WO2023108887A1 - Ensemble stator, moteur et dispositif électrique - Google Patents

Ensemble stator, moteur et dispositif électrique Download PDF

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Publication number
WO2023108887A1
WO2023108887A1 PCT/CN2022/077370 CN2022077370W WO2023108887A1 WO 2023108887 A1 WO2023108887 A1 WO 2023108887A1 CN 2022077370 W CN2022077370 W CN 2022077370W WO 2023108887 A1 WO2023108887 A1 WO 2023108887A1
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WO
WIPO (PCT)
Prior art keywords
stator
tooth
teeth
permanent magnet
stator assembly
Prior art date
Application number
PCT/CN2022/077370
Other languages
English (en)
Chinese (zh)
Inventor
冯艳丽
葛梦
李文瑞
Original Assignee
威灵（芜湖）电机制造有限公司
美的威灵电机技术（上海）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202111552283.7A external-priority patent/CN114069912A/zh
Priority claimed from CN202123183358.7U external-priority patent/CN216356122U/zh
Application filed by 威灵（芜湖）电机制造有限公司, 美的威灵电机技术（上海）有限公司 filed Critical 威灵（芜湖）电机制造有限公司
Publication of WO2023108887A1 publication Critical patent/WO2023108887A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/16—Stator cores with slots for windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots

Definitions

  • the present application designs the technical field of motors, and in particular, relates to a stator assembly, a motor and an electrical device.
  • This application aims to solve at least one of the technical problems existing in the prior art.
  • the first aspect of the present application provides a stator assembly.
  • the second aspect of the present application provides a motor.
  • the third aspect of the present application provides an electrical device.
  • the first aspect of the present application provides a stator assembly, including: main teeth of the stator, the main teeth of the stator include a tooth body and a tooth shoe, the tooth shoe is connected to one end of the tooth body; the end of the tooth shoe away from the tooth body is provided with at least two There are two auxiliary teeth, and there is a groove between two adjacent auxiliary teeth; the permanent magnet is arranged in the groove.
  • the stator assembly proposed in this application includes the main teeth of the stator.
  • the main teeth of the stator include a tooth body and a tooth shoe.
  • the tooth shoe is connected to one end of the tooth body. Further, the other end of the tooth body can be connected to the stator yoke, so The connection between the main teeth of the stator and the stator yoke can further provide windings on the main teeth of the stator to cooperate with the magnetic field of the rotor permanent magnet in the rotor assembly of the motor when energized, thereby realizing the rotation of the rotor assembly.
  • auxiliary teeth are provided on the end of the tooth shoe away from the tooth body.
  • the auxiliary teeth can be used as magnetic conductive parts for magnetic conduction, and on the other hand, the auxiliary teeth can also be used as modulation Components, to achieve the role of magnetic field modulation, so that more harmonic components are introduced into the air gap permeance, so that the performance of the motor has been significantly improved.
  • the stator assembly also includes permanent magnets, which are arranged in the grooves. Through the arrangement of the permanent magnets, the permanent magnets can generate working harmonics through the modulation of the rotor teeth on the rotor assembly during the operation of the motor. At the same time, the rotor permanent magnet on the rotor assembly can also modulate the working harmonics through the main teeth of the stator, so that the magnetic density harmonic component modulated between the stator assembly and the rotor assembly is further increased, thereby generating more working harmonics , to further increase the output torque of the motor.
  • the number of pole pairs of working harmonics generated between the permanent magnets in the stator assembly and the rotor teeth is:
  • the logarithm is: ⁇ Pr ⁇ i ⁇ Zf ⁇ , where Zf is the number of air gap permeance periods on the stator side, Par is the number of pole pairs of the permanent magnet in the stator, Pr is the number of pole pairs of the rotor assembly, and i is greater than or equal to Integer of 0.
  • the auxiliary teeth can not only be used as the magnetic conductive parts, but also can be used as the modulation parts to realize the function of magnetic field modulation, so that more harmonic components are introduced into the air gap magnetic conductance. In this way, The performance of the motor has been significantly improved.
  • the magnetic density harmonic components modulated between the stator assembly and the rotor assembly are further increased, thereby generating more working harmonics, Further increase the output torque of the motor.
  • stator assembly According to the stator assembly provided by this application, it may also have the following additional technical features:
  • the permanent magnet includes: a first permanent magnet arranged in the groove; a second permanent magnet arranged in the groove, and the second permanent magnet is located on the side of the first permanent magnet; The magnetization direction of the permanent magnet is opposite to that of the second permanent magnet.
  • the permanent magnet in the axial direction of the stator assembly, can be divided into two parts, that is, the permanent magnet includes a first permanent magnet and a second permanent magnet, and the second permanent magnet is located on the side of the first permanent magnet. part, and the magnetization direction of the first permanent magnet is opposite to the magnetization direction of the second permanent magnet, specifically, the magnetization direction of the first permanent magnet can be N/S pole, and correspondingly, the second permanent magnet The magnetization direction is S/N pole.
  • the axial segmental design of the rotor assembly of the motor can be matched, specifically, the magnetic components in the rotor assembly can also be divided into two parts in the axial direction, and the rotor assembly
  • the magnetization direction of the magnetic components in the stator corresponds to the magnetization direction of the permanent magnet in the stator, that is, the magnetization direction of the part of the rotor permanent magnet corresponding to the first permanent magnet is set as N/S pole, which is the same as the magnetization direction of the first permanent magnet.
  • the magnetization direction of the corresponding part of the two permanent magnets is the S/N pole, so that the phase difference of the induced back EMF of the armature winding of the two side motors is 180°, and finally the amplitude of the fundamental wave remains basically unchanged, but the harmonic content is greatly increased. Reduce, especially the even harmonics in the synthesized back EMF, thereby reducing motor cogging torque and torque ripple.
