CN106712425A - Permanent magnet synchronous motor for compressor - Google Patents
Permanent magnet synchronous motor for compressor Download PDFInfo
- Publication number
- CN106712425A CN106712425A CN201710138764.0A CN201710138764A CN106712425A CN 106712425 A CN106712425 A CN 106712425A CN 201710138764 A CN201710138764 A CN 201710138764A CN 106712425 A CN106712425 A CN 106712425A
- Authority
- CN
- China
- Prior art keywords
- rotor
- holding tank
- magnet
- gap
- magnet holding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 230000004907 flux Effects 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 4
- 210000000515 tooth Anatomy 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
- H02K21/145—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having an annular armature coil
-
- 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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
- H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect
- H02K1/2773—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect consisting of tangentially magnetized radial magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/028—Means for mechanical adjustment of the excitation flux by modifying the magnetic circuit within the field or the armature, e.g. by using shunts, by adjusting the magnets position, by vectorial combination of field or armature sections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention discloses a permanent magnet synchronous motor, comprising a stator and a rotor which are formed by laminating electromagnetic steel plates, wherein the rotor is arranged inside the stator, a plurality of magnet accommodating slots extending in the length direction of the rotor and distributed circumferentially in a V-shaped structure are formed in the end face of the rotor, permanent magnets having the same magnetic poles are arranged in the magnet accommodating slots, and meanwhile, permanent magnets having opposite magnetic poles are arranged in any two adjacent magnet accommodating slots; an arc groove extending in the length direction of the rotor is formed in the outer circumferential surface of the rotor between any two adjacent magnet accommodating slots; at least one first gap hole group and one second gap hole group extending in the length direction of the rotor are formed in a gap part between the outer side of each magnet accommodating slot and the outer circumference of the rotor; thus, the magnetic flux density distribution of the air gap part between the stator and the rotor is smoothed circumferentially, and then noise and vibration of the permanent magnet synchronous motor are reduced.
Description
Technical field
The present invention relates to the technical field of synchronous motor, a kind of Permanent magnet synchronous for compressor are referred in particular to electronic
Machine.
Background technology
At present, it is 3n in motor stator（n=1,2,3...）Groove, rotor is 2n（n1,2,3...）The synchronous permanent-magnet motor of pole
In machine, its stator winding realizes the efficient of motor using the Nd-Fe-B permanent magnet of terres rares using concentration winding and excitation
Change.And use the terres rares NdFeB material of remanent magnetism high, in the compressor for carrying air-conditioning, refrigerator etc., exist it is ear-piercing in it is low
The increased problem of frequency range noise.Secondly as the high speed development of modern power electronics technology, the used controller of motor driving
The electric current of output can realize sinusoidal waveform, and only be fundametal compoment as play useful effect with torque, thus it requires motor
The voltage sensed in stator winding is tried one's best sineization, its high fdrequency component influence torque ripple so that noise and vibrate increasing, by
The voltage sensed in stator winding forms the distortion components containing many higher hamonic waves, causes iron loss to increase and reduce motor
Efficiency.
It is well known that the interphase interaction of permanent magnet and iron core is produced when cogging torque is magneto winding no power
Torque, is that the tangential component of Interaction Force by permanent magnet Yu armature tooth causes.When there is relative motion in rotor,
Magnetic conductance between armature tooth and permanent magnet in permanent magnet pole arc portion point is basically unchanged, therefore the magnetic field around these armature tooths
It is basically unchanged, and in a bit of region being made up of one or two armature tooth corresponding with the two sides of permanent magnet, magnetic conductance
Change is big, causes the change of magnetic field energy, so as to produce cogging torque.Cogging torque can then cause the battle array and noise of torque.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided one kind be applied to the compressor such as air-conditioning, refrigerator and
With the magnetic flux distribution for improving rotor core outer circumference, the noise for improving low-frequency range in compressor, carry efficient permanent magnetism
Formula synchronous motor.
