CN111355323A - Disk type motor rotor with pole shoe composite magnetic pole structure - Google Patents
Disk type motor rotor with pole shoe composite magnetic pole structure Download PDFInfo
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- CN111355323A CN111355323A CN202010338325.6A CN202010338325A CN111355323A CN 111355323 A CN111355323 A CN 111355323A CN 202010338325 A CN202010338325 A CN 202010338325A CN 111355323 A CN111355323 A CN 111355323A
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- rotor
- pole
- pole shoe
- permanent magnet
- composite
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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
-
- 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
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a disk type motor rotor with a pole shoe composite magnetic pole structure, and relates to the field of motors; the rotor comprises a rotor supporting disk with a central opening, wherein one side surface of the rotor supporting disk is provided with a groove, and the groove is used for mounting a rotor iron core and a composite magnetic pole; the rotor iron core is of an annular structure, is arranged at the bottom of the groove and is tightly attached to the rotor supporting disk, and T-shaped baffles distributed along the radial direction are arranged on the surface of one side of the rotor iron core, which is far away from the rotor supporting disk, and divide the rotor iron core into a plurality of fan-shaped spaces at equal intervals along the circumference; the composite magnetic pole is arranged in the fan-shaped space on the rotor core; the composite magnetic pole comprises a permanent magnet and a pole shoe, wherein the pole shoe made of composite soft magnetic materials is arranged on the surface of the permanent magnet. The pole shoe on the surface of the permanent magnet can adjust the radian of the permanent magnet, generate sine wave air gap flux density, enable the output torque of the motor to be smooth, simultaneously protect the permanent magnet from losing magnetism under the action of a demagnetizing field, improve the field weakening capability of the motor, be easy to process and be suitable for batch production.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a disc type motor rotor with a pole shoe composite magnetic pole structure.
Background
Most of disc type motor rotor permanent magnets adopt a surface-mounted structure, the permanent magnets directly face a stator core, a harmonic magnetic field in an air gap magnetic field can generate an eddy current effect on the permanent magnets to cause the permanent magnets to generate heat, and even a demagnetizing field caused by a large current at the moment of short circuit or other fault working conditions directly acts on the permanent magnets, so that the permanent magnets generate a demagnetizing phenomenon, and the performance of the motor is reduced or even the motor cannot run. In addition, the thickness of the permanent magnet is equivalent to an air gap, and the alternating-direct axis inductance of the stator winding is very close, so that the weak magnetic capacity of the motor is poor.
Disclosure of Invention
The invention aims to provide a disk type motor rotor with a pole shoe composite magnetic pole structure, which aims to solve the problems in the prior art, protect permanent magnets from being influenced by demagnetization, improve the weak magnetic capacity of a motor, is easy to process and realize and is suitable for batch production.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a disc type motor rotor with a pole shoe composite magnetic pole structure, which comprises a rotor supporting disc with a disc-shaped cross section and an opening in the center, wherein a groove with a basin-shaped structure is formed in the surface of one side of the rotor supporting disc and is used for mounting a rotor iron core and a composite magnetic pole; the rotor core is of an annular structure, is arranged at the bottom of the groove and is tightly attached to the rotor supporting disk, a plurality of T-shaped baffles distributed along the radial direction are uniformly arranged on the surface of one side, away from the rotor supporting disk, of the rotor core, and the T-shaped baffles divide the rotor core into a plurality of fan-shaped spaces at equal intervals along the circumference; the composite magnetic poles are arranged in a plurality of fan-shaped spaces on the rotor core; the compound magnetic pole comprises a permanent magnet, and a pole shoe is arranged on the surface of the permanent magnet.
Optionally, the lower surface of the permanent magnet is attached to the bottom surface of the rotor core, and the upper surface of the permanent magnet is attached to the lower surface of the pole shoe; the height of the compound magnetic pole is equal to that of the T-shaped baffle.
Optionally, the T-shaped baffle includes a vertical plate connected to the rotor core, and a horizontal limiting plate is connected to an end of the vertical plate; two sides of the upper surface of the pole shoe of the composite magnetic pole are respectively contacted with the horizontal limiting plate of the T-shaped baffle; the upper surface of the pole shoe is of a smooth arc-shaped protruding structure, horizontal transition portions are symmetrically arranged on two sides of the arc-shaped protruding structure, and the width of each horizontal transition portion is equal to half of the width of the horizontal limiting plate.
Optionally, the inner side of the rotor core is connected with a fixing ring, and the fixing ring is located between the inner side surface of the groove and the bottom of the composite magnetic pole.