  • stator assembly further includes a magnetic spacer block disposed between the first permanent magnet and the second permanent magnet.
  • 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.
  • the notch there is a notch between two adjacent tooth shoes, and the notch communicates with the winding groove.
  • the setting of the notch 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.
  • 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.
  • the size of the groove between two adjacent auxiliary teeth and the size of the notch between the tooth shoes of two adjacent main teeth of the stator can be set to be unequal.
  • the uniformity of the distribution of the secondary teeth on the circumference of all stator main teeth can be changed, and the number of periods of the air gap permeance is reduced.
  • the air gap permeance period As the number decreases, the magnetic 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.
  • the at least two auxiliary teeth include first auxiliary teeth and second auxiliary teeth; in the circumferential direction of the stator assembly, the first auxiliary teeth and the second auxiliary teeth are located end.
  • the at least two auxiliary teeth include first auxiliary teeth and second auxiliary teeth.
  • first auxiliary teeth and the second auxiliary teeth are located at opposite ends of the tooth shoes, and slots are formed between adjacent first auxiliary teeth and second auxiliary teeth.
  • both the above-mentioned first auxiliary teeth and second auxiliary teeth can be used as magnetic field modulation components to improve the performance of the motor to which the stator assembly is applied.
  • the opposite ends of the tooth shoe are respectively provided with a first pair of teeth and a second pair of teeth, and the first pair of teeth and the second pair of teeth are located at the opposite ends of the tooth shoe in the direction of the circumference of the stator assembly.
  • both the first auxiliary teeth and the second auxiliary teeth can be used as magnetic field modulation components to improve the performance of the motor to which the stator assembly is applied.
  • the sizes of the first auxiliary teeth and the second auxiliary teeth are not equal.
  • the sizes of the first auxiliary teeth and the second auxiliary teeth are different.
  • the distribution of the air gap permeance between the stator assembly and the rotor assembly is effectively optimized, and the harmonic components of the flux density generated by modulation will increase, that is, more With more working harmonics, the output torque of the motor will be further improved.
  • the size of the first auxiliary teeth and the second auxiliary teeth are not equal
  • the size of the first auxiliary teeth is set to be larger
  • the size of the second auxiliary teeth is set to be smaller.
  • an included angle ⁇ is formed between the centerlines of two adjacent secondary teeth, and satisfies 1 ⁇ /(2 ⁇ /(b ⁇ x )) ⁇ 1.4, wherein, b represents the number of main teeth of the stator, and x represents the number of auxiliary teeth on each main tooth of the stator.
  • an included angle ⁇ is formed between the tooth body bisector of one auxiliary tooth and the tooth body bisector of the other auxiliary tooth, and satisfies 1 ⁇ /(2 ⁇ / (b ⁇ x)) ⁇ 1.4; wherein, b represents the number of stator main teeth, and x represents the number of auxiliary teeth on each stator main tooth.
  • 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.
  • stator assembly proposed in the present application, grooves are formed between two adjacent auxiliary teeth, so that more harmonic components are introduced into the air gap permeance.
  • new harmonic components will appear in the air-gap flux density. Then design the stator winding according to this harmonic component, and the new harmonic component in the air gap flux 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.
  • the stator assembly includes a stator yoke; one end of the tooth body is connected to the stator yoke, and the tooth shoe is arranged at the other end of the tooth body.
  • the stator assembly may specifically include a stator yoke and stator main teeth arranged on the stator yoke, wherein the stator main teeth include a tooth body and a tooth shoe, one end of the tooth body is connected with the stator yoke, and the teeth The shoe is connected to the other end of the tooth body, so as to realize the connection between the main teeth of the stator and the yoke of the stator, and then windings can be set on the main teeth of the stator to cooperate with the magnetic field of the permanent magnet of the rotor when energized, thereby realizing Rotation of the rotor assembly.
  • the stator main teeth include a tooth body and a tooth shoe, one end of the tooth body is connected with the stator yoke, and the teeth The shoe is connected to the other end of the tooth body, so as to realize the connection between the main teeth of the stator and the yoke of the stator, and then windings can be set on the main teeth of the stator to cooperate with the magnetic field
  • the tooth shoe is detachably connected to the tooth body; and/or the tooth body is detachably connected to the stator yoke.
  • a detachable connection can be set between the 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 tooth body of the stator main tooth and the stator yoke, that is, , A detachable sheathing assembly structure can be set between the tooth body of the stator main tooth and the stator yoke and the tooth shoe.
  • the winding can be wound on the tooth body of the main tooth of the stator first, and then the tooth body One end is connected to the stator yoke, and finally the tooth shoe is installed on the other end of the tooth body.
  • 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.
  • the 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 stator main tooth body, and correspondingly, at the corresponding position of the stator yoke
  • the protrusions or grooves are arranged on the grooves or the protrusions to cooperate with each other, so that the connection between the body of the main teeth of the stator and the stator yoke can be realized through the cooperation of the grooves and the protrusions.
  • the tooth body and the tooth shoe can also be connected by a concave-convex structure, that is, the tooth shoe and the tooth body can be connected by mutually matching protrusions and grooves, so as to simplify the winding process.
  • the height of the permanent magnet is smaller than the height of the groove.
  • the relationship between the height of the permanent magnet and the height of the groove is defined, specifically, in the radial direction of the stator assembly, the height of the permanent magnet can be set as It is smaller than the height of the groove, so that the permanent magnet protruding from the outside of the groove can be prevented from affecting the rotation of the rotor, which is beneficial to the rational design of the motor structure and ensures the stability of the motor during operation.
