-air gap 152 located between the second Between the auxiliary stator teeth 146 and the rotor assembly 116 ; wherein, the first sub-air gap 150 and the second sub-air gap 152 are asymmetrical with respect to the main tooth body bisector of the main tooth body 106 .

In this embodiment, the at least two sets of stator teeth 114 include a first set of stator teeth 144 and a second set of stator teeth 146 . That is, the first air gap 148 includes a first sub-air gap 150 and a second sub-air gap 152, wherein the first sub-air gap 150 is located between the first stator secondary teeth 144 and the rotor assembly 116, and the second sub-air gap The gap 152 is located between the second stator set 146 and the rotor assembly 116 . Further, the first sub-air gap 150 and the second sub-air gap 152 are asymmetrical with respect to the main tooth body bisector of the main tooth body 106 . Such setting can change the distribution of air gap permeance and weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor 156 . Moreover, when the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. At this time, at least two stator auxiliary teeth 114 introduce more harmonic components into the air-gap permeance, so that the performance of the motor 156 is significantly improved.

In any of the above embodiments, further, the rotor assembly 116 includes: a rotor core 128; a permanent magnet 130 disposed on the rotor core 128, and the permanent magnet 130 forms a plurality of permanent magnet poles.

In this embodiment, the rotor assembly also includes a rotor core 128 and permanent magnets 130 . Wherein, the permanent magnet 130 is disposed on the rotor core 128 , and a plurality of permanent magnet poles are formed by the permanent magnet 130 .

Further, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│. Wherein, a represents the number of stator main teeth 110, x represents the number of stator auxiliary teeth 114 on each stator main tooth 110, and Pr represents the number of pole pairs of a plurality of permanent magnets 130. The new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor 156 to provide output torque for the motor 156 , thereby effectively improving the torque density of the motor 156 .

Specifically, when at least a part of the rotor assembly 116 is located inside the stator assembly 102, the permanent magnets 130 can be placed on the outer surface of the rotor core 128, or placed inside the rotor core 128, such as a V-shaped, spoke-shaped magnet arrangement way etc.

Specifically, the permanent magnets 130 are retained on the inner surface of the rotor core 128 when at least a portion of the stator assembly 102 is located inside the rotor assembly 116 . The permanent magnet pole can be composed of a plurality of permanent magnets 130 with two lateral edges and the inner surface and outer surface are roughly arc-shaped, and can also be an integrally formed magnetic ring. Optionally, the material of the permanent magnet 130 may be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

Further, the permanent magnet 130 includes a plurality of arc-shaped permanent magnets, the plurality of arc-shaped permanent magnets are distributed in a circular shape, and the polarities of two adjacent arc-shaped permanent magnets are different.

Further, as shown in FIG. 24 , the number of permanent magnets 130 may be multiple, the multiple permanent magnets 130 are distributed on the rotor core 128 , and the polarities of the multiple permanent magnets 130 are oppositely set. In addition, an included angle γ is formed between the center of the stator yoke 108 and the two ends of the permanent magnet 130. The existence of the included angle can further change the air gap permeance process, enhance the magnetic field modulation effect, and reduce the working subharmonic density. The amplitude of the increase, and then the torque of the motor 156 using the secondary rotor assembly 116 is further improved, thereby also avoiding the reduction in the number of magnetic poles after the use of alternating poles in the traditional permanent magnet motor 156, and the decline in the amplitude of the fundamental magnetic field, resulting in Torque drop problem.

Further, and satisfying 0.9<γ/(π/(Pr))<1.7, where Pr is the number of permanent magnets 130, when the included angle γ satisfies the above conditions, the rotor assembly 116 has good working performance.

Specifically, the permanent magnet 130 includes a plurality of arc-shaped permanent magnets. Wherein, a plurality of arc-shaped permanent magnets are distributed in a circular shape, and the polarities of two adjacent arc-shaped permanent magnets are different. Specifically, the number of magnetic poles of each arc-shaped permanent magnet is 1, 2 or 4, and the polarities of adjacent magnetic poles are alternately different.

Further, the permanent magnet 130 includes an integral annular permanent magnet. At this time, when the annular permanent magnet has multiple magnetic poles, the number of permanent magnets 130 can be reduced, the process time for installing the permanent magnets 130 can be reduced, and the manufacturing and assembly efficiency can be improved. Moreover, when the width of the magnetic poles is small, using one annular permanent magnet to fill multiple poles can increase the width of the annular permanent magnet and reduce the processing difficulty of the annular permanent magnet.

Specifically, the permanent magnets 130 may be arranged in a Halbach array.

Further, the rotor assembly 116 may include a plurality of salient poles, the plurality of salient poles protrude from the inner peripheral wall of the rotor core 128 , and the plurality of salient poles are distributed at intervals in the circumferential direction of the rotor core 128 . The plurality of permanent magnets 130 are respectively arranged between two adjacent salient poles, and the polarities of the plurality of permanent magnets 130 are the same. In this way, in the circumferential direction of the rotor core 128, a plurality of salient poles and a plurality of permanent magnets 130 are alternately distributed.

By arranging a plurality of permanent magnets 130 with the same polarity between two adjacent salient poles, a magnetic structure of alternating poles is produced on the rotor core 128 of the rotor assembly 116, so that the rotor core 128 is a salient pole. structure. In this way, the number of permanent magnets 130 used is reduced, and the manufacturing difficulty of the alternate-stage rotor is reduced, and the magnetic field modulation effect is enhanced, and the amplitude of the working sub-harmonic is increased, so that the motor has better output performance. Moreover, in the present application, a plurality of salient poles and a plurality of permanent magnets 130 are arranged alternately on the rotor core 128 of the rotor assembly 116, which also avoids the reduction in the number of magnetic poles and the decrease in the amplitude of the fundamental magnetic field after the use of alternating poles in the related art , leading to the problem of torque drop.

According to a fifth aspect of the present application, an electrical device is proposed, including the motor 156 according to any one of the embodiments of the fourth aspect above.

The electrical equipment provided by the present application includes the motor 156 of any one of the above-mentioned embodiments, wherein an uneven air gap can be formed between the stator assembly 102 and the rotor assembly 116 of the motor 156, which can improve the waveform of the air gap magnetic field, On the basis of reducing the cogging torque and torque fluctuation of the motor 156 and improving the reliability of the motor 156, it also ensures the uniformity of the magnetic field distribution of the motor 156 during operation and the stability of the motor 156 during operation. This ensures the stability of electrical equipment during operation.

