CN113300515A - Tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure and method thereof - Google Patents
Tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure and method thereof Download PDFInfo
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- CN113300515A CN113300515A CN202110655709.5A CN202110655709A CN113300515A CN 113300515 A CN113300515 A CN 113300515A CN 202110655709 A CN202110655709 A CN 202110655709A CN 113300515 A CN113300515 A CN 113300515A
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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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2793—Rotors axially facing stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
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- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The invention provides a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure and a method thereof, wherein the motor structure comprises the following components: a rotor disk and a stator disk; the stator disc is axially sleeved along the rotating shaft and is positioned between the front rotor disc fixing section and the rear rotor disc fixing section; the front rotor disc fixing section and the rear rotor disc fixing section are both sleeved with rotor discs; the rotor disc comprises a rotating disc, one surface of the rotating disc is additionally provided with a magnetic conduction plate, and the other surface of the rotating disc is embedded with a rotor magnetic pole and a rotor permanent magnet, the rotor magnetic pole and the rotor permanent magnet are alternately arranged along the circumferential direction, and the magnetizing directions of two adjacent rotor permanent magnets are opposite; the stator disc includes a number of stator armatures.
Description
Technical Field
The invention belongs to the field of permanent magnet brushless motors, and particularly relates to a multi-pole fractional slot concentrated winding disc type axial magnetic field permanent magnet brushless motor.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Compared with a direct current motor and a stepping motor, the permanent magnet brushless motor has the advantages of compact structure, good dynamic response performance, high efficiency and the like, and is widely applied to the fields of industrial robots, machine tools, electric automobiles and the like. At present, a common permanent magnet brushless motor mainly adopts a radial magnetic flux structure, a magnetic flux path of the common permanent magnet brushless motor is a two-dimensional magnetic circuit structure, and a rotor usually adopts a surface-mounted permanent magnet. Compared with the traditional radial flux permanent magnet motor, the disc type axial magnetic field permanent magnet motor has the advantages of short axial length, light weight, high efficiency, high power density, high torque density and high torque/rotational inertia ratio. Theoretically, the disc type axial magnetic field permanent magnet motor can achieve higher output power and output torque under the same size, has higher response speed, and has increasingly prominent advantages in the field of electric automobiles.
In 1821, faraday invented the first single-stator single-rotor axial magnetic field permanent magnet motor in the world. Axial field permanent magnet motors have not been developed further because of the lower process level at the time. With the application and development of radial motors, the disadvantages of axial field permanent magnet motors are exposed, including difficulty in cooling, low core utilization, and the like. In early 1940, the axial magnetic field permanent magnet motor starts to return to the field of vision of the industry and is emphasized, and the axial magnetic field permanent magnet brushless direct current motor is mainly used in early years, along with social development, higher requirements on the application range, power and other performances of the motor are met, and the axial magnetic field permanent magnet synchronous motor is developed. The 1994 german scholars Banitsch et al proposed an etched winding axial field machine that used a four layer winding design, with its lower speed resulting in excessive winding turns and hence excessive resistance and lower efficiency. Italy Profumo et al designs an axial magnetic field motor made of plastic and soft magnetic material by combining the unique H-shaped magnetic circuit structure of the axial magnetic field motor, thereby reducing the processing difficulty, lightening the motor quality and reducing the motor cost. A disc type permanent magnet motor with a 4.5kW slotless structure is developed by Luca Solero et al in Italy to be used as a wheel driving motor of an electric automobile, and the motor adopts a dual-rotor single-stator back-to-back winding structure, so that the end part of a winding can be effectively shortened. A25 kW disc type axial magnetic field permanent magnet direct drive motor is developed by the cooperation of the American general automobile company and the Roman university, the motor adopts a water-cooling mode, more poles and larger motor outer diameters are selected in the design of the motor in order to obtain higher torque density and power density, the motor is designed to be flat, and an S10 type electric vehicle provided with the direct drive motor is tried for 1600 kilometers.
Experts and scholars in China have also conducted a great deal of research on disc-type axial magnetic field permanent magnet brushless motors. Two double-rotor permanent magnet disc type motors with the characteristics of high torque density and high efficiency are developed by a special motor research institute of Shenyang industrial university of Tongyi of Dongyi Yuntai, the power of the motor is 5kW, and the torque density reaches 1.18 Nm/kg. By applying a disc type permanent magnet synchronous motor to an electric automobile hub by the Wang Xiao Yuan, Chenjing and the like of Tianjin university, on the basis of analyzing the characteristic requirements of an electric automobile, the structure, the material and the characteristics of the motor, the disc type coreless permanent magnet synchronous motor is selected as a direct-drive motor of the electric automobile hub, and the magnetic steel of the motor adopts an HALBACH array structure to optimize the air gap magnetic density waveform. In 2015 wu da, liu shish and so on, disc motors were used for direct drive systems. The thickness of the prototype is far less than that of the permanent magnet synchronous traction machine, and the performance of the prototype is ideal. The wheel side direct-drive permanent magnet disc type motor is directly driven by the university of Tongji to be used for urban rail transit, and aiming at the problem of the wheel side motor driving system of the existing low-floor tramcar, the disc type permanent magnet motor technology is introduced into the rail car for the first time, and the technical scheme of the wheel side direct-drive independent wheel of the disc type permanent magnet synchronous motor is provided.
The disc type axial magnetic field permanent magnet brushless motor can be divided into four types of single-stator single-rotor, double-stator middle rotor, double-rotor middle single-stator and multi-disc type structures according to the basic topological structure of the disc type axial magnetic field permanent magnet brushless motor. The single stator and rotor permanent magnet motor with the axial magnetic field is simple in appearance and easy to manufacture; the structure of the double-stator middle rotor axial magnetic field permanent magnet motor is complex, but because one rotor disc is shared by two stators at the same time, the use of permanent magnets can be reduced, the loss is reduced, and in addition, the stators are arranged at the two sides of the rotor disc, so that the heat dissipation is facilitated; the double-rotor middle stator axial magnetic field permanent magnet motor is of a bilateral permanent magnet structure, permanent magnet materials can be fully utilized, larger torque can be generated under the same volume, the performance of the motor is improved, the multi-disc axial magnetic field permanent magnet motor is not common in real life, the motor with the structure is beneficial to reducing the cogging torque, and the manufacturing is difficult.