  • the shape of the permanent magnet is a polygon or an arc.
  • the permanent magnet can be square or triangular.
  • the stator assembly further includes a winding, which is arranged on the main teeth of the stator.
  • the stator assembly also includes windings.
  • the winding is wound on the main teeth of the stator to ensure the output torque when the motor using the stator assembly is running.
  • a motor including: a rotor assembly; and a stator assembly according to any one of the above technical solutions.
  • the stator assembly can be arranged such that at least a part is located in the rotor assembly, that is, the inner stator structure. 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 motor. PTO. 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.
  • the motor provided by the present application includes the stator assembly according to the first aspect of the present application. Therefore, not only have all the beneficial effects of the above-mentioned stator assembly, but will not be discussed in detail here.
  • the rotor assembly includes: a rotor core, the rotor core includes a rotor yoke and a plurality of salient poles, the plurality of salient poles are arranged on the rotor yoke, and an installation is formed between adjacent salient poles.
  • the slot; the permanent magnet of the rotor is arranged in the installation slot.
  • the rotor assembly includes a rotor core and a plurality of rotor permanent magnets.
  • the rotor core includes an annular portion and a plurality of salient poles, the plurality of salient poles protrude from the inner peripheral wall of the annular portion, and the plurality of salient poles are distributed at intervals in the circumferential direction of the annular portion.
  • a plurality of permanent magnets are respectively arranged between two adjacent salient poles, and the magnetization directions of the plurality of permanent magnets are the same. In this way, in the circumferential direction of the annular portion, a plurality of salient poles and a plurality of permanent magnets are alternately distributed.
  • a plurality of permanent magnets with the same magnetization direction are respectively arranged between two adjacent salient poles, and a magnetic structure of alternating poles is formed on the annular part of the rotor core, so that the rotor core has a salient pole structure.
  • the number of permanent magnets used is reduced, and the manufacturing difficulty of the alternating pole 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 produces better output performance.
  • a plurality of salient poles and a plurality of permanent magnets are arranged alternately on the ring part of the rotor core, which also avoids the decrease 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, resulting in Torque drop problem.
  • the permanent magnets in the stator assembly can generate working harmonics through the salient pole modulation on the rotor assembly, and at the same time, the rotor permanent magnets on the rotor assembly can also modulate the working harmonics through the main teeth of the stator , so that the flux density harmonic components modulated between the stator assembly and the rotor assembly further increase, thereby generating more working harmonics, and further increasing the output torque of the motor.
  • the rotor core may include two parts, that is, a first rotor core and a second rotor core, and the first rotor core and the second rotor core have the same structure.
  • rotor permanent magnets are arranged between the adjacent salient poles of the first rotor core and the second rotor core, and the center line of the salient poles of the first rotor core is aligned with the rotor in the second rotor core.
  • the centerlines of the permanent magnets are aligned.
  • the centerlines of the rotor permanent magnets in the first rotor core are aligned with the centerlines of the salient poles of the second rotor core.
  • the rotor permanent magnet in the first rotor core is opposite to the first permanent magnet in the stator assembly, and the magnetization direction is the same, and the rotor permanent magnet in the second rotor core is in the same position as the second permanent magnet in the stator assembly.
  • the positions of the magnets are opposite, and the magnetization direction is the same, that is, the magnetization direction of the rotor permanent magnet in the first rotor core is opposite to that of the rotor permanent magnet in the second rotor core.
  • the axial section setting of the motor is realized, so that the phase difference of the induced back EMF of the armature winding of the two sections of the side motor is 180°, and finally the amplitude of the fundamental wave remains basically unchanged, but the harmonic content is greatly reduced, especially is the even harmonic in the synthesized back EMF, thereby reducing motor cogging torque and torque ripple.
  • the number of pole pairs of the stator assembly is Pa
  • the number of pole pairs of the permanent magnet is P1
  • the number of stator main teeth is x
  • the number of auxiliary teeth on each stator main tooth is a
  • or Pa
  • the new harmonic components appearing in the air gap magnetic density can be used as the working harmonics of the motor, providing the motor with output torque, thus effectively improving the torque density of the motor.
  • the number of pole pairs of the stator assembly is Pa
  • the number of pole pairs of the permanent magnet is P1
  • the number of stator main teeth is x
  • the number of auxiliary teeth on each stator main tooth is a
  • or Pa
  • an electrical device including the motor according to any one of the above technical solutions.
  • the electrical equipment provided by the present application includes the motor of any one of the above technical solutions, so it has all the beneficial effects of the motor, and will not be repeated here.
  • Fig. 1 shows a schematic structural diagram of a stator assembly provided according to an embodiment of the present application
  • Fig. 2 shows a schematic structural view of a stator assembly provided according to another embodiment of the present application
  • Fig. 3 shows a schematic structural diagram of a stator assembly provided according to yet another embodiment of the present application
  • Fig. 4 shows a schematic structural diagram of a stator assembly provided according to yet another embodiment of the present application
  • Fig. 5 shows a schematic structural diagram of a stator assembly provided according to yet another embodiment of the present application.
  • Fig. 6 shows a schematic structural view of a stator assembly provided according to yet another embodiment of the present application.
  • Fig. 7 shows a schematic structural diagram of a motor provided according to an embodiment of the present application.
  • Fig. 8 shows a schematic structural diagram of a motor provided according to another embodiment of the present application.
  • Fig. 9 shows a schematic structural diagram of a motor provided according to yet another embodiment of the present application.