Optionally, a first through hole is formed in the composite magnetic pole, a second through hole is formed in the rotor core, a threaded hole is formed in the rotor supporting disk, the first through hole, the second through hole and the threaded hole are arranged oppositely, and a bolt or a rivet is fixedly arranged in the first through hole, the second through hole and the threaded hole in a penetrating mode.
Optionally, the rotor core is formed by winding a high-permeability silicon steel strip, or is manufactured by using an amorphous silicon steel strip.
Optionally, the rotor supporting disk is made of high-strength aluminum alloy, and an annular raised baffle is arranged on the outer circumference of one side of the rotor supporting disk, which is provided with the groove; the fixing ring is arranged on the inner side wall of the groove and abuts against the inner side surface of the rotor iron core; the annular protruding baffle and the fixing ring can limit the radial sliding of the rotor core together.
Optionally, the pole shoe is a composite soft magnetic material pole shoe, namely an SMC pole shoe; the pole shoe surface is in the shape of an eccentric air gap.
Optionally, the two pole shoes with the same structure are symmetrically arranged on the surfaces of the two sides of the permanent magnet, and the radian of the surfaces of the pole shoes can be adjusted; the pole shoe can isolate the eddy current effect of high-frequency harmonic waves on the permanent magnet, and prevent eddy current heating and demagnetization of the permanent magnet.
Compared with the prior art, the invention has the following technical effects:
the invention has strong engineering implementation, the rotor assembly limits the axial and tangential movement of the permanent magnet by adopting a T-shaped baffle, a screw or rivet fixing mode, has reliable structural strength, can effectively prevent the compound magnetic pole from being thrown out when the rotor rotates at high speed, does not need to adopt the processes of sticking and the like to fix the permanent magnet and the pole shoe, simplifies the batch production process and effectively saves the batch production time; in the composite magnetic pole structure with the pole shoes of the disc type motor, the pole shoes are made of SMC materials, the SMC has the advantages of good magnetic conductivity, easiness in forming and processing and the like, the SMC can be processed into a shape with an eccentric air gap on the surface, and the permanent magnet and the SMC composite magnetic pole can form a sine wave air gap magnetic density waveform, so that the sine degree of an air gap magnetic field is improved, the torque fluctuation index of the motor is reduced, and the NVH performance of the motor is improved; the radian of the pole shoe can be adjusted according to the requirement, the harmonic content in the motor is reduced, the eddy current effect generated in the permanent magnet is effectively reduced, and the permanent magnet is protected from being demagnetized under the action of a demagnetizing field; due to the use of the SMC composite magnetic pole, the AC-DC axis inductance of the motor is different, and the flux weakening capability of the motor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of a composite pole structure with pole pieces according to a first embodiment;
FIG. 2 is a schematic view of a rotor core structure according to an embodiment;
FIG. 3 is a schematic structural diagram of a rotor core with embedded composite magnetic poles according to an embodiment;
FIG. 4 is a partial cross-sectional view of a composite magnetic pole of one embodiment of the present invention shown engaged with a rotor support disk after it is inserted into a rotor core;
FIG. 5 is a partial structural view of a composite pole with pole shoes according to a second embodiment;
FIG. 6 is a schematic view of a composite pole structure with pole pieces according to a second embodiment;
FIG. 7 is a schematic structural diagram of a rotor of a disk motor having a pole shoe composite magnetic pole structure according to a second embodiment;
FIG. 8 is a cross-sectional view of a rotor of a disk motor having pole shoe composite magnetic pole structure according to a second embodiment;
the rotor comprises a rotor core 1, a T-shaped baffle 2, a pole shoe composite magnetic pole 3, a permanent magnet 301, a pole shoe 302, a horizontal transition part 303, a rotor supporting disc 4, a fixing ring 5, a bolt 6, an annular raised baffle 7, a first through hole 8, a second through hole 9, a threaded hole 10 and an annular baffle 11.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a disk type motor rotor with a pole shoe composite magnetic pole structure, which aims to solve the problems in the prior art, protect permanent magnets from being influenced by demagnetization, improve the weak magnetic capacity of a motor, is easy to process and realize and is suitable for batch production.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