Compared with a single stator and single rotor, the structure of the double-rotor single-stator structure, also called a TORUS structure, improves the utilization rate of the permanent magnet of the motor, reduces the effective cost of the motor and better improves the uniformity of an air gap; due to the structural symmetry of the dual-rotor axial magnetic field motor, the magnetic pulling forces on the iron core stator are equal in magnitude and opposite in direction, so that the magnetic pulling forces are mutually offset, and the motor stability is good. At present, a double-rotor single-stator axial magnetic field motor is already applied to the fields of electric automobiles, hybrid electric automobiles, wind power generation and the like. A permanent magnet motor with an axial magnetic field and a yoke-free segmented armature (YASA) is a novel TORUS structure axial magnetic field motor, and is different from the traditional TORUS structure axial magnetic field motor in that a stator of the permanent magnet motor is in a yoke-free structure, and armatures are separated from each other, so that the using amount of iron cores is saved. In 2007, t.j.woolmer and m.d.mcculloch et al of oxford university first proposed a YASA motor, which is a novel axial magnetic field motor structure, in which the motor is a middle stator in appearance, and a double-rotor structure is provided at two sides, the stators are made of SMC material, no yoke is connected between them, and the axial magnetic field motor has a high slot filling rate and shorter winding ends, and the core loss of the axial magnetic field motor adopting the structure is greatly reduced, which is beneficial to the improvement of efficiency. In 2014, people of billows, yellow trivia and the like design a 1.5kW YASA motor, optimize the power density, the efficiency and the effective cost of the motor, and weaken the cogging torque of the motor by a magnetic pole offset method. In 2015, a YASA motor for megawatt level is designed by soktengvun and malcol d. In 2016, Zhang Bo scholars in China and T.Seidler scholars in Germany, and others, designed and analyzed the mechanical structure of YASA motor, and proposed that polyetheretherketone is used as the material for fixing stator SMC (as shown in FIGS. 1-14), which can withstand high temperature, and on this basis, copper pipes are installed for heat dissipation, so that the performance of the motor is optimized, and besides, the deformation force, pressure, tension and the like of the motor are also analyzed.
At the downstream production and manufacturing level, companies and enterprises specially developing and manufacturing YASA disc type axial magnetic field permanent magnet motors are established at home and abroad one after another. The German EMRAX company can produce YASA disc type axial magnetic field permanent magnet motors with various torque and rotating speed combinations and different cooling modes at present, the products are mainly developed for airplanes, and therefore the high-reliability YASA disc type axial magnetic field permanent magnet motors have the characteristics of high reliability, small weight, high power and high efficiency, and the peak power density of mainstream products can reach 8 kW/Kg. The England AVID technology company develops an EVO series YASA disc type axial magnetic field permanent magnet motor, the motor has extremely low rotational inertia, compared with the traditional motor, the motor can provide higher efficiency in a transient working period and improve the response speed of a driver, and the torque density of a mainstream product AF125 can reach 10Nm/Kg at most. YASA-750R, produced by YASA corporation, uk, as a perk in this field, is a low speed, high torque motor with leading torque and power density. The series of motors may provide a peak torque of 790Nm, a peak power of 200kW, and a speed range of 0-3250 rpm. High speed YASA axial flux machines produced by MAGNAX corporation, belgium, can provide peak power densities of up to 15kW/kg, with special systems to cool the windings to achieve the lowest stator temperatures. The English Ashwood design produces ELMO series YASA axial field permanent magnet motors, and the series of products can output 180Nm of torque at most. Domestic Zhonghao electric company and Shandong institute of precision magnetoelectric technology, Inc. have ploughed deeply in the field of YASA axial magnetic field permanent magnet motors for many years. YASA motor products developed by Zhonghao electric companies are applied to automobile generators and hybrid electric automobile driving motors, have the advantages of flat structure, short axial dimension, light weight and the like, effectively solve the problem of compact longitudinal space of a hybrid system, and the highest efficiency of the motor can reach more than 95%. Shandong MingIng magnetoelectricity technology research institute company Limited concentrates on the design and manufacture of electric automobile driving motors, the novel high-performance axial magnetic field permanent magnet brushless motor produced by the method makes major breakthrough in the key technology of Soft Magnetic Composite (SMC) iron core mould pressing, the single molding and manufacturing process of SMC iron cores and the assembly and manufacturing process of permanent magnet brushless motors, the peak power density of the motor reaches 5.341kW/kg (lasting 30s), the rated power density is 1.905kW/kg, and the method has the advantages of small volume, light weight, high power density and the like.
At present, the state is in the transformation stage of industrial development, a motor is taken as the most basic equipment component in industrial production, and the transformation and the upgrade of the motor play a great role in promoting the industry and even the whole national economy. The disc type axial magnetic field permanent magnet brushless motor has the advantages of high power density, high torque density, high efficiency, compact structure and the like, so that the disc type axial magnetic field permanent magnet brushless motor has higher application value and potential compared with the existing commonly used radial magnetic field structure permanent magnet brushless motor. The YASA axial magnetic field permanent magnet motor has more obvious advantages in the disc type axial magnetic field permanent magnet motor by combining the previous related research, the motor is of a double-rotor middle single-stator structure, the stator adopts a yoke-free block structure, the armatures are mutually separated, the using amount of the stator core is saved, the iron loss of the stator is reduced, and the efficiency is higher. However, as a new structure permanent magnet motor, the disc type axial magnetic field permanent magnet motor is more complex and special than the principle and structure of the traditional radial magnetic field permanent magnet motor, and still has great defects in the design, research, development, production and use processes, which limits the popularization of this type of motor. In order to further improve the performance of the disc-type axial magnetic field permanent magnet brushless motor and finally realize the industrialization and commercialization of the disc-type axial magnetic field permanent magnet brushless motor, the following problems need to be researched and solved:
1. the eddy current loss of the motor rotor. Similar to a traditional radial magnetic field permanent magnet motor, a rotor part of a disc type axial magnetic field permanent magnet brushless motor generally adopts two structures of a surface-mounted permanent magnet and an embedded permanent magnet. It is believed that the motor field is stationary relative to the rotor and therefore no eddy current losses are generated in the rotor part. In practice, however, the air gap magnetic conductance harmonic wave caused by the slotting of the motor stator and the harmonic wave in the armature magnetic field can cause large eddy current loss in the rotor permanent magnet, so that the temperature of the permanent magnet is rapidly increased, and the permanent magnet is subjected to irreversible demagnetization. The traditional permanent magnet blocking method has a certain effect on weakening eddy current loss of the permanent magnet, but along with the increase of the number of blocks, the processing difficulty is increased, the mechanical strength is reduced, and the output torque performance of the motor is also influenced. Especially for a multi-pole or high-speed motor, the permanent magnet blocking method cannot play a good role in weakening eddy current loss.