Specifically, the electrical equipment may include an air conditioner, a washing machine, or a vacuum cleaner.

In the sixth aspect, as shown in FIG. 25 and FIG. 26 , the first embodiment of the present application proposes a stator assembly, including a stator core 104 and a winding. Wherein, the stator core 104 includes a stator yoke 108 and stator main teeth 110 disposed on the stator yoke 108 . The stator main tooth 110 includes a main tooth body 106 and a tooth shoe 112 ; the root of the main tooth body 106 is connected to the stator yoke 108 , and the tooth top of the main tooth body 106 is provided with a tooth shoe 112 . In addition, the winding is arranged on the stator main tooth 110, and the tooth shoe 112 can limit the winding to a certain extent, so as to ensure that the winding is stably placed on the stator main tooth 110.

Further, as shown in Fig. 25 and Fig. 26, in the stator assembly proposed by the present application, the tooth shoe 112 is provided with a first stator auxiliary tooth 144 and a second stator auxiliary tooth 146, and the first stator auxiliary tooth 144 and the second stator auxiliary tooth The two stator auxiliary teeth 146 are spaced apart on the tooth shoe 112 , and there is a groove 118 between the first stator auxiliary tooth 144 and the second stator auxiliary tooth 146 . In this way, the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 can not only serve as magnetically permeable components, but also serve as modulation components to realize the function of magnetic field modulation.

At this time, it is different from the conventional permanent magnet motor adopted in the related art (the slot opening is small, and the air gap permeance is close to constant). In the stator assembly proposed in the present application, the main stator teeth 110 are split into at least the first auxiliary stator teeth 144 and the second auxiliary stator teeth 146 , so that more harmonic components are introduced into the air gap permeance. In this way, the performance of the motor to which the stator assembly is applied is significantly improved.

Further, as shown in Fig. 1 and Fig. 2, in the stator assembly proposed by the present application, the tooth shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106, so that the tooth shoe 112 or the groove 118 faces One side of the main tooth body bisector of the main tooth body 106 is offset. In this way, the permeance distribution of the air gap can be changed to weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor to which the stator assembly is applied.

Therefore, as shown in Figures 1 and 2, in the stator assembly proposed by the present application, at least a first stator auxiliary tooth 144 and a second stator auxiliary tooth 146 are provided on the tooth shoe 112 of the stator main tooth 110, and then through the first The stator auxiliary teeth 144 and the second stator auxiliary teeth 146 are used as modulating components to realize the function of magnetic field modulation, so that more harmonic components are introduced into the air gap permeance, and the performance of the motor using the stator assembly is significantly improved. . Moreover, the tooth shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106, so that the tooth shoe 112 or the groove 118 is offset toward one side of the main tooth body bisector of the main tooth body 106, thereby Change the distribution of air gap permeance to weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor to which the stator assembly is applied.

The second embodiment of the present application proposes a stator assembly, on the basis of the first embodiment, further:

As shown in FIG. 26 , in the circumferential direction of the stator assembly, the distances from the two side walls of the groove 118 to the bisector of the main tooth body 106 of the main tooth body are not equal. That is, the groove 118 in the motor proposed by the present application is offset toward one side of the main tooth body bisector of the main tooth body 106 , so that the gear shoe 112 is different from the main tooth body bisector of the main tooth body 106 . Symmetrical setting.

In this way, the motor using the stator assembly can realize the magnetic field modulation effect, generate and use more working harmonics, thereby increasing the output torque of the motor. Moreover, the torque ripple can be reduced to improve the running stability of the motor to which the stator assembly is applied, and reduce the vibration and noise of the motor running.

In addition, it should be noted that, in this embodiment, at the notch 122, the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106, to the first stator The distance between the auxiliary teeth 144 and the second stator auxiliary teeth 146 may be equal or different. In this way, it can be ensured that the gear shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106 .

Specifically, as shown in FIG. 25 , the distance from the first side wall of the groove 118 to the bisector of the main tooth body 106 of the main tooth is d3, and the distance from the second side wall of the groove 118 to the main tooth body 106 is d3. The distance between the bisector of the tooth body of the main tooth is d4, and d3≠d4. Wherein, the first side wall is the side wall of the groove 118 close to the first stator auxiliary tooth 144 , and the second side wall is the side wall of the groove 118 close to the second stator auxiliary tooth 146 .

Specifically, as shown in FIG. 34 , in the stator assembly proposed by the present application, the distance from the first side wall of the groove 118 to the bisector of the main tooth body 106 of the main tooth body is d3, and the second side of the groove 118 The distance from the wall to the main tooth body bisector of the main tooth body 106 is d4, and d3≠d4, which can significantly weaken the harmonics, reduce the cogging torque of the motor, and improve the performance of the motor. Wherein, in FIG. 10, the abscissa represents the electric angle of the motor, the ordinate represents the cogging torque (Nm) of the motor, Q8 represents the relevant parameters when d3=d4, and Q9 represents the relevant parameters when d3≠d4.

The third embodiment of the present application proposes a stator assembly, on the basis of the first embodiment and the second embodiment, further:

In the circumferential direction of the stator assembly, the distances from both ends of the tooth shoe 112 to the bisector of the main tooth body 106 of the main tooth body are not equal. That is to say, the gear shoe 112 in the motor proposed by the present application is offset toward one side of the main tooth body bisector of the main tooth body 106, so that the tooth shoe 112 is different from the main tooth body bisector of the main tooth body 106. Symmetrical setting.

In this way, the motor using the stator assembly can realize the magnetic field modulation effect, generate and use more working harmonics, thereby increasing the output torque of the motor. Moreover, the torque ripple can be reduced to improve the running stability of the motor to which the stator assembly is applied, and reduce the vibration and noise of the motor running.

In addition, it should be noted that, in this embodiment, in the circumferential direction of the stator assembly, the distances from the two side walls of the groove 118 to the bisector of the main tooth body 106 of the main tooth body may be equal or different. In this way, it can be ensured that the gear shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106 .

Specifically, as shown in FIG. 25 , the distance from the first end of the tooth shoe 112 to the bisector of the main tooth body 106 is L3, and the second end of the tooth shoe 112 is to the main tooth of the main tooth body 106. The distance between the tooth body bisector is L4, and L3≠L4.