  • Fig. 10 shows a schematic structural diagram of a rotor assembly in a motor provided according to an embodiment of the present application
  • Fig. 11 shows a schematic structural diagram of a rotor assembly in a motor provided according to another embodiment of the present application.
  • Fig. 12 shows a schematic structural view of a rotor assembly in a motor provided according to yet another embodiment of the present application
  • Fig. 13 shows a graph of the no-load back EMF changing with time during the operation of the motor according to an embodiment of the present application
  • Fig. 14 is a schematic diagram showing the variation of the amplitude of each harmonic of the no-load back EMF with time during the operation of the motor according to an embodiment of the present application.
  • stator assembly 102 stator main tooth, 104 tooth body, 106 tooth shoe, 108 auxiliary tooth, 110 permanent magnet, 112 first permanent magnet, 114 second permanent magnet, 118 winding, 120 stator yoke, 122 groove, 124 First auxiliary teeth, 126 second auxiliary teeth, 128 winding slots, 130 notches, 200 motors, 202 rotor assemblies, 204 rotor yokes, 206 rotor permanent magnets, 208 salient poles, 210 rotor cores.
  • FIGS. 1 to 14 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 14 .
  • line L4 in FIG. 13 represents the curve of the no-load back EMF of the motor 200 in the axial direction changing with time
  • L5 represents the curve of the no-load back EMF of the motor 200 in the other axial direction changing with time.
  • H1 represents the harmonic amplitude of the no-load back EMF of the motor without axial segment design
  • H2 represents the harmonic amplitude of the no-load back EMF of the motor with axial segment design.
  • a stator assembly 100 including: a stator yoke 120 , stator main teeth 102 and permanent magnets 110 .
  • the stator main tooth 102 includes a tooth body 104 and a tooth shoe 106, one end of the tooth body 104 is connected with the stator yoke 120, and the tooth shoe 106 is connected with the other end of the tooth body 104; the end of the tooth shoe 106 is far away from the tooth body 104
  • At least two auxiliary teeth 108 are arranged on the upper part, and there is a groove 122 between two adjacent auxiliary teeth 108 .
  • the permanent magnet 110 is disposed in the groove 122 .
  • the stator assembly 100 proposed in this application includes the stator main tooth 102, the stator main tooth 102 includes a tooth body 104 and a tooth shoe 106, the tooth shoe 106 is connected with one end of the tooth body 104, further, the other end of the tooth body 104 can be connected with
  • the stator yoke portion 120 is connected to realize the connection between the stator main tooth 102 and the stator yoke portion 120, and then a winding can be arranged on the stator main tooth 102 to achieve permanent contact with the rotor in the rotor assembly 202 of the motor 200 when energized.
  • the magnetic fields of the magnets 206 cooperate to achieve the rotation of the rotor assembly 202 .
  • At least two auxiliary teeth 108 are provided on the end of the tooth shoe 106 away from the tooth body 104.
  • the at least two auxiliary teeth 108 can be used as magnetic conductive parts for magnetic conduction
  • at least two auxiliary teeth 108 can also be used as modulation components to realize the effect of magnetic field modulation, so that more harmonic components are introduced into the air-gap permeance, so that the performance of the motor is significantly improved.
  • the stator assembly 100 also includes a permanent magnet 110, the permanent magnet 110 is arranged in the groove 122, through the arrangement of the permanent magnet 110, the permanent magnet 110 can pass through the salient pole 208 on the rotor assembly 202 during the operation of the motor
  • the modulation generates working harmonics.
  • the rotor permanent magnet 206 on the rotor assembly 202 can also modulate the working harmonics through the stator main teeth 102, so that the magnetic density generated by the modulation between the stator assembly 100 and the rotor assembly 202 The wave component is further increased, thereby generating more working harmonics, and further increasing the output torque of the motor.
  • the number of working harmonic pole pairs generated between the permanent magnets 110 and the salient poles 208 in the stator assembly 100 is:
  • the number of pole pairs of the wave is: ⁇ Pr ⁇ i ⁇ Zf
  • Pole logarithm, i is an integer greater than or equal to 0.
  • the stator assembly 100 provided in this application through the setting of the auxiliary teeth 108, the auxiliary teeth 108 can not only serve as a magnetically conductive part, but also serve as a modulating part to realize the function of magnetic field modulation, so that more harmonic components are introduced into the air gap magnetic conductance , so that the performance of the motor has been significantly improved.
  • the permanent magnet 110 in the groove 122 between the adjacent auxiliary teeth 108, the flux density harmonic component modulated between the stator assembly 100 and the rotor assembly 202 is further increased, thereby generating more The working harmonics further increase the output torque of the motor.
  • the permanent magnet 110 can adopt ferrite, rare earth permanent magnet and other magnets with good magnetic permeability.
  • the permanent magnets 110 may be arranged in a V shape or in a spoke shape.
  • the cross-section of the groove 122 between the stator main teeth 102 can be set to a shape suitable for the permanent magnet 110 to ensure the stability of the installation of the permanent magnet 110 .
  • the permanent magnets 110 may be arranged in a Halbach Array.
  • the permanent magnet 110 includes: a first permanent magnet 112 disposed in the groove 122; a second permanent magnet 114 disposed in the groove 122 along the In the axial direction of the stator assembly 100 , the second permanent magnet 114 is located at the side of the first permanent magnet 112 ; the magnetization direction of the first permanent magnet 112 is opposite to that of the second permanent magnet 114 .