2. The manufacturing and processing technology of the disc type axial magnetic field permanent magnet brushless motor. Because the structural shape of the disc type axial magnetic field permanent magnet brushless motor is obviously different from that of the traditional radial magnetic field permanent magnet motor, a plurality of empirical formulas and graph curves for the design of the conventional motor are not suitable. Therefore, the design empirical formula of the disc-type axial magnetic field permanent magnet brushless motor must be summarized according to the specific structural characteristics of the motor. In addition, the structure of the disc type axial magnetic field permanent magnet brushless motor is more special and complex compared with the conventional motor, and the processing and manufacturing method is greatly different from the conventional motor, so the processing technology of the disc type axial magnetic field permanent magnet brushless motor is also a problem to be intensively researched and solved by the motor.
3. The problem of weak magnetic speed expansion of a disc type axial magnetic field permanent magnet brushless motor is solved. For application occasions such as electric automobiles, the motor generally requires a wider constant power area and a wider speed regulation range, the flat rotor structure space of the disc type axial magnetic field permanent magnet brushless motor is limited, the permanent magnet is generally installed in a surface-mounted or embedded structure, and the two rotor structures are not easy to weaken the magnetic field and expand the speed of the motor by regulating the stator current. For a surface-mounted permanent magnet rotor, because the magnetic permeability of a permanent magnet is close to the magnetic permeability of air, the quadrature-direct axis inductance of the surface-mounted permanent magnet rotor is equal, the equivalent air gap length of the motor is equal to the physical air gap plus the thickness of the permanent magnet, so the equivalent air gap is large, and the reaction demagnetization capacity of a quadrature-direct axis armature is very limited; the motor with the embedded permanent magnet rotor structure belongs to a salient pole motor, the quadrature axis inductance is larger than the direct axis inductance, so that the flux weakening speed expansion can be carried out by utilizing the asymmetry of the rotor magnetic circuit structure, but the difference of the quadrature axis inductance and the direct axis inductance is from the thickness of the permanent magnet, so that the difference of the quadrature axis inductance and the direct axis inductance is small, and the speed expansion capacity is limited.
Disclosure of Invention
Compared with the existing disc type axial magnetic field permanent magnet brushless motor, the disc type axial magnetic field permanent magnet brushless motor with the novel tangential magnet structure has the advantages that the eddy current loss of the rotor is greatly weakened, the efficiency is higher, the weak magnetic speed regulation capability is stronger, and therefore the disc type axial magnetic field permanent magnet brushless motor has good application value.
According to some embodiments, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a tangential magnet structure disc axial field permanent magnet brushless motor structure.
Tangential magnet structure disk axial magnetic field permanent magnet brushless motor structure includes: a rotor disk and a stator disk; the stator disc is axially sleeved along the rotating shaft and is positioned between the front rotor disc fixing section and the rear rotor disc fixing section; the front rotor disc fixing section and the rear rotor disc fixing section are both sleeved with rotor discs;
the rotor disc comprises a rotating disc, one surface of the rotating disc is additionally provided with a magnetic conduction plate, and the other surface of the rotating disc is embedded with a rotor magnetic pole and a rotor permanent magnet, the rotor magnetic pole and the rotor permanent magnet are alternately arranged along the circumferential direction, and the magnetizing directions of two adjacent rotor permanent magnets are opposite;
the stator disc includes a number of stator armatures.
Further, each stator armature comprises a stator armature core and an armature coil, and the armature coil is uniformly wound on the armature core.
Furthermore, the armature iron core is in a trapezoidal column structure and is formed by laminating a series of silicon steel sheets with different width specifications along the radial direction of the motor.
Furthermore, the magnetic poles of the rotor are in a convex structure with a narrow top and a wide bottom, and are segmented along the circumferential direction or the radial direction.
Furthermore, the rotor permanent magnet is of a T-shaped long strip structure with a wide upper part and a narrow lower part, and is magnetized along the tangential direction; the segmentation is performed in the circumferential direction or in the radial direction.
In a second aspect, the invention provides a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor.
Tangential magnet structure disk axial magnetic field permanent magnet brushless motor includes: an electromagnetic body portion and a mechanical portion; the electromagnetic body part adopts the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure described in the first aspect.
Furthermore, the mechanical part also comprises a rotating shaft, a bearing cover, an end cover, a shell and a stator sleeve; the bearing is connected with the bearing cover, the bearing cover is connected with the end cover through a bolt, the end cover is in interference fit with the bearing, and the end cover is connected with the shell through a bolt; the stator sleeve is sleeved in the casing and connected through a bolt.
Further, the rotating shaft comprises a shaft extension end, a front bearing section, a rear bearing section and an encoder section, wherein the front bearing section and the rear bearing section are in interference fit with the bearings; the shaft extension end is connected with a load; the encoder section is connected with the encoder.
In a third aspect, the invention provides an assembly method of a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor.