The invention provides a disc type motor rotor with a pole shoe composite magnetic pole structure, which comprises a rotor core 1 with an annular structure, wherein the rotor core 1 can be formed by winding a silicon steel strip, the rotor core 1 is provided with a plurality of T-shaped baffles 2, and the rotor core 1 is divided into a plurality of sector spaces along the circumference by the T-shaped baffles 2; the pole shoe composite magnetic pole 3 is inserted into the fan-shaped space between the two T-shaped baffles 2 along the radial direction. The rotor supporting disk 4 is arranged into a disk shape with a central opening, the upper surface of the rotor supporting disk is arranged into a groove with a basin-shaped structure, a rotor iron core assembly (containing magnetic poles) is placed in the groove of the rotor supporting disk 4, the outer side surface of the groove with the basin-shaped structure is used for limiting the radial outward movement of the rotor iron core assembly, a fixing ring is arranged close to the inner side wall of the basin-shaped structure groove, and the radial inward movement of the rotor iron core assembly is limited by a fixing ring; in addition, the rotor core 1, the pole shoe composite magnetic pole 3 and the rotor supporting disk 4 are all provided with holes, and the rotor core 1, the pole shoe composite magnetic pole 3 and the rotor supporting disk 4 are fastened together by bolts 6 or rivets. An annular raised baffle 7 is arranged on the outer circumference of one side of the rotor supporting disk 4 with the groove; the fixing ring 5 is arranged on the inner side wall of the groove and abuts against the inner side surface of the rotor core 1; the annular convex baffle 7 and the fixed ring 5 can limit the radial sliding of the rotor core 1 together; the rotor core 1 is provided with N T-shaped baffles 2 along the radial direction, N is an odd number, and the rotor core 1 is divided into M fan-shaped spaces, and M is an even number; the pole shoe composite magnetic pole 3 is of a two-layer composite structure, the front section of the pole shoe composite magnetic pole is fan-shaped, and the lower layer of the pole shoe composite magnetic pole is a permanent magnet 301; the upper layer is a pole shoe 302 made of SMC, or the pole shoe 302 made of other materials with good magnetic conductivity, such as silicon steel sheets, amorphous silicon steel sheets and the like; the upper layer is arranged into an arc-shaped pole shoe structure; the radian r of the arc can be adjusted according to design requirements so as to obtain the required sinusoidal air gap magnetic field. The upper surface of the pole shoe 302 is of an arc-shaped convex structure, horizontal transition parts 303 are arranged on two side faces of the pole shoe, the width D of each horizontal transition part 303 is equal to half of the width D of a horizontal limiting plate of the T-shaped baffle 2 at the notch of the rotor core 1, and the height H of the pole shoe composite magnetic pole 3 is equal to the height H of the T-shaped baffle 2, so that the requirement of assembly and fixation is better met.
The lower surface of a permanent magnet 301 of the pole shoe composite magnetic pole 3 is attached to the surface of the rotor core 1, the upper surface of the permanent magnet 301 is attached to the lower surface of a pole shoe 302, and the height of the pole shoe composite magnetic pole 3 is equal to that of the T-shaped baffle 2. During assembly, the pole shoe composite magnetic pole 3 is inserted into the sector space of the rotor core 1 along the radial direction and then assembled with the rotor support disk 4 to form a rotor assembly; the outer arc circumference of the pole shoe composite magnetic pole 3 is abutted against the inner surface of the annular bulge of the rotor supporting disk 4, and the inner arc surface of the pole shoe composite magnetic pole 3 is abutted against the outer side of the fixing ring 5; in order to limit the axial movement of the rotor core assembly, a first through hole 8 is formed in the center of the pole shoe composite magnetic pole 3, a second through hole 9 is formed in the position, opposite to the first through hole 8, of the rotor core 1, threaded holes 10 are formed in the positions, corresponding to the first through hole 8 and the second through hole 9, of the rotor supporting disk 4, and the pole shoe composite magnetic pole 3, the rotor core 1 and the rotor supporting disk 4 which are composed of the permanent magnet 301 and the pole shoe 302 can be fixed through bolts 6.
During assembly, the pole shoe 302 is firstly attached to the permanent magnet 301 and then inserted into a fan-shaped space formed by two adjacent T-shaped baffles 2 of the rotor core 1 from outside to inside along the radial direction, and the shape of the pole shoe composite magnetic pole 3 is matched with the fan-shaped space of the rotor core 1. Then put into rotor supporting disk 4's recess with the iron core subassembly that assembles to rotor core 1's outer lane and the laminating of the cyclic annular protruding baffle 7 of rotor supporting disk 4's lateral surface mutually, reuse bolt 6 fastens the three through first through-hole 8, second through-hole 9 and screw hole 10 this moment. Further, reuse solid fixed ring 5 along the medial surface embedding rotor supporting disk 4 of recess, solid fixed ring 5 is inseparable with the inboard laminating of recess. And fixing the fixing ring 5 by using a positioning pin or a screw, so that the whole rotor assembly is assembled. The T-shaped baffle 2 and the bolt 6 of the rotor core 1 are utilized to limit the axial movement of the rotor assembly together so as to adapt to the axial electromagnetic force of the high-speed rotation of the motor.