Specifically, as shown in FIG. 35 , in the stator assembly proposed by the present application, the distance from the first end of the tooth shoe 112 to the bisector of the main tooth body 106 of the main tooth body 106 is L3, and the second end of the tooth shoe 112 to The distance between the main tooth body bisector of the main tooth body 106 is L4, and L3≠L4, which can significantly weaken the harmonics, reduce the cogging torque of the motor, and improve the performance of the motor. 35, the abscissa represents the electric angle of the motor, the ordinate represents the cogging torque (Nm) of the motor, Q10 represents the relevant parameters when L3=L4, and Q11 represents the relevant parameters when L3≠L4.

The fourth embodiment of the present application proposes a stator assembly. On the basis of the first embodiment, the second embodiment and the third embodiment, further:

As shown in FIG. 25 , the number of stator main teeth 110 is at least two. Among the two adjacent stator main teeth 110, there is a notch 122 between the first stator auxiliary tooth 144 of one stator assembly and the second stator auxiliary tooth 146 of the other stator main tooth 110, and the notch 122 can be used for A worker winds the winding onto the main tooth body 106 of the stator main tooth 110 . In addition, at the notch 122, the angle bisector of the included angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106 reaches the first stator auxiliary tooth 144 and the second stator auxiliary tooth 146 The distances vary.

That is, in the motor proposed in this embodiment, the notch 122 is offset from the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106, so as to realize The tooth shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106 . In this way, the motor using the stator assembly can realize the magnetic field modulation effect, generate and use more working harmonics, thereby increasing the output torque of the motor. Moreover, the torque ripple can be reduced to improve the running stability of the motor to which the stator assembly is applied, and reduce the vibration and noise of the motor running.

In addition, it should be noted that, in this embodiment, the distances from the two side walls of the groove 118 to the bisector of the main tooth body 106 of the main tooth body may be equal or different. In this way, it can be ensured that the gear shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106 .

Specifically, as shown in FIG. 25 , the distance from the angle bisector of the included angle formed between the main tooth body bisectors of the two main tooth bodies 106 to the first stator auxiliary tooth 144 is L1, and the two main teeth The distance from the angle bisector of the included angle formed between the tooth body bisectors of the main teeth of the tooth body 106 to the second stator auxiliary tooth 146 is L2, and L1≠L2.

Specifically, as shown in FIG. 36 , the distance from the bisector of the angle formed between the bisectors of the main teeth of the two main teeth 106 to the first stator auxiliary tooth 144 is d5, and the two main teeth The distance between the angle bisector of the angle formed between the main tooth body bisectors of the tooth body 106 and the second stator auxiliary tooth 146 is d6, and d5≠d6, which can significantly weaken the harmonics and make the cogging rotation of the motor The torque is reduced and the performance of the motor is improved. Wherein, in FIG. 36, the abscissa represents the electrical angle of the motor, the ordinate represents the cogging torque (Nm) of the motor, Q12 represents the relevant parameters when d5=d6, and Q13 represents the relevant parameters when d5≠d6.

The fifth embodiment of the present application proposes a stator assembly. On the basis of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, further:

As shown in FIGS. 25 and 26 , the slot 122 is unequal in size from the groove 118 in the circumferential direction of the stator assembly. In this way, the uniformity of the distribution of the stator auxiliary teeth (the stator auxiliary teeth at least include the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146) on the circumference will be changed, that is, the number of cycles of the air gap permeance will be reduced, while the air gap Each working harmonic of the gap magnetic density is the number of pole pairs: |Pr±i×Zf|(i=0, 1, 2...), Zf is the number of air gap permeance cycles; when the number of air gap permeance cycles decreases After that, the flux density harmonic components generated by modulation will increase, that is, more working harmonics will be generated, which will further increase the output torque of the motor.

In this embodiment, further, as shown in FIGS. 25 and 26 , in the circumferential direction of the stator assembly, the size of the notch 122 is smaller than the size of the groove 118 . In this way, the present application further optimizes the distribution of the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 on the circumference, and further reduces the number of cycles of the air-gap magnetic permeance, so that more working harmonics are generated, so that The output torque of the motor will be further improved.

Specifically, as shown in FIG. 25 and FIG. 26 , in the circumferential direction of the stator assembly, the size of the notch 122 is d2, and in the circumferential direction of the stator assembly, the size of the groove 118 is d1; and d1<d2 is satisfied.

Specifically, as shown in FIG. 37, in the stator assembly proposed by the present application, in the circumferential direction of the stator assembly, the size of the notch 122 is d2, and in the circumferential direction of the stator assembly, the size of the groove 118 is d1, and Satisfying d2<d1 can significantly weaken the harmonics, reduce the cogging torque of the motor, and improve the performance of the motor. Specifically, in Fig. 37, the abscissa represents the number of times, the ordinate represents the no-load air-gap magnetic density ramp-T, the filled bars represent the relevant parameters when d2≠d1, and the blank bars represent the parameters when d2=d1 Related parameters. As shown in Figure 13, after d2≠d1, the number of periods of the air-gap permeance is reduced, and the number of working harmonics of the air-gap flux density is: |Pr±i×Zf|(i=0,1 , 2...), Zf is the period number of air gap permeance; when the number of air gap permeance period decreases, the harmonic component of flux density generated by modulation will increase. Such as 4/8/16 harmonics.

Specifically, as shown in FIG. 38, in the circumferential direction of the stator assembly, the size of the notch 122 is d2, and in the circumferential direction of the stator assembly, the size of the groove 118 is d1, and d2<d1 is satisfied, which can significantly weaken the Harmonics, and reduce the cogging torque of the motor, improving the performance of the motor. In Fig. 38, the abscissa represents the electrical angle of the motor, the ordinate represents the no-load back EMF-V, Q14 represents the relevant parameters when d2=d1, and Q15 represents the relevant parameters when d2≠d1; as shown in Fig. 38, the present application The output back electromotive force of the medium motor will be further increased, thereby increasing the torque.

The sixth embodiment of the present application proposes a stator assembly, on the basis of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment, further :

As shown in Fig. 25 and Fig. 26, the angle β formed between the main tooth body bisector of the first stator auxiliary tooth 144 and the main tooth body bisector of the second stator auxiliary tooth 146 satisfies: 1≤β/(2π/ (ax))<1.4, where a represents the number of stator main teeth 110, x represents the number of stator auxiliary teeth on each stator main tooth 110, and the stator auxiliary teeth include first stator auxiliary teeth 144 and second stator auxiliary teeth 146.