An assembly method of a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor comprises the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor of the second aspect, and comprises the following steps:
assembling the stator disc and the stator sleeve: firstly, inserting a stator glue pouring tool into a stator sleeve to form a semi-closed space in the stator sleeve; wiring the segmented stator armatures according to a wiring diagram, placing the whole stator disc into a stator sleeve after wiring is finished, positioning and fixing the stator in the stator sleeve, and ensuring that the difference between the circumferences of two adjacent stator armatures is 30-degree mechanical angle; injecting epoxy resin glue or other similar materials into the stator sleeve until the glue surface is flush with the stator; after the epoxy resin is cured, the stator glue pouring tool is drawn out, and the stator sleeve are tightly connected together;
assembling a rotor disc: putting a rotor magnetic pole into a rotating disc, wherein the narrow surface of the rotor magnetic pole is tightly attached to the rotating disc, and a round through hole in the rotor magnetic pole is aligned with a threaded hole in the rotating disc and is screwed into a bolt; one side of the segmented rotor permanent magnet is embedded into a groove formed by the rotor magnetic pole and the rotating disc; then, inserting another rotor magnetic pole to the other side of the permanent magnet and fixing the rotor magnetic pole with the rotating disc; the rest permanent magnets and the rotor magnetic poles are sequentially arranged in the rotating disc according to the sequence; aligning the circular through hole on the magnetic conduction plate with the bolt extending out of the back surface of the rotating disc, inserting and tightly attaching the magnetic conduction plate to the other surface of the rotating disc, and screwing in the nut for fixing;
assembling the rotor disc with a front rotor disc section of the rotating shaft: after the rotor disc is assembled, aligning a circular through hole on the inner periphery of the rotating disc with a threaded hole on a front rotor section of the rotating shaft, and screwing a bolt;
the assembling process of the rotor disc and the rear rotor disc segment of the rotating shaft is the same as the assembling process of the rotor disc and the front rotor disc segment of the rotating shaft.
In a fourth aspect, the invention provides a working method of a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor.
The working method of the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor adopts the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor of the second aspect, and comprises the following steps:
the permanent magnetic flux sequentially passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature, the air gap and the rotor magnetic pole, and then passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature, the air gap, the rotor magnetic pole and the permanent magnet to form a closed loop.
The above one or more technical solutions have the following beneficial effects:
1. the novel disc type axial magnetic field permanent magnet brushless motor with the tangential magnet structure, which is used in the technical scheme of the invention, expands the types of the axial magnetic field permanent magnet brushless motor, further improves the motor efficiency and is beneficial to promoting the improvement of the overall technical level of the axial magnetic field permanent magnet brushless motor.
2. The technical scheme of the invention solves the problem of rotor eddy current loss of the disc type axial magnetic field permanent magnet brushless motor. The invention adopts a rotor disc with a tangential magnet structure, permanent magnets are magnetized in the tangential direction, and rotor magnetic poles made of SMC materials are used as rotor magnetic conducting cores between adjacent permanent magnets. By adopting the tangential magnet structure, the sectional area of the permanent magnet along the magnetizing direction is smaller, in addition, the armature magnetic field of the motor can firstly enter the rotor magnetic pole of the SMC material, so that part of harmonic waves in the armature magnetic field are effectively inhibited before entering the permanent magnet, the eddy current loss in the permanent magnet is weakened, and meanwhile, the low eddy current loss coefficient of the SMC material also limits the eddy current loss in the rotor magnetic pole. Particularly, the rotor structure is also particularly suitable for a multi-pole number motor, and can play a good role in weakening the eddy current loss of the rotor of the multi-pole number disk type axial magnetic field permanent magnet brushless motor.
3. The technical scheme of the invention solves the technical problems of assembly and processing of the novel tangential magnet structure disc type axial magnetic field permanent magnet brushless motor. Aiming at the novel tangential magnet structure disc type axial magnetic field permanent magnet brushless motor, the assembly manufacturing method of the traditional radial magnetic field motor and the disc type axial magnetic field motor has limited practicability. Through the research on the motor stator assembling, rotor assembling and integral assembling methods, the technical scheme of the invention provides a whole set of assembling and manufacturing scheme aiming at the novel motor, and particularly the assembling and manufacturing method of the motor rotor has good reference significance for other types of axial magnetic field permanent magnet brushless motors.
4. The technical scheme of the invention can effectively improve the flux weakening and speed expanding capability of the axial magnetic field permanent magnet brushless motor. By adopting the tangential magnet structure, the difference of the magnetic resistance of the motor in the quadrature-direct axis is increased, the salient pole effect is more remarkable, and the flux weakening and speed expanding capability of the motor can be greatly improved.
5. Compared with the existing disc type axial magnetic field permanent magnet brushless motor, the disc type axial magnetic field permanent magnet brushless motor with the novel tangential magnet structure provided by the technical scheme of the invention has the advantages of low rotor eddy current loss, high efficiency, strong weak magnetic speed expansion capability and the like, and is favorable for further promoting the industrialization of the axial magnetic field permanent magnet brushless motor.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a sectional view showing the overall structure of the motor of the present invention;
FIG. 2 is a structural view of a rotating shaft of the motor of the present invention;
FIG. 3 is a structural view of a stator plate of the motor of the present invention;
FIG. 4 is a block diagram of a single stator armature of the motor of the present invention;
FIG. 5 is a view of the stator sleeve of the present invention;
FIG. 6 is a diagram of a stator potting fixture of the present invention;
FIG. 7 is a schematic view of the stator disc and stator sleeve assembly of the motor of the present invention;
FIG. 8 is a rotor disk structure of the present invention;
FIG. 9 is a view of a magnetic pole structure of a rotor according to the present invention;
FIG. 10 is a block schematic view of a rotor pole of the present invention;
FIG. 11 is a view of the permanent magnet structure of the rotor of the present invention;
FIG. 12 is a view showing the construction of a rotary disk of the present invention;
fig. 13 is a structural view of a magnetic conductive plate of the present invention;
FIG. 14 is a view showing the construction of the casing of the present invention;
FIG. 15 is a view of the end cap of the present invention;
FIG. 16 is a view of the bearing cap of the present invention;
FIG. 17 is a schematic view of the magnetic flux path of the main magnetic circuit of the motor of the present invention;
FIG. 18 is a stator coil wiring diagram in accordance with the present invention;
in the figure, 1, a rotating shaft, 2, a bearing cover, 3, a bearing, 4, an end cover, 5, a rotor disc of an electric motor, 6, a stator sleeve, 7, a stator disc of the electric motor and 8, a shell;
1-1, a shaft extension end, 1-2, a front bearing section, 1-3, a front rotor disc fixing section, 1-4, a rear rotor disc fixing section, 1-5, a rear bearing section, 1-6 and an encoder section;
5-1 parts of SMC material rotor magnetic poles, 5-2 parts of permanent magnets, 5-3 parts of rotating discs, 5-4 parts of magnetic conduction plates;
7-1, armature coil, 7-2 and armature core.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience of describing structural relationships of the parts or elements of the present invention, and are not intended to refer to any parts or elements of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be determined according to specific situations by persons skilled in the relevant scientific or technical field, and are not to be construed as limiting the present invention.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
Example one
The embodiment provides a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure.