The invention utilizes the advantages of good magnetic conductivity, easy forming and processing and the like of SMC materials (composite soft magnetic materials), SMC can be freely processed into pole shoes with eccentric air gap shapes on the surface, the composite magnetic poles of the permanent magnets and the pole shoes can form sine wave air gap flux density waveforms, and the radian of the composite magnetic poles of the pole shoes can be adjusted according to requirements so as to further improve the sine degree of an air gap magnetic field, the composite magnetic poles of the permanent magnets and the pole shoes can form sine wave air gap flux density waveforms so as to reduce the harmonic content in the motor, and the pole shoes can protect the permanent magnets from generating an eddy current effect or being subjected to a demagnetizing field effect in the permanent magnets, thereby greatly reducing the output torque fluctuation of the motor. The rotor structure with the pole shoes made of the magnetic conductive material ensures that the alternating-direct axis inductance of the motor is different, the weak magnetic capacity of the motor is improved, and the rotor component structure is easy to process and realize and is suitable for batch production.
Example two
As shown in fig. 5, 6, 7 and 8, in another embodiment, the rotor support disk 4 is made of a non-magnetic aluminum alloy material, so that the rotor core in the first embodiment is omitted, the pole shoes 302 with the same structure are arranged on both sides of the permanent magnet of the pole shoe composite magnetic pole 3, i.e., the double-side pole shoe structure, the sections of the rotor support disk 4 and the annular baffle plate 11 are symmetrically arranged, the pole shoe composite magnetic pole 3 can be effectively fixed by adopting a screw or rivet fastening structure, the rotor structure with the pole shoes made of a magnetic conductive material enables the cross-axis and direct-axis inductances of the motor to be different, the weak magnetic capacity of the motor is improved, the pole shoes isolate the eddy current effect of the high-frequency harmonic magnetic field on the permanent.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. A disk type motor rotor with a pole shoe composite magnetic pole structure is characterized in that: the rotor comprises a rotor supporting disk with a disc-shaped cross section and an opening at the center, wherein a groove with a basin-shaped structure is formed in the surface of one side of the rotor supporting disk and used for mounting a rotor iron core and a composite magnetic pole; the rotor core is of an annular structure, is arranged at the bottom of the groove and is tightly attached to the rotor supporting disk, a plurality of T-shaped baffles distributed along the radial direction are uniformly arranged on the surface of one side, away from the rotor supporting disk, of the rotor core, and the T-shaped baffles divide the rotor core into a plurality of fan-shaped spaces at equal intervals along the circumference; the composite magnetic poles are arranged in a plurality of fan-shaped spaces on the rotor core; the compound magnetic pole comprises a permanent magnet, and a pole shoe is arranged on the surface of the permanent magnet.
2. A disc motor rotor with pole shoe composite pole structure as set forth in claim 1, wherein: the lower surface of the permanent magnet is attached to the bottom surface of the rotor core, and the upper surface of the permanent magnet is attached to the lower surface of the pole shoe; the height of the compound magnetic pole is equal to that of the T-shaped baffle.
3. A disc motor rotor with pole shoe composite pole structure as set forth in claim 2, wherein: the T-shaped baffle comprises a vertical plate connected with the rotor core, and a horizontal limiting plate is connected to the end part of the vertical plate; two sides of the upper surface of the pole shoe of the composite magnetic pole are respectively contacted with the horizontal limiting plate of the T-shaped baffle; the upper surface of the pole shoe is of a smooth arc-shaped protruding structure, horizontal transition portions are symmetrically arranged on two sides of the arc-shaped protruding structure, and the width of each horizontal transition portion is equal to half of the width of the horizontal limiting plate.
4. A disc motor rotor with pole shoe composite pole structure as set forth in claim 1, wherein: the inboard of rotor core is connected with solid fixed ring, gu fixed ring is located the recess medial surface with between the compound magnetic pole bottom.
5. A disc motor rotor with pole shoe composite pole structure as set forth in claim 1, wherein: the composite magnetic pole is provided with a first through hole, the rotor core is provided with a second through hole, the rotor supporting disk is provided with a threaded hole, the first through hole, the second through hole and the threaded hole are oppositely arranged, and a bolt or a rivet is fixedly arranged in the first through hole, the second through hole and the threaded hole in a penetrating mode.