In this way, the present application further optimizes the structure and distribution of the auxiliary teeth of the stator, so that the harmonic amplitude generated by the modulation of the motor using the stator assembly is larger and the torque is higher, so as to further improve the working efficiency of the motor.

Specifically, as shown in FIG. 39 , in the stator assembly proposed by the present application, the angle β formed between the bisector of the main tooth body of the first stator auxiliary tooth 144 and the bisector of the main tooth body of the second stator auxiliary tooth 146 satisfies : 1≤β/(2π/(ax))<1.4, which can significantly improve the efficiency of the motor, making the efficiency advantage of the motor more obvious. Wherein, the abscissa in FIG. 39 represents the value of β/(2π/(ax)), the ordinate represents the motor efficiency, and the curve Q16 represents the relevant parameters of the motor efficiency.

The seventh embodiment of the present application proposes a stator assembly, in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment and the sixth embodiment On the basis of further:

As shown in FIG. 27 , FIG. 28 and FIG. 29 , the stator core 104 includes at least two stacked bodies 124 , and the stator core 104 is manufactured by stacking at least two stacked bodies 124 . In this way, during the manufacturing process of the stator core 104 , workers can first perform operations such as winding wires on a single stack 124 . Compared with the phase technology that needs to carry out the winding operation on the integral iron core, the stacked body 124 proposed in this application has a larger operating space, which is conducive to reducing the difficulty of winding, thereby improving the working efficiency of winding and reducing the cost of materials.

In addition, in the present application, operations such as winding can be performed on a single stack 124 first, which can effectively increase the number of windings, increase the slot fill rate of the windings, and improve the output performance of the applied motor. Moreover, on the basis of reducing the difficulty of winding, the present application can reduce the scrap rate during the winding process, thereby reducing scrap and improving the cost rate of the stator core 104 . In addition, the individual stacked body 124 has lower requirements on materials, which can increase the utilization rate of the iron core material, thereby reducing the material cost of the stator iron core 104 .

In this embodiment, further, as shown in FIG. 27 , FIG. 28 and FIG. 29 , the yoke sections 126 of two adjacent stacked bodies 124 are detachably connected, thereby ensuring the disassembly and assembly of two adjacent stacked bodies 124 . Specifically, the stator core 104 further includes a first connecting portion 166 and a second connecting portion 154 . Wherein, the first connecting portion 166 is arranged at the first end of the yoke section 126 , the first connecting portion 166 is arranged at the second end of the yoke section 126 , and the first end and the second section are on the yoke section 126 relative settings. Moreover, the structures of the first connecting portion 166 and the second connecting portion 154 are matched, and the cooperation between the first connecting portion 166 and the second connecting portion 154 can realize self-locking. Therefore, in the process of splicing the stacked bodies 124 , the present application can connect two adjacent stacked bodies 124 through the first connecting portion 166 and the second connecting portion 154 , including the detachable connection of the two adjacent stacked bodies 124 .

In this embodiment, further, as shown in FIG. 27 , FIG. 28 and FIG. 29 , one of the first connecting portion 166 and the second connecting portion 154 is a convex portion, and the other is a concave portion. In addition, the shape of the convex part matches the shape of the concave part, and the convex part and the concave part can be detachably connected, and have a self-locking function. Specifically, the recesses include, but are not limited to, the following structures: polygonal grooves, circular grooves, and elliptical grooves; the shape of the convex portion matches the shape of the concave portion.

In addition, as shown in FIGS. 28 and 29 , a single stack 124 may include one stator main tooth 110 , or may include two or more stator main teeth 110 .

The eighth embodiment of the present application proposes a stator assembly, on the basis of the seventh embodiment, further:

The stator assembly also includes a fastener (not shown). in. After the splicing of two adjacent stacked bodies 124 is completed, the present application further fixes the overall structure through a fixing member, thereby further improving the structural stability of the spliced stacked bodies 124 . Specifically, the fixing member can be an insulating frame, so that the insulating frame can also fix the stacked body 124 on the basis of ensuring insulation, realizing the multi-purpose of the insulating frame.

In addition, two adjacent stacked bodies 124 can also be connected by welding. in. After the splicing of two adjacent stacked bodies 124 is completed, the present application further fixes the overall structure by means of welding, thereby further improving the structural stability of the spliced stacked bodies 124 .

In addition, two adjacent stacked bodies 124 can also be integrally injected. That is, after the splicing of two adjacent stacked bodies 124 is completed, the present application further fixes the overall structure by integral injection molding, thereby further improving the structural stability of the spliced stacked bodies 124 .

The ninth embodiment of the present application proposes a stator assembly, in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment , on the basis of the seventh embodiment and the eighth embodiment, further:

As shown in FIG. 30 , the main tooth body 106 of the stator main tooth 110 is detachably connected to the stator yoke 108 . In this way, during the manufacturing process of the stator core 104, the wire can be wound on the single stacked body 124 containing the stator main teeth 110 first, and then installed on the stator yoke 108. On the one hand, it is convenient for wire winding and improves the slot fullness of the motor. On the other hand, the circumferential width of the tooth shoe 112 can be increased, and the width of the notch 122 can be reduced, so as to avoid the influence of the too large notch 122 on the performance of the motor.

The tenth embodiment of the present application proposes a stator assembly, in the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment , on the basis of the seventh embodiment, the eighth embodiment and the ninth embodiment, further:

As shown in FIG. 31 , the tooth shoe 112 is detachably connected to the main tooth body 106 of the stator main tooth 110 . In this way, during the manufacturing process of the stator core 104, the wire can be wound on the single stacked body 124 containing the stator main teeth 110 first, and then the tooth shoe 112 can be installed. On the one hand, the circumferential width of the tooth shoe 112 can be increased, and the width of the notch 122 can be reduced, so as to avoid the influence of the too large notch 122 on the performance of the motor.

On the basis of any of the above embodiments, further, as shown in FIG. 25 and FIG. 26 , the stator yoke 108 is ring-shaped. In addition, the dedendum of the stator main teeth 110 is connected to the outer peripheral wall of the stator yoke 108 . In this way, the stator assembly proposed in this application is an inner stator, which can be used in conjunction with an outer rotor to output torque.

On the basis of the above-mentioned embodiments, it should be noted that if the distances between the two side walls of the groove 118 and the bisector of the main tooth body 106 of the main tooth body are not equal in the circumferential direction of the stator assembly, then in the groove At the mouth 122, the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106, the distance to the first stator auxiliary tooth 144 and the second stator auxiliary tooth 146 can be equal You can also wait.