In order to realize above-mentioned purpose, a kind of permanent-magnet synchronous electric motor provided by the present invention is included by electromagnetic steel
Stator and rotor that plate is made up of overlapped way, wherein, the rotor is arranged at stator interior, is provided with the rotor end-face
It is multiple to extend along rotor length direction and the circumferentially distributed magnet holding tank in " V " type structure, wherein, the magnet holding tank
Both sides angles is towards towards rotor diameter；Magnetic pole identical permanent magnet is provided with each described magnet holding tank, meanwhile, arbitrarily
The opposite permanent magnet of magnetic pole is provided with two adjacent magnet holding tanks；The adjacent magnet holding tank of any two
Between rotor outer circle side face on be provided with along rotor length direction extend arc groove；Each described magnet holding tank outside with
Be provided with the gap portion that is formed between rotor outer circle week at least one set of first gap hole group for extending along rotor length direction and
One group of second gap hole group, the first gap hole group includes two and is distributed in seam as symmetry axis is symmetrical with magnet holding tank center line
The first gap hole in the middle part of gap portion, wherein, two first gaps hole is respectively along perpendicular to the edge direction phase of magnet holding tank two
Extend；Every group of second gap hole group includes two and is distributed in gap portion two ends as symmetry axis is symmetrical with magnet holding tank center line
The second gap hole, wherein, two the second gap holes mutually extend along parallel rotor circumferencial direction.
Further, the radius of the arc groove is 2 ~ 5 times of electromagnetic steel plate thickness.
Further, the angle α on the magnet holding tank both sides is 90 ° ~ 170 °.
Further, the width in first gap hole and the second gap hole is 1 ~ 5 times of electromagnetic steel plate thickness.
The present invention uses above-mentioned scheme, and its advantage is:By being provided with the first gap group and the second gap group,
And arc groove is provided with, so as to reduce motor cogging torque, make the magnetic flux density point in the air cleft portion between stator and rotor
Cloth is smoothed in the circumferential, and then reduces the noise of permasyn morot, vibration, is especially mounted in air-conditioning, refrigerator etc.
During compressor, improve the noise of low-frequency range in compressor, improve the efficiency of permasyn morot and compressor.
Brief description of the drawings
Fig. 1 is the end face structure schematic diagram of the permanent-magnet synchronous electric motor of embodiments of the invention one.
Fig. 2 is rotor partial enlarged drawing A in Fig. 1 of embodiment one.
Fig. 3 is comparison diagram of the induction voltage waveform with electrical angle.
Fig. 4 is cogging torque amplitude comparison diagram.
Fig. 5 is the rotor local enlarged drawing of embodiment two.
Wherein, 1- stators, 2- rotors, 21- magnet holding tanks, 22- arc grooves, 23- gaps portion, the first gaps of 231- hole
Group, the second gaps of 232- hole group.
Specific embodiment
With reference to specific embodiment, the present invention is further illustrated.