  • the permanent magnet 110 in the axial direction of the stator assembly 100, can be divided into at least two parts, that is, the permanent magnet 110 includes a first permanent magnet 112 and a second permanent magnet 114, and the second permanent magnet 114 Located on the side of the first permanent magnet 112, and the magnetization direction of the first permanent magnet 112 and the magnetization direction of the second permanent magnet 114 are set to be opposite, specifically, the magnetization direction of the first permanent magnet 112 can be N /S pole, correspondingly, the magnetization direction of the second permanent magnet 114 is S/N pole.
  • the axial segmental design of the rotor assembly 202 of the motor can be matched, specifically, the rotor permanent magnet 206 in the rotor assembly 202 is also It can be divided into two parts in the axial direction, and the magnetization direction of the rotor permanent magnet 206 in the rotor assembly 202 corresponds to the magnetization direction of the permanent magnet 110 in the stator, that is, the rotor permanent magnet 206 and the first
  • the magnetization direction of the part corresponding to the permanent magnet 112 is set as the N/S pole
  • the magnetization direction of the part corresponding to the second permanent magnet 114 is the S/N pole, so that the armature windings of the two-stage side motor induce back EMF
  • the phase difference is 180°, and finally its fundamental wave amplitude remains basically unchanged, but the harmonic content is greatly reduced, especially the even harmonics in the synthetic back EMF, thereby reducing the cogging torque and torque ripple of
  • stator assembly 100 further includes a magnetic spacer block disposed between the first permanent magnet 112 and the second permanent magnet 114 .
  • a magnetic spacer block between the first permanent magnet 112 and the second permanent magnet 114, it is possible to effectively prevent the magnetic fields generated between the first permanent magnet 112 and the second permanent magnet 114 with opposite magnetization directions from interacting with each other. interference, to ensure that the first permanent magnet 112 and the second permanent magnet 114 can play their due roles respectively, and to ensure that the magnetic density harmonic component modulated between the stator assembly 100 and the rotor assembly 202 can be further increased, thereby generating more More working harmonics can further increase the output torque of the motor.
  • the number of stator main teeth 102 can be multiple, and the number of stator main teeth 102 can be set to multiple, and the plurality of stator main teeth 102 are distributed along the circumferential direction of the stator yoke 120, thereby ensuring that the stator
  • the number of windings 118 wound on the stator main teeth 102 in the assembly 100 ensures that the magnetic field generated by the permanent magnet 110 can effectively cooperate with the windings 118 during the operation of the motor, thereby ensuring the operating efficiency of the motor.
  • the number of x is the number of stator main teeth 102. That is, permanent magnets 110 are provided in the grooves 122 between any two adjacent secondary teeth 108, so as to ensure that the permanent magnets 110 can generate a magnetic field sufficient to match the rotor assembly 202 during the operation of the motor.
  • the permanent magnet 110 can generate sufficient working harmonics through the modulation of the salient poles 208 on the rotor assembly 202 to match the working harmonics modulated by the rotor permanent magnet 206 on the rotor assembly 202 through the stator main teeth 102, thereby generating more Working harmonics further increase the output torque of the motor.
  • the outer edges of the plurality of stator main teeth 102 are located on the same circle and are concentric with the stator yoke 120, forming a uniform air gap between the stator main teeth 102 and the rotor, matching the teeth on the tooth shoe 106.
  • the groove 122 between two adjacent auxiliary teeth 108 realizes the uneven setting of the air gap between the stator assembly 100 and the rotor assembly 202, and then realizes the improvement of the waveform of the air gap magnetic field, so that the permanent magnets in the air gap
  • the resulting magnetic field is more sinusoidal, which reduces the cogging torque and torque ripple of the motor.
  • a winding slot 128 between two adjacent tooth bodies 104, and a notch 130 is provided between two adjacent tooth shoes 106, and the slot
  • the opening 130 communicates with the winding groove 128 ; in the circumferential direction of the stator assembly 100 , the size of the groove 122 is different from that of the notch 130 .
  • notch 130 there is a notch 130 between two adjacent tooth shoes 106 , and the notch 130 communicates with the winding groove 128 .
  • the setting of the notch 130 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.
  • 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 130 to meet different operating requirements of the motor.
  • the size of the groove 122 between two adjacent auxiliary teeth 108 and the size of the notch 130 between the tooth shoes 106 of two adjacent stator main teeth 102 can be set to be unequal .
  • the width of the groove 122 may be set to be unequal to the width of the notch 130 .
  • the size of the groove 122 is larger than the size of the notch 130 .
  • the width of the groove 122 between two adjacent auxiliary teeth 108 is d1
  • the width of the notch 130122 is d2
  • d1>d2 is satisfied.
  • the uniformity of the distribution of the auxiliary teeth 108 on all the stator main teeth 102 on the circumference can be changed, and the number of cycles of the air gap permeance is reduced. As the number of 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.
  • At least two auxiliary teeth 108 include first auxiliary teeth 124 and second auxiliary teeth 126; in the circumferential direction of the stator assembly 100, the first The auxiliary tooth 124 and the second auxiliary tooth 126 are located at opposite ends of the tooth shoe 106 .
  • the at least two secondary teeth 108 include a first secondary tooth 124 and a second secondary tooth 126 .
  • first auxiliary teeth 124 and the second auxiliary teeth 126 are located at opposite ends of the tooth shoe 106, and a notch is formed between the adjacent first auxiliary teeth 124 and the second auxiliary teeth 126. 130.
  • first auxiliary teeth 124 and second auxiliary teeth 126 can be used as magnetic field modulation components to improve the performance of the motor to which the stator assembly 100 is applied.
  • a first auxiliary tooth 124 and a second auxiliary tooth 126 are respectively provided at opposite ends of the tooth shoe 106. direction.
  • both the first auxiliary teeth 124 and the second auxiliary teeth 126 can be used as magnetic field modulation components to improve the performance of the motor to which the stator assembly 100 is applied.