On the basis of the above-mentioned embodiments, it should be noted that if at the notch 122, the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106, to the first The distances between the auxiliary stator teeth 144 and the second auxiliary stator teeth 146 are different, so in the circumferential direction of the stator assembly, the distances between the two ends of the tooth shoe 112 and the bisector of the main tooth body 106 of the main tooth body are not equal.

Therefore, in the stator assembly 116 proposed in this application, it is only necessary to ensure that at least one of d5≠d6 and d3≠d4 exists.

In the seventh aspect, as shown in FIG. 32 , the eleventh embodiment of the present application provides a motor, including the stator assembly and the rotor assembly 116 of any embodiment of the sixth aspect above.

Therefore, the motor proposed in this embodiment has all the beneficial effects of the above-mentioned stator assembly, and will not be discussed in detail here.

In addition, as shown in FIGS. 32 and 33 , the electric machine also includes a rotor assembly 116 . Wherein, the rotor assembly 116 includes a rotor core 128 and a plurality of permanent magnets 130; the plurality of permanent magnets 130 are arranged on the rotor core 128, and are distributed at intervals in the circumferential direction of the rotor core 128, in addition, adjacent permanent magnets 130 polarities are different. During the operation of the motor, the rotor assembly 116 can cooperate with the stator assembly and output torque.

In this embodiment, at least a portion of the stator assembly may be located inside the rotor assembly 116 . At this time, the stator assembly is used as an inner stator, and the rotor assembly 116 is used as an outer rotor.

Additionally, as shown in FIGS. 32 and 33 , with at least a portion of the stator assembly inside the rotor assembly 116 , permanent magnets 130 are retained on the inner surface of the rotor core 128 . The permanent magnet pole can be composed of a plurality of permanent magnets 130 with two lateral edges and the inner surface and outer surface are roughly arc-shaped, and can also be an integrally formed magnetic ring. Optionally, the material of the permanent magnet 130 may be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

In this embodiment, it may be that at least a portion of the rotor assembly 116 is located inside the stator assembly. At this time, the rotor assembly 116 is used as a rotating stator, and the stator assembly is used as an outer stator.

In addition, when at least a part of the rotor assembly 116 is located inside the stator assembly, the permanent magnets 130 forming permanent magnet poles are placed on the outer surface or inside of the rotor core 128, or placed inside the core, such as V-shaped, spoke type etc.

The twelfth embodiment of the present application proposes a motor, on the basis of the eleventh embodiment, further:

The number of pole pairs Ps of the winding satisfies: Ps=│ax±Pr│, a represents the number of stator main teeth 110, x represents the number of stator auxiliary teeth on each stator main tooth 110, and Pr represents the pole pairs of a plurality of permanent magnets 130 , wherein the auxiliary stator teeth include first auxiliary stator teeth 144 and second auxiliary stator teeth 146 . Under this limitation, the new harmonic components appearing in the air-gap flux density can be used as the working harmonics of the motor to provide output torque for the motor, thus effectively improving the torque density of the motor.

The thirteenth embodiment of the present application proposes a stator assembly, which generates new working harmonics and uses them to generate torque through the principle of magnetic field modulation, and reduces the torque through the offset design of the tooth shoe 112 or the slot 122. Torque pulsation, improving vibration and noise performance.

In this embodiment, as shown in FIG. 25 and FIG. 26 , the stator assembly includes a stator core 104 and windings wound on the stator core 104; A plurality of stator main teeth 110 extending toward each other, and a stator slot 120 is formed between two adjacent stator main teeth 110; the winding includes a plurality of coils placed in the stator slot 120, and each coil is only wound on one stator main tooth 110 superior. A tooth shoe 112 is formed at one end of each stator main tooth 110 , and a notch 122 is formed between two adjacent tooth shoes 112 . First stator auxiliary teeth 144 and second stator auxiliary teeth 146 are distributed on both sides of the tooth shoe 112 in the circumferential direction, and a groove 118 is formed between the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 . Also, the tooth shoe 112 is asymmetrical with respect to the main tooth body bisector of the main tooth body 106 .

Further, as shown in Fig. 25 and Fig. 26, the tooth shoe 112 is asymmetrical with respect to the main tooth body bisector of the main tooth body 106, including but not limited to the following situations:

Case 1. As shown in FIG. 26 , in the circumferential direction of the stator assembly, the distances from the two side walls of the groove 118 to the bisector of the main tooth body 106 of the main tooth body are unequal (that is, d3≠d4). Moreover, at the notch 122, the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106 reaches the first stator auxiliary tooth 144 and the second stator auxiliary tooth 146 The distances are equal (that is, d5=d6).

Case 2: In the circumferential direction of the stator assembly, the distances from the two side walls of the groove 118 to the bisector of the main tooth body 106 of the main tooth body are not equal (that is, d3≠d4). Moreover, at the notch 122, the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106 reaches the first stator auxiliary tooth 144 and the second stator auxiliary tooth 146 The distances are not equal (that is, d5≠d6).

Case 3. As shown in FIG. 25 , in the circumferential direction of the stator assembly, the distances from both side walls of the groove 118 to the bisector of the main tooth body 106 of the main tooth body are equal (that is, L3 = L4 ). Moreover, at the notch 122, the angle bisector of the angle formed between the main tooth body bisectors of two adjacent main tooth bodies 106 reaches the first stator auxiliary tooth 144 and the second stator auxiliary tooth 146 The distances are not equal (that is, d5≠d6).

Through the above arrangement, the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 can also be used as modulating components in addition to being used as magnetically permeable components, so as to realize the function of magnetic field modulation. At this time, in the stator assembly of the present application, the stator main teeth 110 are at least divided into the first stator auxiliary teeth 144 and the second pair, and a large concave groove is formed between the first stator auxiliary teeth 144 and the second pair. The slot 118 makes more harmonic components be introduced into the air gap permeance. When the magnetomotive force of the permanent magnet interacts with the air-gap permeance containing harmonics, new harmonic components will appear in the air-gap flux density. Then design the winding according to this harmonic component, and the new harmonic component that appears in the air gap magnetic density can be used as the working harmonic of the motor to provide output torque for the motor, thereby effectively improving the torque density of the motor.