Embodiment one：
Referring to shown in accompanying drawing 1 and accompanying drawing 2, in the present embodiment, a kind of permanent-magnet synchronous electric motor for compressor is included
The stator 1 and rotor 2 being made up of electromagnetic steel plate stacking, wherein, the specification according to permasyn morot matches different-thickness
Electromagnetic steel plate, the electromagnetic steel plate thickness for being commonly used in motor is 0.3 ~ 0.5mm.Rotor 2 is arranged at the inside of stator 1 and stator 1
There is air cleft portion between rotor 2；Be provided with the end face of rotor 2 it is multiple circumferentially distributed and along the length direction of rotor 2 extend in " V " type
The magnet holding tank 21 of structure, wherein, the both sides angle of magnet holding tank 21 is towards the external diameter of rotor 2；The both sides of magnet holding tank 21
Angle α is 90 ° ~ 170 °.Magnetic pole identical permanent magnet is provided with each magnet holding tank 21, meanwhile, any two is adjacent
The opposite permanent magnet of magnetic pole is provided with magnet holding tank 21.Outside rotor 2 between the adjacent magnet holding tank 21 of any two
The arc groove 22 extended along the length direction of rotor 2 is provided with periphery；The radius of arc groove 22 is the thickness of electromagnetic steel plate
2 ~ 5 times of degree.It is provided with along rotor 2 in the gap portion 23 being formed between each outside of magnet holding tank 21 and the excircle of rotor 2
One group of first gap hole group 231 and one group of second gap hole group 232 that length direction extends；First gap hole group 231 is included
Two with the center line of magnet holding tank 21 be symmetrical the first gap hole for being distributed in the middle part of gap portion 23 of symmetry axis, wherein, two
Edge mutually extends perpendicular to 21 liang of edge directions of magnet holding tank respectively in the first gap hole；Second gap hole group 232 include two with
The center line of magnet holding tank 21 is symmetrical the second gap hole for being distributed in the two ends of gap portion 23 of symmetry axis, wherein, each second seam
Lyriform pore mutually extends along the circumferencial direction of parallel rotor 2.The width in the first gap hole and the second gap hole is the 1 of electromagnetic steel plate thickness
~ 5 times.By being provided with the first gap hole group 231 and the second gap hole group 232 on rotor 2, and in adjacent different magnetic poles
Between arc groove is set, so as to reduce motor cogging torque, the magnetic flux distribution in air cleft portion is smoothed in the circumferential, from
And lower permasyn morot noise, vibration.Particularly when the compressor of air-conditioning, refrigerator etc. is carried, in improvement compressor
The noise of low-frequency range.
Referring to shown in accompanying drawing 3, figure * is the permanent magnetism of the permanent-magnet synchronous electric motor with the present embodiment one of existing conventional structure
The induction voltage waveform of formula synchronous motor with electrical angle comparison diagram, it can be seen from comparison diagram, the magneto of the present embodiment one
The obvious sineization of the induction voltage waveform of synchronous motor, so as to eliminate the distortion components of higher hamonic wave, and then reduces iron
Damage to improve the efficiency of motor.
Referring to shown in accompanying drawing 4, figure * is that the permasyn morot of existing conventional structure is same with the magneto of the present embodiment one
The cogging torque amplitude comparison diagram of motor is walked, it can be seen from comparison diagram, the magneto that the present embodiment one compares traditional structure is same
The cogging torque amplitude for walking motor is significantly reduced, and up to 30%, so as to lower the noise of permasyn morot, vibration.
Embodiment two
It is to be provided with two group of first gap hole group with the difference of embodiment one in the present embodiment referring to shown in accompanying drawing 5
231, wherein, two group of first gap hole group 231 include two with the center line of magnet holding tank 21 be the symmetrical distribution of symmetry axis
In first gap hole of the middle part of gap portion 23；Adopt and multigroup first gap hole group 231 is set in gap portion 23 in this way, so that
The magnetic flux distribution in the air cleft portion between stator 1 and rotor 2 is more smoothed in the circumferential, and then lower synchronous permanent-magnet motor
The noise of machine, vibration.
The embodiment of the above is only presently preferred embodiments of the present invention, and any formal limit is not done to the present invention
System.Any those of ordinary skill in the art, in the case where technical solution of the present invention ambit is not departed from, using the skill of the disclosure above
Art content makes more possible variations and retouching to technical solution of the present invention, or modification is Equivalent embodiments of the invention.
Therefore all contents without departing from technical solution of the present invention, according to the equivalent equivalence changes that the thinking of the present invention is made, all should be covered by
In protection scope of the present invention.