  • the sizes of the first auxiliary teeth 124 and the second auxiliary teeth 126 are different.
  • the sizes of the first auxiliary teeth 124 and the second auxiliary teeth 126 are different.
  • the distribution of the air gap permeance between the stator assembly 100 and the rotor assembly 202 is effectively optimized, and the magnetic 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.
  • a scheme in which the sizes of the first auxiliary teeth 124 and the second auxiliary teeth 126 are unequal may be adopted, for example, the size of the first auxiliary teeth 124 is set larger, and the size of the second auxiliary teeth 126 is set smaller.
  • the distribution of the air gap permeance between the stator assembly 100 and the rotor assembly 202 can be effectively optimized, and the generated flux density harmonics can be modulated.
  • the component will increase, that is, more working harmonics will be generated, and the output torque of the motor will be further increased, thereby improving the operating efficiency of the motor.
  • an angle ⁇ is formed between the centerlines of two adjacent secondary teeth 108 , and the angle ⁇ satisfies 1 ⁇ /(2 ⁇ /(b ⁇ x)) ⁇ 1.4, wherein, b represents the number of main stator teeth 102 , and x represents the number of auxiliary teeth 108 on each main stator tooth 102 .
  • an included angle ⁇ is formed between the tooth body 104 bisector L2 of one auxiliary tooth 108 and the tooth body 104 bisector L3 of the other auxiliary tooth 108, and satisfies 1 ⁇ /(2 ⁇ /(b ⁇ x)) ⁇ 1.4; wherein, b represents the number of stator main teeth 102 , and x represents the number of auxiliary teeth 108 on each stator main tooth 102 .
  • the present application further optimizes the structure and distribution of the auxiliary teeth 108, 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.
  • the auxiliary teeth 108 may only include the first auxiliary teeth 124 and the second auxiliary teeth 126 disposed at both ends of the tooth shoe 106, that is, the number of auxiliary teeth 108 is two, and the number of stator main teeth 102 is six , correspondingly, the angle ⁇ between the bisector L2 of the tooth body 104 of the first auxiliary tooth 124 and the bisector L3 of the tooth body 104 of the second auxiliary tooth 126 satisfies 1 ⁇ /(2 ⁇ /(6 ⁇ 2)) ⁇ 1.4.
  • the amplitude of the harmonics generated by the modulation of the motor applied with the stator assembly 100 larger and the torque higher, so as to further improve the working efficiency of the motor 200 .
  • the distance from the bisector of the tooth body 104 of the stator main tooth 102 to the two side walls of the groove 122 is equal or different.
  • the application optimizes the distribution of the groove 122 on the tooth shoe 106, so that the tooth body of the stator main tooth 102
  • the distance from the bisector L1 of 104 to the two side walls of the groove 122 is equal or different.
  • Such a design realizes the asymmetric arrangement of the tooth shoe 106 (the tooth shoe 106 is arranged asymmetrically with respect to the bisector L1 of the tooth body 104 ). In this way, 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.
  • the distance from the bisector L1 of the tooth body 104 of the main stator tooth 102 to the two side walls of the groove 122 is equal.
  • the groove 122 is located in the middle of the tooth shoe 106 .
  • Such a design can simplify the overall structure of the stator main teeth 102 and facilitate the manufacturing of the stator main teeth 102, thereby improving the processing efficiency of the stator assembly 100 and the entire motor.
  • the distances from the tooth body 104 bisector L1 of the stator main tooth 102 to the two side walls of the groove 122 are d3 and d4 respectively, and d3 is equal to d4.
  • the distance from the bisector L1 of the tooth body 104 of the main stator tooth 102 to the two side walls of the groove 122 may also be different.
  • the groove 122 is offset toward one end of the tooth shoe 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.
  • new harmonic components will appear in the air-gap flux density.
  • at least two auxiliary teeth 108 introduce more harmonic components into the air-gap permeance, so that the performance of the motor is significantly improved.
  • stator assembly 100 proposed in the present application, grooves 122 are formed between two adjacent auxiliary teeth 108 , so that more harmonic components are introduced into the air gap permeance.
  • new harmonic components will appear in the air-gap flux density.
  • design the stator winding 118 according to the harmonic components, and the new harmonic components appearing in the air gap flux density can be used as the working harmonics of the motor 200 to provide output torque for the motor 200, thereby effectively improving the rotation speed of the motor 200. moment density.
  • the stator assembly 100 includes at least two stacked bodies, and the stator assembly 100 is manufactured by stacking at least two stacked bodies. In this way, during the manufacturing process of the stator assembly 100 , workers can first perform operations such as winding wires on a single stack.
  • 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.
  • the present application can first perform operations such as winding on a single stacked body, which can effectively increase the winding quantity of the coils of the winding 118, increase the slot fill rate of the winding 118, 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 100 .
  • 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 100 .
  • the yoke section of a stack may include one stator main tooth 102 , or may include two or more stator main teeth 102 .
  • the yoke sections of two adjacent stacked bodies are detachably connected, thereby ensuring the disassembly and assembly of the two adjacent stacked bodies.
  • the stator assembly 100 also includes a first connection part and a second connection part.
  • 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
  • the first end and the second section are oppositely arranged on the yoke section.
  • 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.
  • one of the first connecting portion and the second connecting portion is a convex portion
  • the other is a concave portion.
  • 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.
  • stator assembly 100 also includes a fixing part (not shown in the figure). 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.
  • 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.
  • two adjacent stacked bodies can also be 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.
  • two adjacent stacked bodies can also be integrally injected. That is, after the splicing of two adjacent stacked bodies 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.