Tangential magnet structure disk axial magnetic field permanent magnet brushless motor structure includes: a rotor disk and a stator disk; the stator disc is axially sleeved along the rotating shaft and is positioned between the front rotor disc fixing section and the rear rotor disc fixing section; the front rotor disc fixing section and the rear rotor disc fixing section are both sleeved with rotor discs;
the rotor disc comprises a rotating disc, one surface of the rotating disc is additionally provided with a magnetic conduction plate, and the other surface of the rotating disc is embedded with a rotor magnetic pole and a rotor permanent magnet, the rotor magnetic pole and the rotor permanent magnet are alternately arranged along the circumferential direction, and the magnetizing directions of two adjacent rotor permanent magnets are opposite;
the stator disc includes a number of stator armatures.
Specifically, the rotor disks of the motor are symmetrically distributed on two axial sides of the stator disk, and are respectively called a front rotor disk and a rear rotor disk, and the structural sizes of the two rotor disks are completely consistent and are respectively assembled and connected with a front rotor disk fixing section and a rear rotor disk fixing section of the rotating shaft.
The rotor disc of the motor comprises rotor magnetic poles, rotor permanent magnets, a rotating disc and magnetic conduction plates. The rotor disc adopts tangential magnet structure permanent magnets, rotor magnetic poles and rotor permanent magnets are alternately arranged along the circumferential direction, and the magnetizing directions of two adjacent rotor permanent magnets are opposite. The rotor magnetic poles and the permanent magnets are not firmly connected with each other only by the aid of the rotor magnetic poles and the permanent magnets, so that a rotating disc made of non-magnetic materials is required to be arranged to assemble and fix the rotor magnetic poles and the permanent magnets, and the rotor magnetic poles and the rotor permanent magnets are completely embedded in the rotating disc. Owing to lacked rotor yoke portion, certain magnetic screen ability has been lost to tangential magnet structure rotor dish, consequently can have the axial outside magnetic leakage problem, through install one deck magnetic conduction board additional at the rolling disc back, can form a magnetic screen mechanism, wherein the aluminium system rolling disc is low magnetic permeability part, and the magnetic conduction board is high magnetic permeability part, and the magnetic leakage field that passes the aluminium system rolling disc can be closed along magnetic conduction board part to make the magnetic leakage field reduce by a wide margin.
The rotor permanent magnet is of a T-shaped long strip structure with a wide upper part and a narrow lower part, and is magnetized along the tangential direction; in order to attenuate eddy current losses of the rotor permanent magnets while reducing the manufacturing costs of the permanent magnets, the permanent magnets are segmented in the radial direction.
The rotor magnetic pole is made of Soft Magnetic Composite (SMC) materials in a mould pressing mode, the rotor magnetic pole is of a convex structure with a narrow top and a wide bottom, and a through hole is formed in the center of the rotor magnetic pole and used for inserting a bolt to be connected with the rotating disc, and positioning and fixing the rotor magnetic pole. In addition, in order to weaken the eddy current loss of the rotor magnetic pole, the rotor magnetic pole can be segmented along the circumferential direction or the radial direction, and the mode of segmenting along the circumferential direction can effectively reduce the mould required for molding the rotor magnetic pole, thereby being beneficial to reducing the cost.
The rotating disc is made of aluminum alloy, and an annular groove is formed in the rotating disc and used for placing a rotor magnetic pole and a rotor permanent magnet; two groups of circular through holes are radially formed in the rotating disc, a group of threaded holes on the radial outer side are matched with the through holes of the rotor magnetic poles, and a group of circular through holes on the radial inner side are matched with the circular threaded holes in the rotor disc fixing section of the rotating shaft.
The magnetic conduction plate is made of non-oriented silicon steel sheets and is installed on the back of the rotating disc, the rotating disc is structurally an annular sheet, the thickness of the rotating disc is generally 1-3mm, and a circular through hole is formed in the magnetic conduction plate and matched with a threaded hole in the radial outer side of the rotating disc.
In order to reduce the axial leakage flux of the motor while maintaining the output torque capacity of the motor substantially constant, the thickness of the rotating disk should be significantly larger than the air gap length of the motor.
It should be further noted that the rotor disc of the tangential magnet structure can be popularized and applied to other various types of axial magnetic field permanent magnet motors, such as the axial magnetic field motor of the middle stator disc of the double-rotor disc related to the present invention, and also can be other topological types of axial magnetic field motors, wherein the stator disc can be a fractional slot winding motor, and also can be other winding structure types.
Example two
The embodiment provides a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor.
Tangential magnet structure disk axial magnetic field permanent magnet brushless motor includes: an electromagnetic body portion and a mechanical portion; the electromagnetic body part adopts the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure described in the first embodiment.
Specifically, fig. 1 is a cross-sectional view of the overall structure of the motor according to the embodiment. The machine comprises a main electromagnetic body part for generating electromagnetic energy exchange and a mechanical part for assembly and torque output.
The electromagnetic body part adopts a topological structure of a middle stator disc of a double-rotor disc and comprises two rotor discs 5 and a stator disc 7; the mechanical part includes: the rotor shaft comprises a rotating shaft 1, a bearing cover 2, a bearing 3, an end cover 4, a shell 8 and a stator sleeve 6.