Claims (4)
1. a kind of permanent-magnet synchronous electric motor for compressor, includes the stator being made up of overlapped way electromagnetic steel plate
（1）And rotor（2）, wherein, the rotor（2）It is arranged at stator（1）Inside, the rotor（2）Multiple edges are provided with end face to turn
Son（2）Length direction extends and the circumferentially distributed magnet holding tank in " V " type structure（21）, wherein, the magnet holding tank
（21）Both sides angle is towards rotor（2）External diameter；Each described magnet holding tank（21）Magnetic pole identical permanent magnet is inside provided with, together
When, the adjacent magnet holding tank of any two（21）Inside it is provided with the opposite permanent magnet of magnetic pole；The adjacent institute of any two
State magnet holding tank（21）Between rotor（2）It is provided with along rotor on outer circumference surface（2）The arc groove that length direction extends
（22）；Each described magnet holding tank（21）Outside and rotor（2）The gap portion being formed between excircle（23）On be provided with edge
Rotor（2）At least one set of first gap hole group that length direction extends（231）With one group of second gap hole group（232）, described
One gap hole group（231）Two are included with magnet holding tank（21）Center line is distributed in gap portion for symmetry axis is symmetrical（23）In
The first gap hole in portion, wherein, two first gaps hole is respectively along perpendicular to magnet holding tank（21）Two edge directions mutually prolong
Stretch；Every group of second gap hole group（232）Two are included with magnet holding tank（21）Center line is distributed in seam for symmetry axis is symmetrical
Gap portion（23）The second gap hole at two ends, wherein, two the second gap holes are along parallel rotor（2）Circumferencial direction mutually extends.
2. a kind of permanent-magnet synchronous electric motor for compressor according to claim 1, it is characterised in that：The arc
Groove（22）Radius be 2 ~ 5 times of electromagnetic steel plate thickness.
3. a kind of permanent-magnet synchronous electric motor for compressor according to claim 1, it is characterised in that：The magnet
Holding tank（21）The angle α on both sides is 90 ° ~ 170 °.
4. a kind of permanent-magnet synchronous electric motor for compressor according to claim 1, it is characterised in that：Described first
The width in gap hole and the second gap hole is 1 ~ 5 times of electromagnetic steel plate thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138764.0A CN106712425A (en) | 2017-03-09 | 2017-03-09 | Permanent magnet synchronous motor for compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138764.0A CN106712425A (en) | 2017-03-09 | 2017-03-09 | Permanent magnet synchronous motor for compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712425A true CN106712425A (en) | 2017-05-24 |
Family
ID=58918269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710138764.0A Pending CN106712425A (en) | 2017-03-09 | 2017-03-09 | Permanent magnet synchronous motor for compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712425A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107222047A (en) * | 2017-08-09 | 2017-09-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor, tangential rotor and its rotor core |
| CN107222045A (en) * | 2017-08-09 | 2017-09-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor, tangential rotor and its rotor core |
| CN107294244A (en) * | 2017-07-27 | 2017-10-24 | 广东美芝制冷设备有限公司 | Rotor, magneto and compressor |
| CN107733112A (en) * | 2017-09-18 | 2018-02-23 | 南京理工大学 | A kind of ultrahigh speed permanent-magnetic synchronous motor rotor structure |
| CN109560631A (en) * | 2017-09-27 | 2019-04-02 | 富士电机株式会社 | The permanent magnet type rotating electric machine of variable magnetic flow-through |
| CN109586441A (en) * | 2018-11-27 | 2019-04-05 | 东南大学 | A kind of acting type motor rotor constructions such as air-gap field |