  • the tooth shoe 106 is detachably connected to the tooth body 104 ; and/or the tooth body 104 is detachably connected to the stator yoke 120 .
  • the tooth body 104 of the stator main tooth 102 and the tooth shoe 106 can be set as a detachable connection, and at the same time, the tooth body 104 of the stator main tooth 102 can also be set as a detachable connection
  • the detachable connection that is, the tooth body 104 of the stator main tooth 102 and the stator yoke 120 and the tooth shoe 106 may be arranged as a detachable sheathing assembly structure.
  • the tooth body 104 of the stator main tooth 102 and the stator yoke 120 can be connected through a concave-convex structure, that is, a groove 122 or a protrusion is provided at one end of the stator main tooth 102 tooth body 104, and correspondingly, in The corresponding position of the stator yoke 120 is set on the groove 122 or the protrusion or the groove 122 that matches the protrusion, so that the stator main tooth 102 and the tooth body 104 of the stator yoke 120 can be realized through the cooperation of the groove 122 and the protrusion. the connection between.
  • the tooth body 104 and the tooth shoe 106 can also be connected through a concave-convex structure, that is, the connection between the tooth shoe 106 and the tooth body 104 is carried out through mutually matching protrusions and grooves 122, so as to realize the winding process simplification.
  • the height of the permanent magnet 110 is smaller than the height of the groove 122 .
  • the relationship between the height of the permanent magnet 110 and the height of the groove 122 is defined, specifically, in the radial direction of the stator assembly 100, the permanent magnet 110
  • the height can be set to be less than the height of the groove 122, so as to prevent the permanent magnet 110 protruding from the outside of the groove 122 and affect the rotation of the rotor, which is conducive to the rational design of the motor structure and ensures the stability of the motor during operation.
  • the shape of the permanent magnet 110 is a polygon or an arc.
  • the cross-sectional area of the groove 122 for placing the permanent magnet 110 may be a polygon or an arc suitable for the shape of the permanent magnet 110 .
  • the shape of the permanent magnet 110 may be square or triangular.
  • a motor is proposed, including: a rotor assembly 202 ; and a stator assembly 100 according to any one of the above technical solutions.
  • the stator assembly 100 can be arranged so that at least a part thereof is located in the rotor assembly 202, that is, the inner stator structure. Specifically, the stator assembly 100 is arranged concentrically with the rotor assembly to ensure that the rotor assembly 202 can rotate relative to the stator assembly 100. , to realize the power output of the motor. Wherein, a part of the stator assembly 100 is located in the rotor assembly 202, and the stator assembly 100 can also be integrally arranged in the rotor assembly 202 in the axial direction, so as to realize the connection between the rotor permanent magnet 206 of the rotor assembly and the winding 118 of the stator assembly 100. Different fits.
  • the structure of the motor 200 may also be configured as an outer stator structure.
  • the motor provided by the present application includes the stator assembly 100 according to the first aspect of the present application. Therefore, all the beneficial effects of the above-mentioned stator assembly 100 are available, and will not be discussed in detail here.
  • the rotor assembly 202 includes: a rotor core, the rotor core includes a rotor yoke 204 and a plurality of salient poles 208 , and a plurality of salient poles 208
  • the poles 208 are disposed on the rotor yoke 204 , and installation grooves are formed between adjacent salient poles 208 ; the rotor permanent magnets 206 are disposed in the installation grooves.
  • rotor assembly 202 includes a rotor core 210 and a plurality of rotor permanent magnets 206 .
  • the rotor core 210 includes a rotor yoke 204 and a plurality of salient poles 208, the plurality of salient poles 208 protrude from the inner peripheral wall of the rotor yoke 204, and the plurality of salient poles 208 are spaced apart in the circumferential direction of the rotor yoke 204 distributed.
  • the plurality of rotor permanent magnets 206 are respectively disposed between two adjacent salient poles 208 , and the magnetization directions of the plurality of rotor permanent magnets 206 are the same. In this way, in the circumferential direction of the rotor yoke 204 , a plurality of salient poles 208 and a plurality of rotor permanent magnets 206 are alternately distributed.
  • a plurality of rotor permanent magnets 206 with the same magnetization direction are respectively arranged between two adjacent salient poles 208, and a magnetic structure of alternating poles is formed on the rotor yoke 204 of the rotor core 210, so that the rotor core 210 It is a salient pole 208 structure.
  • the number of rotor permanent magnets 206 used is reduced, and the manufacturing difficulty of the alternating pole 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 produces better output performance .
  • a plurality of salient poles 208 and a plurality of rotor permanent magnets 206 are arranged alternately on the rotor yoke 204 of the rotor core 210, which also avoids the reduction in the number of magnetic poles after the use of alternating poles in the related art, and the fundamental wave of the magnetic field The amplitude drops, causing the problem of torque drop.
  • the permanent magnets 110 in the stator assembly 100 can be modulated by the salient poles 208 on the rotor assembly 202 to generate working harmonics, and at the same time, the rotor permanent magnets 206 on the rotor assembly 202 can also pass through the stator
  • the main teeth 102 modulate the working harmonics, so that the flux density harmonic components modulated between the stator assembly 100 and the rotor assembly 202 further increase, thereby generating more working harmonics, and further increasing the output torque of the motor 200 .
  • the rotor core 210 may include two parts, that is, the first rotor core 210 and the second rotor core 210, the first rotor core 210 and the second rotor core
  • the structure of the core 210 is the same.
  • rotor permanent magnets 206 are arranged between the adjacent salient poles 208 of the first rotor core 210 and the second rotor core 210, and the centerline of the salient poles 208 of the first rotor core 210 and the second The centerlines of the rotor permanent magnets 206 in the rotor core 210 are aligned.