The rotating shaft 1 is explained in sections with reference to fig. 2, and the rotating shaft 1 comprises a shaft extension end 1-1, a front bearing section 1-2, a front rotor disc fixing section 1-3, a rear rotor disc fixing section 1-4, a rear bearing section 1-5 and an encoder section 1-6.
Specifically, the shaft extension end 1-1 is used for connecting an output torque with a load; the front bearing section 1-2 and the rear bearing section 1-5 are respectively matched with the front bearing 3 and the rear bearing 3, and interference fit is adopted during assembly; the front rotor disk fixing section 1-3 and the rear rotor disk fixing section 1-4 are respectively matched with the front rotor disk 5 and the rear rotor disk 5, so that the transmission of torque from a motor to a rotating shaft is realized; the encoder sections 1-6 are connected with an encoder and output motor speed and rotor position data.
The stator disc of the motor of the embodiment adopts a structure of a yoke-free segmented armature and is composed of 12 segmented stator armatures as shown in fig. 3. Fig. 4 shows a single stator armature including a stator armature coil 7-1 and an armature core 7-2 on which armature coils are uniformly wound. The armature iron core is in a trapezoidal column structure and is formed by laminating a series of silicon steel sheets with different widths along the radial direction of the motor.
The stator sleeve of the motor of the embodiment is of a cylindrical structure as shown in fig. 5, a step is arranged on one side of the stator sleeve 6 close to the shaft extension end 1-1 and used for positioning and fixing a tool in the subsequent assembly process, and threaded holes are uniformly formed in the periphery of one side of the stator sleeve close to the shaft extension end 1-1.
The assembly combination of the motor stator disc 7 and the stator sleeve 6 will be described with reference to the assembly schematic diagram of fig. 7 and the stator potting tool shown in fig. 6: firstly, inserting a stator glue pouring tool shown in fig. 6 into a stator sleeve, and forming a semi-closed space in the stator sleeve; finishing wiring of the stator armature with finished winding shown in the figure 4 according to a wiring diagram, placing the whole stator disc into a stator sleeve after wiring is finished, positioning and fixing the stator disc in the stator sleeve, and ensuring that the difference between the circumferences of two adjacent stator armatures is 30-degree mechanical angle; injecting epoxy resin glue or other similar materials into the stator sleeve until the glue surface is submerged in the stator disc; and after the epoxy resin is cured, the stator glue pouring tool is drawn out, and the stator disc is tightly connected with the stator sleeve.
The rotor disc of the motor in the embodiment is shown in fig. 8 and comprises a rotor magnetic pole 5-1, a rotor permanent magnet 5-2, a rotating disc 5-3 and a magnetic conduction plate 5-4. The rotor disc adopts a tangential magnet structure, rotor magnetic poles and rotor permanent magnets are alternately arranged along the circumferential direction, and the magnetizing directions of two adjacent rotor permanent magnets are opposite. The rotor magnetic poles and the permanent magnets are not firmly connected with each other only by the aid of the rotor magnetic poles and the permanent magnets, so that a rotating disc made of non-magnetic materials is required to be arranged to assemble and fix the rotor magnetic poles and the permanent magnets, and the rotor magnetic poles and the rotor permanent magnets are completely embedded in the rotating disc. Owing to lacked rotor yoke portion, certain magnetic screen ability has been lost to tangential magnet structure rotor dish 5, consequently can have the axial outside magnetic leakage problem, through install one deck magnetic conduction board additional at the rolling disc back, can form a basic magnetic screen mechanism, wherein the aluminium rolling disc is low magnetic permeability part, and the magnetic conduction board is high magnetic permeability part, and the magnetic leakage field that passes the aluminium rolling disc can be closed along magnetic conduction board part to make the magnetic leakage field reduce by a wide margin.
The rotor magnetic pole is made of Soft Magnetic Composite (SMC) material by mould pressing and is in a convex structure with a narrow top and a wide bottom, and a through hole is formed in the center of the rotor magnetic pole 5-1 and used for inserting a bolt to be connected, positioned and fixed with the rotating disc 5-3. In addition, in order to reduce the eddy current loss of the rotor magnetic pole, the rotor magnetic pole can be segmented in the circumferential direction or the radial direction, as shown in fig. 10, and by adopting the manner of segmentation in the circumferential direction, the mould required for molding the rotor magnetic pole can be effectively reduced, which is beneficial to reducing the cost.
As shown in fig. 11, the rotor permanent magnet adopts a tangential magnet structure, and is integrally in a T-shaped long bar structure with a wide top and a narrow bottom, and the permanent magnet is magnetized along the tangential direction; in order to weaken the eddy current loss of the rotor permanent magnet and simultaneously reduce the manufacturing cost of the permanent magnet, the rotor permanent magnet is segmented along the radial direction, an example that the permanent magnet is divided into 3 segments along the radial direction is shown in fig. 11, and different segment numbers and segment forms can be considered in actual manufacturing according to needs and technical conditions.
As shown in fig. 12, the motor rotating disc is made of an aluminum alloy material, and an annular groove is formed in the rotating disc and used for placing a rotor magnetic pole 5-1 and a rotor permanent magnet 5-2; a group of threaded holes are formed in the radial outer side of the rotating disk and matched with through holes in the rotor magnetic poles, and a group of circular through holes in the radial inner side of the rotating disk are matched with circular threaded holes in the front rotor disk fixing section 1-3 and the rear rotor disk fixing section 1-4 of the rotating shaft 1. In order to reduce the axial leakage flux of the motor while maintaining the output torque capacity of the motor substantially constant, the thickness of the rotating disk should be significantly larger than the air gap length of the motor.
As shown in fig. 13, the magnetic conductive plate is made of non-oriented silicon steel sheets and is installed on the back of the rotating disc, the rotating disc is an annular sheet in structure, the thickness of the rotating disc is generally 1-3mm, and the magnetic conductive plate is provided with a circular through hole which is matched with a threaded hole on the radial outer side of the rotating disc 5-3.