| CN110959244A (en) * | 2017-08-01 | 2020-04-03 | 株式会社电装 | Magnetic generator for motor, soft magnetic iron core and method for manufacturing magnet |
| CN110994834A (en) * | 2019-11-28 | 2020-04-10 | 江苏大学 | Alternating-direct axis inductance variable permanent magnet brushless motor and wide-area efficient optimization design method thereof |
| CN111108664A (en) * | 2017-09-29 | 2020-05-05 | 日立汽车系统株式会社 | Rotor core, rotor, rotating electrical machine, and electric auxiliary machine system for automobile |
| CN111555482A (en) * | 2020-05-29 | 2020-08-18 | 重庆长安新能源汽车科技有限公司 | Permanent magnet type rotating motor |
| US11349420B2 (en) | 2017-08-01 | 2022-05-31 | Denso Corporation | Rotary electric machine, rotary electric machine drive system, magnet, method of manufacturing magnet, magnetizing apparatus, and magnet unit |
| US11929652B2 (en) | 2019-09-10 | 2024-03-12 | Denso Corporation | Apparatus and method for manufacturing rotating electric machine |
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| CN204145239U (en) * | 2014-09-17 | 2015-02-04 | 安徽美芝精密制造有限公司 | Permagnetic synchronous motor and rotor assembly thereof |
| CN106374655A (en) * | 2016-10-24 | 2017-02-01 | 珠海凌达压缩机有限公司 | Motor rotor and permanent-magnet motor with same |
| CN206620033U (en) * | 2017-03-09 | 2017-11-07 | 广东志高精密机械有限公司 | A kind of permanent-magnet synchronous electric motor for compressor |
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| CN101247055A (en) * | 2008-02-23 | 2008-08-20 | 广东美芝制冷设备有限公司 | Low-fluctuation rare earth permanent magnetic brushless motor |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294244A (en) * | 2017-07-27 | 2017-10-24 | 广东美芝制冷设备有限公司 | Rotor, magneto and compressor |
| US11349420B2 (en) | 2017-08-01 | 2022-05-31 | Denso Corporation | Rotary electric machine, rotary electric machine drive system, magnet, method of manufacturing magnet, magnetizing apparatus, and magnet unit |
| US11936312B2 (en) | 2017-08-01 | 2024-03-19 | Denso Corporation | Magnetic generator for motor, soft magnetic core, and method of manufacturing magnet |
| CN110959244A (en) * | 2017-08-01 | 2020-04-03 | 株式会社电装 | Magnetic generator for motor, soft magnetic iron core and method for manufacturing magnet |
| CN107222045A (en) * | 2017-08-09 | 2017-09-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor, tangential rotor and its rotor core |
| CN107222047A (en) * | 2017-08-09 | 2017-09-29 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor, tangential rotor and its rotor core |
| CN107222045B (en) * | 2017-08-09 | 2023-06-20 | 珠海格力节能环保制冷技术研究中心有限公司 | Tangential motor, tangential motor rotor and rotor core thereof |
| CN107733112A (en) * | 2017-09-18 | 2018-02-23 | 南京理工大学 | A kind of ultrahigh speed permanent-magnetic synchronous motor rotor structure |
| CN109560631A (en) * | 2017-09-27 | 2019-04-02 | 富士电机株式会社 | The permanent magnet type rotating electric machine of variable magnetic flow-through |
| CN111108664A (en) * | 2017-09-29 | 2020-05-05 | 日立汽车系统株式会社 | Rotor core, rotor, rotating electrical machine, and electric auxiliary machine system for automobile |
| CN109586441A (en) * | 2018-11-27 | 2019-04-05 | 东南大学 | A kind of acting type motor rotor constructions such as air-gap field |
| US11929652B2 (en) | 2019-09-10 | 2024-03-12 | Denso Corporation | Apparatus and method for manufacturing rotating electric machine |
| CN110994834B (en) * | 2019-11-28 | 2021-12-21 | 江苏大学 | Alternating-direct axis inductance variable permanent magnet brushless motor and wide-area efficient optimization design method thereof |
| CN110994834A (en) * | 2019-11-28 | 2020-04-10 | 江苏大学 | Alternating-direct axis inductance variable permanent magnet brushless motor and wide-area efficient optimization design method thereof |
| CN111555482A (en) * | 2020-05-29 | 2020-08-18 | 重庆长安新能源汽车科技有限公司 | Permanent magnet type rotating motor |
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