At this time, it is different from the conventional permanent magnet motor adopted in the related art (the slot opening is small, and the air gap permeance is close to constant). In the stator assembly proposed in the present application, the main stator teeth 110 are split into at least the first auxiliary stator teeth 144 and the second auxiliary stator teeth 146 , so that more harmonic components are introduced into the air gap permeance. In this way, the performance of the motor to which the stator assembly is applied is significantly improved.

Furthermore, in the stator assembly proposed in this application, each coil of the winding is only wound on one stator main tooth 110, that is, a single-tooth-wound concentrated winding structure is adopted. At this time, the end of the motor winding is small, which is conducive to reducing the Small copper consumption, and easy to achieve modularization, improve manufacturing efficiency.

Further, in the stator assembly proposed in the present application, the tooth shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106, specifically, the tooth shoe 112 or the notch 122 is arranged toward the main tooth body bisector. Offset on one side. Through the above design, the distribution of air gap permeance can be changed, and some harmonics can be weakened, thereby reducing torque ripple and improving the vibration and noise performance of the motor.

Therefore, in the stator assembly proposed in this application, at least the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146 are provided on the tooth shoes 112 of the stator main teeth 110, and then through the first stator auxiliary teeth 144 and the second stator The auxiliary teeth 146 are used as modulating components to realize the function of magnetic field modulation, so that more harmonic components are introduced into the air-gap permeance, so that the performance of the motor using the stator assembly is significantly improved. Moreover, the tooth shoe 112 is arranged asymmetrically with respect to the main tooth body bisector of the main tooth body 106, so that the tooth shoe 112 or the groove 118 is offset toward one side of the main tooth body bisector of the main tooth body 106, thereby Change the distribution of air gap permeance to weaken some harmonics, thereby reducing torque ripple and improving the vibration and noise performance of the motor to which the stator assembly is applied.

Moreover, the size of the notch 122 is not equal to the size of the groove 118, which will change the uniformity of the stator auxiliary teeth (the stator auxiliary teeth include at least the first stator auxiliary teeth 144 and the second stator auxiliary teeth 146) on the circumference, That is to say, the number of periods of the air-gap permeance is reduced, and the working harmonics of the air-gap magnetic density are pole pairs: |Pr±i×Zf|(i=0, 1, 2...), Zf is the air gap Permeance cycle number; when the air gap permeance cycle number decreases, the flux density harmonic component generated by modulation will increase, that is, more working harmonics will be generated, which will further increase the output torque of the motor.

As shown in FIG. 32 and FIG. 33 , the fourteenth embodiment of the present application provides a motor, including the stator assembly as provided in the thirteenth embodiment of the present application. Additionally, the electric machine includes a rotor assembly 116 disposed concentrically with the stator assembly.

In this embodiment, further, as shown in FIG. 33 , the rotor assembly 116 includes a rotor core 128 and a plurality of permanent magnets 130; the plurality of permanent magnets 130 are arranged on the rotor core 128, and on the They are distributed at intervals in the circumferential direction, and besides, the polarities of adjacent permanent magnets 130 are different. During the operation of the motor, the rotor assembly 116 can cooperate with the stator assembly and output torque.

In addition, the number of pole pairs Ps of the winding satisfies: Ps=│ax±Pr│, a represents the number of stator main teeth 110, x represents the number of stator auxiliary teeth on each stator main tooth 110, and Pr represents the number of permanent magnets 130 The number of pole pairs, wherein the auxiliary stator teeth include first auxiliary stator teeth 144 and second auxiliary stator teeth 146 . Under this design, after the Ps antipolar magnetic field of the stator is acted on by the modulation block, that is, the stator auxiliary teeth, a Pr antipolar magnetic field is generated, which has the same number of pole pairs as the rotor magnetic field, so that the magnetic field modulation can be realized, and the harmonics can be used to generate rotation. torque and improve motor performance.

In this embodiment, at least a portion of the stator assembly may be located inside the rotor assembly 116 . It is also possible that at least a portion of the rotor assembly 116 is located inside the stator assembly.

With at least a portion of the stator assembly inside the rotor assembly 116 , the permanent magnets 130 are retained on the inner surface of the rotor core 128 . The permanent magnet pole can be composed of a plurality of permanent magnets 130 with two lateral edges and the inner surface and outer surface are roughly arc-shaped, and can also be an integrally formed magnetic ring. Optionally, the material of the permanent magnet 130 may be ferrite, plastic magnet, rare earth permanent magnet or rubber magnetic strip.

In the case where at least a part of the rotor assembly 116 is located inside the stator assembly, the permanent magnets 130 forming the permanent magnetic poles are placed on the outer surface or inside of the rotor core 128, or placed inside the iron core, such as V-shaped, spoke-shaped, etc. .

In an eighth aspect, the fifteenth embodiment of the present application provides an electrical device (not shown in the figure), including the motor as in the above embodiment.

The electrical equipment proposed in this embodiment includes the motor as in the above embodiment. Therefore, it has all the beneficial effects of the electric motor in the seventh aspect above, and will not be discussed in detail here.

Specifically, the electrical equipment proposed in this embodiment may be products such as refrigerators, washing machines, and air conditioners.

In this application, the term "plurality" means two or more, unless otherwise clearly defined. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in this application In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (50)

1. A motor, including:

   A stator assembly, the stator assembly includes a stator core and a stator winding, the stator core includes:

   stator yoke;

   The stator main teeth are arranged on the stator yoke, the stator main teeth include tooth shoes, and the stator windings are arranged on the stator main teeth;

   At least two auxiliary stator teeth are arranged on the tooth shoe;

   a rotor assembly, the rotor assembly includes a plurality of permanent magnet poles, and the polarities of adjacent permanent magnet poles are different;

   Wherein, the number of pole pairs Ps of the stator winding satisfies: Ps=│ax±Pr│, a represents the number of stator main teeth, x represents the number of the stator auxiliary teeth on each of the stator main teeth, and Pr represents the The number of pole pairs of the plurality of permanent magnet poles.
2. The electric machine according to claim 1, wherein,

   The at least two stator auxiliary teeth are distributed at intervals on the stator yoke, and grooves are formed between adjacent two stator auxiliary teeth.
3. The electric machine according to claim 2, wherein,

   There is a stator slot between two adjacent stator main teeth, and the stator winding is located in the stator slot;

   There is a notch between two adjacent tooth shoes, and the notch communicates with the stator slot;