  • the centerlines of the rotor permanent magnets 206 in the first rotor core 210 are aligned with the centerlines of the salient poles 208 of the second rotor core 210 .
  • the rotor permanent magnet 206 in the first rotor core 210 is opposite to the first permanent magnet 112 in the stator assembly 100, and the magnetization direction is the same, and the rotor permanent magnet 206 in the second rotor core 210 is in the same position as the stator
  • the positions of the second permanent magnets 114 in the assembly 100 are opposite, and the magnetization directions are the same.
  • the axial segment setting of the motor 200 is realized, so that the phase difference of the induced back EMF of the armature winding 118 of the two segments of the motor is 180°, and finally the amplitude of the fundamental wave basically remains unchanged, but the harmonic content is greatly reduced , especially the even harmonics in the synthetic back EMF, thereby reducing the cogging torque and torque ripple of the motor 200.
  • the rotor permanent magnets 206 may be arranged in a Halbach Array.
  • the number of pole pairs of the stator assembly 100 is Pa
  • the number of pole pairs of the rotor permanent magnet 206 is P1
  • the number of stator main teeth 102 is x
  • the pair on each stator main tooth 102 is The number of teeth 108 is a
  • or Pa
  • the new harmonic components appearing in the air gap flux density can be used as the working harmonics of the motor 200,
  • the output torque is provided for the motor, thereby effectively improving the torque density of the motor 200 .
  • the number of pole pairs of the stator assembly 100 is Pa
  • the number of pole pairs of the permanent magnets 110 is P1
  • the number of stator main teeth 102 is x
  • the number of auxiliary teeth 108 on each stator main tooth 102 is a
  • or Pa
  • the limiting formula calculation of the modulation relationship on the component 202 side, Pa ⁇ 2 ⁇ 6 ⁇ 10
  • 4 or 16, specifically can be 4. Therefore, according to the calculation, the optimal number of pole pairs of the stator assembly 100 is 2 or 4.
  • an electrical device including the motor 200 in any one of the above embodiments.
  • the electrical equipment may include an air conditioner, a washing machine, a vacuum cleaner, and the like.
  • the electrical equipment provided by the present application includes the motor of any one of the above technical solutions, so it has all the beneficial effects of the motor, and will not be repeated here.
  • connection refers to two or more than two.
  • connection can be fixed connection, detachable connection, or integral connection; it can be directly connected or through an intermediate The medium is indirectly connected.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente demande concerne un ensemble stator, un moteur et un dispositif électrique. L'ensemble stator comprend : des dents principales de stator, chaque dent principale de stator comprenant un corps de dent et un patin de dent, le patin de dent étant relié à une extrémité du corps de dent, au moins deux dents auxiliaires étant disposées à l'extrémité du patin de dent la plus éloignée du corps de dent, et des fentes étant chacune formées entre deux dents auxiliaires adjacentes ; et des aimants permanents disposés dans les fentes. Selon l'ensemble stator prévu par la présente demande, un aimant permanent est disposé dans une fente entre des dents auxiliaires adjacentes, de telle sorte qu'une composante harmonique de densité de flux magnétique générée par la modulation entre l'ensemble stator et un ensemble rotor est accrue, davantage d'harmoniques de travail sont générées, et un couple de sortie du moteur est amélioré.
PCT/CN2022/077370 2021-12-17 2022-02-23 Ensemble stator, moteur et dispositif électrique WO2023108887A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202111552283.7 2021-12-17
CN202123183358.7 2021-12-17
CN202111552283.7A CN114069912A (zh) 2021-12-17 2021-12-17 定子组件、电机和电器设备
CN202123183358.7U CN216356122U (zh) 2021-12-17 2021-12-17 定子组件、电机和电器设备

Publications (1)

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WO2023108887A1 true WO2023108887A1 (fr) 2023-06-22

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057733A (en) * 1988-11-10 1991-10-15 Matsushita Electric Industrial Co., Ltd. Modular coil cores for electric motor
US5773908A (en) * 1993-02-22 1998-06-30 General Electric Company Single phase motor with positive torque parking positions
CN103647423A (zh) * 2013-11-28 2014-03-19 江苏大学 一种定转子永磁型游标电机
CN108900055A (zh) * 2018-09-06 2018-11-27 无锡力必特自动化设备有限公司 一种非均匀排列的裂齿定转子永磁游标电机
CN112953046A (zh) * 2021-03-17 2021-06-11 江苏大学 一种低谐波损耗的定子模块化磁场调制电机
CN114069912A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 定子组件、电机和电器设备
CN114069911A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 定子组件、电机和电器设备
CN114069910A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 定子组件、电机和电器设备

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5057733A (en) * 1988-11-10 1991-10-15 Matsushita Electric Industrial Co., Ltd. Modular coil cores for electric motor
US5773908A (en) * 1993-02-22 1998-06-30 General Electric Company Single phase motor with positive torque parking positions
CN103647423A (zh) * 2013-11-28 2014-03-19 江苏大学 一种定转子永磁型游标电机
CN108900055A (zh) * 2018-09-06 2018-11-27 无锡力必特自动化设备有限公司 一种非均匀排列的裂齿定转子永磁游标电机
CN112953046A (zh) * 2021-03-17 2021-06-11 江苏大学 一种低谐波损耗的定子模块化磁场调制电机
CN114069912A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 定子组件、电机和电器设备
CN114069911A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 定子组件、电机和电器设备
CN114069910A (zh) * 2021-12-17 2022-02-18 威灵（芜湖）电机制造有限公司 定子组件、电机和电器设备

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