The assembly process of the rotor disk is explained in connection with fig. 8 as follows: firstly, a rotor magnetic pole 5-1 is placed in a rotating disc 5-3, the narrow surface of the rotor magnetic pole is tightly attached to the rotating disc, a round through hole in the rotor magnetic pole is aligned with a threaded hole in the rotating disc and then a bolt is screwed in, and the length of the bolt is ensured to be capable of extending out of the rotating disc and a magnetic conduction plate 5-4; one side of the segmented permanent magnet 5-2 is embedded into a groove formed by the rotor magnetic pole and the rotating disc; then, inserting another rotor magnetic pole to the other side of the permanent magnet and fixing the rotor magnetic pole with the rotating disc; and sequentially installing the rest permanent magnets and the rotor magnetic poles in the rotating disc according to the sequence, and then firmly adhering the permanent magnets to the rotating disc in an adhesive mode. The circular through hole on the magnetic conduction plate is aligned with the bolt extending out of the back surface of the rotating disc, the magnetic conduction plate is inserted into and tightly attached to the back surface of the rotating disc, and the magnetic conduction plate is screwed into the nut for fixing.
After the assembly combination of the stator disc and the stator sleeve and the assembly of the two rotor discs are completed, a subsequent overall assembly process can be carried out. Heretofore, the mechanical components other than the rotating shaft and the stator sleeve will be described with reference to the drawings.
As shown in fig. 14, a step is provided inside one side of the motor casing, circular through holes are uniformly provided on the step, and threaded holes are uniformly provided on two sides of the periphery of the casing.
As shown in fig. 15, the motor end cover has a circular through hole on the outer circumference and a circular threaded hole on the inner circumference, a step on the outer circumference of the end cover is used for positioning with the housing, and the end cover is provided with a semi-open bearing chamber for positioning and fixing one side of the bearing.
As shown in fig. 16, the motor bearing cover is provided with a circular through hole at the periphery thereof, and a groove in the bearing cover can position and fix the other side of the bearing and forms a closed bearing chamber together with a semi-open bearing chamber in the end cover.
The working principle of the motor of the embodiment is explained with reference to fig. 17: the permanent magnetic flux sequentially passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature core, the air gap and the rotor magnetic pole, and then passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature core, the air gap, the rotor magnetic pole and the permanent magnet to form a closed loop. The polarities of two adjacent rotor poles in the circumferential direction are opposite. When the rotor disc 5 rotates, magnetic flux in the stator armature core 7-2 is alternated, and induced electromotive force is induced in the armature coil 7-1 wound on the stator armature core. When the stator winding is electrified with alternating current, an armature magnetic field is formed and interacts with a magnetic field generated by the rotor disc to generate synchronous electromagnetic torque, so that the motor is driven to rotate.
According to the practical application requirement, the 12 stator armature coils of the motor can be connected according to two wiring modes shown in fig. 18, namely a winding one-path serial connection wiring scheme and a winding two-path parallel connection wiring scheme.
EXAMPLE III
The embodiment provides an assembling method of a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor.
The assembly method of the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor comprises the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor described in the second embodiment, and comprises the following steps:
assembling the stator disc and the stator sleeve: firstly, inserting a stator glue pouring tool into a stator sleeve to form a semi-closed space in the stator sleeve; wiring the segmented stator armatures according to a wiring diagram, placing the whole stator disc into a stator sleeve after wiring is finished, positioning and fixing the stator in the stator sleeve, and ensuring that the difference between the circumferences of two adjacent stator armatures is 30-degree mechanical angle; injecting epoxy resin glue or other similar materials into the stator sleeve until the glue surface is flush with the stator; after the epoxy resin is cured, the stator glue pouring tool is drawn out, and the stator sleeve are tightly connected together;
assembling a rotor disc: putting a rotor magnetic pole into a rotating disc, wherein the narrow surface of the rotor magnetic pole is tightly attached to the rotating disc, and a round through hole in the rotor magnetic pole is aligned with a threaded hole in the rotating disc and is screwed into a bolt; one side of the segmented rotor permanent magnet is embedded into a groove formed by the rotor magnetic pole and the rotating disc; then, inserting another rotor magnetic pole to the other side of the permanent magnet and fixing the rotor magnetic pole with the rotating disc; the rest permanent magnets and the rotor magnetic poles are sequentially arranged in the rotating disc according to the sequence; aligning the circular through hole on the magnetic conduction plate with the bolt extending out of the back surface of the rotating disc, inserting and tightly attaching the magnetic conduction plate to the other surface of the rotating disc, and screwing in the nut for fixing;
assembling the rotor disc with a front rotor disc section of the rotating shaft: after the rotor disc is assembled, aligning a circular through hole on the inner periphery of the rotating disc with a threaded hole on a front rotor section of the rotating shaft, and screwing a bolt;
the assembling process of the rotor disc and the rear rotor disc segment of the rotating shaft is the same as the assembling process of the rotor disc and the front rotor disc segment of the rotating shaft.
Assembling the stator sleeve with the shell: the stator sleeve is inserted into the casing, the circular threaded hole in the stator sleeve is aligned with the circular through hole in the casing, and the bolt is screwed in.
Assembling a bearing and a front end cover: and pressing the bearing into a semi-open bearing chamber of the front end cover, wherein the bearing and the end cover are in interference fit.
The front bearing chamber is closed: and tightly fastening the bearing cover on the bearing, aligning the circular through hole on the bearing cover with the circular threaded hole on the inner periphery of the front end cover, and screwing the bolt.
Assembling a bearing and a front bearing section of the rotating shaft: and inserting the rotating shaft into the front bearing chamber until the rotating shaft cannot advance continuously, wherein the side, close to the front end cover, of the bearing inner ring is abutted against the step of the front bearing section of the rotating shaft.
Assembling a front end cover and a shell: the front end cover is inserted into the shell, the step in the end cover plays a positioning role, the circular through hole in the periphery of the end cover is aligned with the threaded hole in the periphery of the shell, and the bolt is screwed in.
The subsequent assembly method is consistent with what is described in the above section, and only the subsequent assembly steps are listed here:
the rotor disc is assembled with the rear rotor disc section of the rotating shaft;
assembling a bearing and a rear end cover;
the rear bearing chamber is closed;
the bearing is assembled with the rear bearing section of the rotating shaft;
the rear end cover is assembled with the shell.