   Wherein, the stator winding includes a plurality of coils, and each coil is wound on one main tooth of the stator.
4. The electric machine according to claim 3, wherein,

   The size of the notch is different from the size of the groove; and/or

   The groove is a polygonal groove or an arc groove.
5. The electric machine according to claim 3, wherein,

   The distance from the tooth body bisector of the main teeth of the stator to the two side walls of the groove is equal or different.
6. The electric machine according to claim 3, wherein,

   Among the two adjacent stator main teeth, there is the notch between the stator auxiliary teeth of one stator main tooth and the stator auxiliary teeth of the other stator main tooth;

   At the notch, the distances from the angle bisectors of two adjacent stator main teeth to two adjacent stator auxiliary teeth are equal or unequal.
7. An electric machine according to any one of claims 1 to 6, wherein,

   Among the two adjacent stator auxiliary teeth, the angle β formed between the tooth body bisector of one stator auxiliary tooth and the tooth body bisector of the other stator auxiliary tooth satisfies 1≤β/(2π /(ax))<1.4, wherein, a represents the number of the stator main teeth, and x represents the number of the stator auxiliary teeth on each of the stator main teeth.
8. An electric machine according to any one of claims 1 to 6, wherein,

   The stator assembly includes at least two stacked bodies, any of the stacked bodies includes a yoke section and a stator main tooth, and the stator main tooth is arranged on the yoke section, and two adjacent stacked bodies The yoke segments are connected, and the stator yoke includes a plurality of the yoke segments.
9. The electric machine according to claim 8, wherein,

   The yoke sections of two adjacent stacked bodies are detachably connected;

   The stator assembly further includes a fixing member, through which two adjacent stacked bodies are fixed; and/or

   Two adjacent stacks are connected by welding; and/or

   Two adjacent stacked bodies are integrally injected.
10. An electric machine according to any one of claims 1 to 6, wherein,

    The main tooth body of the stator main tooth is detachably connected to the stator yoke; and/or

    The tooth shoe is detachably connected to the main tooth body of the stator main tooth.
11. An electric machine according to any one of claims 1 to 6, wherein,

    at least a portion of the stator assembly is located inside the rotor assembly; or

    At least a portion of the rotor assembly is located inside the stator assembly.
12. The electric machine according to any one of claims 1 to 6, wherein the rotor assembly further comprises:

    rotor core;

    A permanent magnet is arranged on the rotor iron core, and the permanent magnet forms the plurality of permanent magnet poles.
13. The electric machine according to claim 12, wherein,

    The permanent magnet includes a plurality of arc-shaped permanent magnets, the plurality of arc-shaped permanent magnets are distributed in a ring shape, and the polarities of two adjacent arc-shaped permanent magnets are different; or

    The permanent magnet includes an integral annular permanent magnet.
14. The electric machine according to claim 12, wherein,

    The permanent magnet includes a plurality of arc-shaped permanent magnets, and the number of magnetic poles of the arc-shaped permanent magnets is 2 or 4.
15. An electric machine according to any one of claims 1 to 6, wherein,

    In the circumferential direction of the stator assembly, there are at least two stator auxiliary teeth with unequal sizes.
16. An electrical device, comprising:

    An electric machine as claimed in any one of claims 1 to 15.
17. A stator assembly, comprising:

    stator yoke;

    Stator main teeth, the stator main teeth include a main tooth body and a tooth shoe, one end of the main tooth body is connected to the stator yoke, and the tooth shoe is connected to the other end of the main tooth body connect,

    The end of the tooth shoe away from the main tooth body is provided with at least two stator auxiliary teeth, and the end of any of the stator auxiliary teeth is provided with a spline surface;

    Wherein, from the first end of the tooth shoe to the second end of the tooth shoe, the distance from at least a part of the spline surface to the center of the stator yoke gradually increases or decreases.
18. The stator assembly of claim 17, wherein said spline surface comprises:

    The main spline surface is arranged at one end of the main tooth body;

    a secondary spline surface, connected to the main spline surface, from the first end of the tooth shoe to the second end of the tooth shoe, the distance between the secondary spline surface and the center of the stator yoke The distance gradually increases or decreases.
19. The stator assembly of claim 18, wherein:

    The distance between the main spline surface and the center of the stator yoke is constant from the first end of the tooth shoe to the second end of the tooth shoe.
20. The stator assembly of claim 18, wherein:

    The sub-spline surface includes at least a spline plane; and/or

    The sub-spline surface includes at least a first spline surface; and/or

    The primary spline surface includes a secondary spline surface.
21. A stator assembly according to any one of claims 17 to 20, wherein:

    The at least two sets of stator teeth comprise a first set of stator teeth and a second set of stator teeth;

    The spline surface includes a first spline surface and a second spline surface, the first spline surface is located on the teeth of the first stator pair, and the second spline surface is located on the second stator pair teeth;

    Wherein, the first spline surface and the second spline surface are asymmetric with respect to the main tooth body bisector of the main tooth body.
22. A stator assembly according to any one of claims 17 to 20, wherein:

    The number of the stator main teeth is multiple, and the plurality of stator main teeth are distributed along the circumferential direction of the stator yoke;

    There is a stator slot between two adjacent main tooth bodies, and there is a notch between two adjacent tooth shoes, and the notch communicates with the stator slot.
23. The stator assembly of claim 22, wherein:

    There is a groove between two adjacent stator auxiliary teeth on the same stator main tooth;

    In the circumferential direction of the stator assembly, the size of the groove is different from the size of the notch.
24. The stator assembly of claim 23, wherein:

    Among the two adjacent stator main teeth, there is the notch between the stator auxiliary teeth of one of the stator main teeth and the stator auxiliary teeth of the other stator main tooth;

    At the notch, the distances from the angle bisectors of two adjacent stator main teeth to two adjacent stator auxiliary teeth are equal or unequal.
25. A stator assembly according to any one of claims 17 to 20, wherein:

    The stator assembly includes at least two stacked bodies, any one of the stacked bodies includes a yoke section and the stator main teeth, and the stator main teeth are arranged on the yoke section, adjacent to the two The yoke segments of the stack are connected, the stator yoke comprising a plurality of the yoke segments.
26. The stator assembly of claim 25, wherein:

    The yoke sections of two adjacent stacked bodies are detachably connected;

    The stator assembly further includes a fixing piece through which two adjacent stacked bodies are fixed.
27. A stator assembly according to any one of claims 17 to 20, wherein:

    Among the two adjacent stator auxiliary teeth, an included angle β is formed between the main tooth body bisector of one stator auxiliary tooth and the main tooth body bisector of the other stator auxiliary tooth, and satisfies 1 ≤β/(2π/(a×x))<1.4, wherein, a represents the number of the main stator teeth, and x represents the number of auxiliary stator teeth on each of the main stator teeth.
28. A stator assembly according to any one of claims 17 to 20, wherein:

    The tooth shoe is detachably connected to the tooth body of the main tooth; and/or

    The tooth body of the main tooth is detachably connected to the stator yoke.
29. A stator assembly according to any one of claims 17 to 20, further comprising:

    A winding, the winding includes a plurality of coils, each of which is wound on one main tooth of the stator.
30. A motor, including:

    rotor assembly;

    A stator assembly as claimed in any one of claims 17 to 29, at least part of which is located within said rotor assembly.
31. An electric machine according to claim 30, wherein:

    There is a first air gap between the stator auxiliary teeth and the rotor assembly;

    At least a portion of the first air gap gradually increases or decreases in radial dimension from the first end of the tooth shoe to the second end of the tooth shoe.
32. An electric machine according to claim 31, wherein,

    From the first end of the tooth shoe to the second end of the tooth shoe, the radial dimension of the part of the first air gap located between the sub-spline surface and the rotor assembly gradually increases or decreases; and / or

    From the first end of the tooth shoe to the second end of the tooth shoe, the radial dimension of the part of the first air gap between the main spline surface and the rotor assembly is constant.
33. The electric machine of claim 32, wherein said first air gap comprises:

    a first sub-air gap located between the first stator secondary teeth and the rotor assembly;

    a second sub-air gap between the second stator set and the rotor assembly;

    Wherein, the first sub-air gap and the second sub-air gap are asymmetrical with respect to the main tooth body bisector of the main tooth body.
34. An electric machine according to any one of claims 30 to 33, wherein the rotor assembly comprises:

    rotor core;

    The permanent magnet is arranged on the rotor iron core, and the permanent magnet forms a plurality of magnetic poles.
35. An electrical device, comprising:

    An electric machine as claimed in any one of claims 30 to 34.
36. A stator assembly, comprising:

    A stator core, the stator core includes a stator yoke and stator main teeth, the stator main teeth include:

    a tooth body of the main tooth, the tooth root of the tooth body of the main tooth is connected to the stator yoke;

    A tooth shoe, arranged on the tooth top of the tooth body of the main tooth, the first stator auxiliary tooth and the second stator auxiliary tooth are arranged on the tooth shoe, and the first stator auxiliary tooth and the second stator auxiliary tooth grooves between the teeth;

    windings arranged on the main teeth of the stator;

    Wherein, the tooth shoes are arranged asymmetrically with respect to the main tooth body bisector of the main tooth body.
37. The stator assembly of claim 36, wherein:

    In the circumferential direction of the stator assembly, the distances from the two side walls of the groove to the bisector of the main tooth body of the main tooth body are not equal.
38. The stator assembly of claim 36, wherein:

    In the circumferential direction of the stator assembly, the distances from both ends of the tooth shoe to the main tooth body bisector of the main tooth body are not equal.
39. The stator assembly of claim 36, wherein:

    The number of the stator main teeth is at least two, and there is a slot between the adjacent first stator auxiliary teeth and the second stator auxiliary teeth, and at the slot, two adjacent stator teeth The angle bisector of the included angle formed between the main tooth body bisectors of the main tooth bodies has different distances from the first stator auxiliary teeth and the second stator auxiliary teeth.
40. The stator assembly of claim 39, wherein:

    In the circumferential direction of the stator assembly, the size of the notch is different from the size of the groove.
41. The stator assembly of claim 40, wherein:

    In the circumferential direction of the stator assembly, the size of the notch is smaller than the size of the groove.
42. A stator assembly as claimed in any one of claims 36 to 41 wherein,

    The stator yoke is annular, and the dedendum of the main teeth of the stator is connected to the outer peripheral wall of the stator yoke.
43. A stator assembly as claimed in any one of claims 36 to 41 wherein,

    The angle β formed between the main tooth body bisector of the first stator auxiliary tooth and the main tooth body bisector of the second stator auxiliary tooth satisfies: 1≤β/(2π/(ax))<1.4, where , a represents the number of the stator main teeth, x represents the number of stator auxiliary teeth on each of the stator main teeth, and the stator auxiliary teeth include the first stator auxiliary teeth and the second stator auxiliary teeth.
44. A stator assembly as claimed in any one of claims 36 to 41 wherein,

    The stator core includes at least two stacked bodies, any of the stacked bodies includes a yoke section and the stator main teeth, and the stator main teeth are arranged on the yoke section, and two adjacent The yoke segments of the stack are connected, the stator yoke comprising a plurality of the yoke segments.
45. The stator assembly of claim 44, wherein:

    The yoke sections of two adjacent stacked bodies are detachably connected;

    The stator assembly further includes a fixing member, through which two adjacent stacked bodies are fixed; and/or

    Two adjacent stacks are connected by welding; and/or

    Two adjacent stacked bodies are integrally injected.
46. A stator assembly as claimed in any one of claims 36 to 41 wherein,

    The dedendum of the main tooth body is detachably connected to the stator yoke; and/or

    The tooth top of the tooth body of the main tooth is detachably connected with the tooth shoe.
47. A motor, including:

    A stator assembly as claimed in any one of claims 36 to 46;

    A rotor assembly, the rotor assembly includes a rotor core and a plurality of permanent magnets, the plurality of permanent magnets are arranged on the rotor core and distributed at intervals in the circumferential direction of the rotor core, two adjacent The magnetic poles of the permanent magnets are different.
48. An electric machine according to claim 47, wherein,

    at least a portion of the stator assembly is located inside the rotor assembly; or

    At least a portion of the rotor assembly is located inside the stator assembly.
49. An electric machine as claimed in claim 47 or 48, wherein,

    The number of pole pairs Ps of the winding satisfies: Ps=│ax±Pr│, a represents the number of the stator main teeth, x represents the number of stator auxiliary teeth on each of the stator main teeth, and Pr represents the plurality of The number of pole pairs of the permanent magnet, wherein the auxiliary stator teeth include the first auxiliary stator teeth and the second auxiliary stator teeth.
50. An electrical device, comprising:

    An electric machine as claimed in any one of claims 47 to 49.

Images