6. A disc motor rotor with pole shoe composite pole structure as set forth in claim 1, wherein: the rotor core is formed by winding a high-permeability silicon steel strip or is manufactured by using an amorphous silicon steel strip.
7. A disc motor rotor with pole shoe composite pole structure as set forth in claim 4, wherein: the rotor supporting disk is made of high-strength aluminum alloy, and an annular raised baffle is arranged on the outer circumference of one side of the rotor supporting disk, which is provided with the groove; the fixing ring is arranged on the inner side wall of the groove and abuts against the inner side surface of the rotor iron core; the annular protruding baffle and the fixing ring can limit the radial sliding of the rotor core together.
8. A disc motor rotor with pole shoe composite pole structure as set forth in claim 1, wherein: the pole shoe is made of a composite soft magnetic material; the pole shoe surface is in the shape of an eccentric air gap.
9. A disc motor rotor with pole shoe composite pole structure as set forth in claim 1, wherein: the two pole shoes with the same structure are symmetrically arranged on the surfaces of the two sides of the permanent magnet, and the radian of the surfaces of the pole shoes can be adjusted; the pole shoe can isolate the eddy current effect of high-frequency harmonic waves on the permanent magnet, and prevent eddy current heating and demagnetization of the permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338325.6A CN111355323A (en) | 2020-04-26 | 2020-04-26 | Disk type motor rotor with pole shoe composite magnetic pole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010338325.6A CN111355323A (en) | 2020-04-26 | 2020-04-26 | Disk type motor rotor with pole shoe composite magnetic pole structure |
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| Publication Number | Publication Date |
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| CN111355323A true CN111355323A (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010338325.6A Pending CN111355323A (en) | 2020-04-26 | 2020-04-26 | Disk type motor rotor with pole shoe composite magnetic pole structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112134381A (en) * | 2020-08-19 | 2020-12-25 | 沈阳工业大学 | Built-in magnetic steel composite pole rotor for axial flux permanent magnet motor |
| CN112152354A (en) * | 2020-08-19 | 2020-12-29 | 沈阳工业大学 | Surface insertion type permanent magnet disc type motor rotor |
| CN112564346A (en) * | 2020-12-01 | 2021-03-26 | 东南大学 | High-torque-density axial magnetic field permanent magnet motor rotor structure and motor thereof |
| CN113300515A (en) * | 2021-06-11 | 2021-08-24 | 山东大学 | Tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure and method thereof |
| CN113541427A (en) * | 2021-05-27 | 2021-10-22 | 重庆望江工业有限公司 | Double-high axial motor capable of effectively reducing back electromotive force torque pulsation |
| WO2022204992A1 (en) * | 2021-03-30 | 2022-10-06 | 华为数字能源技术有限公司 | Electric motor rotor, electric motor and electric vehicle |
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2020
- 2020-04-26 CN CN202010338325.6A patent/CN111355323A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112134381A (en) * | 2020-08-19 | 2020-12-25 | 沈阳工业大学 | Built-in magnetic steel composite pole rotor for axial flux permanent magnet motor |
| CN112152354A (en) * | 2020-08-19 | 2020-12-29 | 沈阳工业大学 | Surface insertion type permanent magnet disc type motor rotor |
| CN112152354B (en) * | 2020-08-19 | 2023-01-13 | 沈阳工业大学 | Surface insertion type permanent magnet disc type motor rotor |
| CN112564346A (en) * | 2020-12-01 | 2021-03-26 | 东南大学 | High-torque-density axial magnetic field permanent magnet motor rotor structure and motor thereof |
| CN112564346B (en) * | 2020-12-01 | 2021-10-29 | 东南大学 | High-torque-density axial magnetic field permanent magnet motor rotor structure and motor thereof |
| WO2022204992A1 (en) * | 2021-03-30 | 2022-10-06 | 华为数字能源技术有限公司 | Electric motor rotor, electric motor and electric vehicle |
| EP4300775A4 (en) * | 2021-03-30 | 2024-05-15 | Huawei Digital Power Technologies Co., Ltd. | Electric motor rotor, electric motor and electric vehicle |
| CN113541427A (en) * | 2021-05-27 | 2021-10-22 | 重庆望江工业有限公司 | Double-high axial motor capable of effectively reducing back electromotive force torque pulsation |
| CN113300515A (en) * | 2021-06-11 | 2021-08-24 | 山东大学 | Tangential magnet structure disc type axial magnetic field permanent magnet brushless motor structure and method thereof |
| CN113300515B (en) * | 2021-06-11 | 2022-11-15 | 山东大学 | Disc type axial magnetic field permanent magnet brushless motor structure containing tangential magnet structure and method thereof |
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