Example four
The embodiment provides a working method of a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor.
The working method of the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor, which adopts the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor described in the second embodiment, includes:
the permanent magnetic flux sequentially passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature, the air gap and the rotor magnetic pole, and then passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature, the air gap, the rotor magnetic pole and the permanent magnet to form a closed loop.
The polarities of two adjacent rotor poles in the circumferential direction are opposite. When the rotor disc 5 rotates, magnetic flux in the stator armature core 7-2 is alternated, and induced electromotive force is induced in the armature coil 7-1 wound on the stator armature core.
When the stator winding is electrified with alternating current, an armature magnetic field is formed and interacts with a magnetic field generated by the rotor disc to generate synchronous electromagnetic torque, so that the motor is driven to rotate.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. Tangential magnet structure disk axial magnetic field permanent magnet brushless motor structure, its characterized in that includes: a rotor disk and a stator disk; the stator disc is axially sleeved along the rotating shaft and is positioned between the front rotor disc fixing section and the rear rotor disc fixing section; the front rotor disc fixing section and the rear rotor disc fixing section are both sleeved with rotor discs;
the rotor disc comprises a rotating disc, rotor magnetic poles, rotor permanent magnets and magnetic conducting plates, the magnetic conducting plates are additionally arranged on one surface of the rotating disc, the rotor magnetic poles and the rotor permanent magnets are embedded in the other surface of the rotating disc, the rotor magnetic poles and the rotor permanent magnets are alternately arranged along the circumferential direction, and the magnetizing directions of the two adjacent rotor permanent magnets are opposite;
the stator disc includes a number of stator armatures.
2. A tangential magnet structure disc axial field permanent magnet brushless motor structure as claimed in claim 1, wherein each stator armature comprises a stator armature core and an armature coil, the armature coil being uniformly wound on the armature core.
3. The structure of a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor according to claim 2, characterized in that the armature core is in a trapezoidal column structure and is formed by laminating a series of silicon steel sheets with different width specifications along the radial direction of the motor.
4. The tangential magnet structure disc axial field permanent magnet brushless motor structure of claim 1, wherein the rotor poles are in a convex structure with narrow top and wide bottom, and are segmented along the circumferential direction or the radial direction.
5. The structure of the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor according to claim 1, wherein the rotor permanent magnet is a T-shaped long strip structure with a wide upper part and a narrow lower part, and is magnetized along the tangential direction; the segmentation is performed in the circumferential direction or in the radial direction.
6. Tangential magnet structure disk axial magnetic field permanent magnet brushless motor, its characterized in that includes: an electromagnetic body portion and a mechanical portion; the electromagnetic body part adopts a tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure as claimed in any one of claims 1-5.
7. The tangential magnet structure disc axial field permanent magnet brushless motor of claim 6, wherein the mechanical portion further comprises a shaft, bearings, bearing caps, end caps, a housing, and a stator sleeve; the bearing is connected with the bearing cover, the bearing cover is connected with the end cover through a bolt, the end cover is in interference fit with the bearing, and the end cover is connected with the shell through a bolt; the stator sleeve is sleeved in the casing and connected through a bolt.
8. The tangential magnet structure disc axial field permanent magnet brushless motor of claim 7, wherein the shaft comprises a shaft extension end, a front bearing section, a rear bearing section and an encoder section, the front bearing section and the rear bearing section are in interference fit with the bearings; the shaft extension end is connected with a load; the encoder section is connected with the encoder.
9. A method of assembling a tangential magnet structure disc axial field permanent magnet brushless motor, comprising the tangential magnet structure disc axial field permanent magnet brushless motor of any of claim 6, comprising:
assembling the stator disc and the stator sleeve: firstly, inserting a stator glue pouring tool into a stator sleeve to form a semi-closed space in the stator sleeve; wiring the segmented stator armatures according to a wiring diagram, placing the whole stator disc into a stator sleeve after wiring is finished, positioning and fixing the stator in the stator sleeve, and ensuring that the difference between the circumferences of two adjacent stator armatures is 30-degree mechanical angle; injecting epoxy resin glue or other similar materials into the stator sleeve until the glue surface is flush with the stator; after the epoxy resin is cured, the stator glue pouring tool is drawn out, and the stator sleeve are tightly connected together;
assembling a rotor disc: putting a rotor magnetic pole into a rotating disc, wherein the narrow surface of the rotor magnetic pole is tightly attached to the rotating disc, and a round through hole in the rotor magnetic pole is aligned with a threaded hole in the rotating disc and is screwed into a bolt; one side of the segmented rotor permanent magnet is embedded into a groove formed by the rotor magnetic pole and the rotating disc; then, inserting another rotor magnetic pole to the other side of the permanent magnet and fixing the rotor magnetic pole with the rotating disc; the rest permanent magnets and the rotor magnetic poles are sequentially arranged in the rotating disc according to the sequence; aligning the circular through hole on the magnetic conduction plate with the bolt extending out of the back surface of the rotating disc, inserting and tightly attaching the magnetic conduction plate to the other surface of the rotating disc, and screwing in the nut for fixing;
assembling the rotor disc with a front rotor disc section of the rotating shaft: after the rotor disc is assembled, aligning a circular through hole on the inner periphery of the rotating disc with a threaded hole on a front rotor section of the rotating shaft, and screwing a bolt;
the assembling process of the rotor disc and the rear rotor disc segment of the rotating shaft is the same as the assembling process of the rotor disc and the front rotor disc segment of the rotating shaft.
10. The working method of the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor adopts the tangential magnet structure disc type axial magnetic field permanent magnet brushless motor of claim 6, and is characterized by comprising the following steps:
the permanent magnetic flux sequentially passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature, the air gap and the rotor magnetic pole, and then passes through the permanent magnet, the rotor magnetic pole, the air gap, the stator armature, the air gap, the rotor magnetic pole and the permanent magnet to form a closed loop.
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| WO2024054166A1 (en) * | 2022-09-07 | 2024-03-14 | Adiyaman Üni̇versi̇tesi̇ Rektörlüğü | Brushless electric dc motor with hybrid rotor |
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