CN107634630A - A kind of stator core for reducing torque ripple of permanent-magnet motor - Google Patents
A kind of stator core for reducing torque ripple of permanent-magnet motor Download PDFInfo
- Publication number
- CN107634630A CN107634630A CN201711127492.0A CN201711127492A CN107634630A CN 107634630 A CN107634630 A CN 107634630A CN 201711127492 A CN201711127492 A CN 201711127492A CN 107634630 A CN107634630 A CN 107634630A
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- China
- Prior art keywords
- stator
- stator core
- silicon steel
- steel sheet
- root
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Permanent Magnet Type Synchronous Machine (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A kind of stator core for reducing torque ripple of permanent-magnet motor is invented, if it is by stator slot（2）And stator tooth（3）Silicon steel sheet punching（1）It is stacked；The Excircle machining of described stator core has torsion chute（5）, in every silicon steel sheet punching（1）Stator tooth（3）Root is provided with two symmetrical small teeth（4）, make in stator core each stator tooth root formed with two sulculuses.The stator core of the present invention, is to use torsion chute by stator core, weakens the different subharmonic of magneto；Two symmetrical small teeth are provided with using the root of the stator tooth of every silicon steel sheet punching, make in stator core each stator tooth root formed with two sulculuses, so that Air-gap Flux Density in Permanent Magnet Machines waveform reaches the purpose for weakening cogging torque, reduces permagnetic synchronous motor torque pulsation close to sine wave.With simple in construction, the advantages of technical maturity, especially suitable for Over Electric Motor with PMSM.
Description
Technical field
The present invention relates to a kind of stator core, particularly a kind of stator core for reducing torque ripple of permanent-magnet motor.
Background technology
Magneto is with its efficiency high, small volume, the characteristics of excellent performance, in high control precision and the occasion of high reliability
It is used widely.These application requirements motors have stable electromagnetic torque.The electromagnetic torque of magneto be by stator around
Air-gap flux caused by electric current and rotor permanent magnet in group interacts, the synthetically produced electromagnetic torque of three-phase.Ideally,
Stator current, back emf waveform are sine wave, and electromagnetic torque is constant, will not produce torque pulsation.And it is actual in motor,
For magneto by permanent magnet excitation, Gas-gap Magnetic Field Resonance Wave is more, makes the harmonic wave of counter electromotive force more.Further, since frequency converter supplies
The non-sine of electricity, inevitably contain higher hamonic wave, different times harmonic electromotive force and electric current phase interactions in stator current
With generation Cymbidium aloifolium.Simultaneously as cogging torque is phenomenon specific to magneto, the slot effect of magneto can produce
Raw cogging torque, i.e. magnetic field caused by permanent magnet interact with stator teeth groove and produce torque, cause periodic torque pulsation.
The content of the invention
The purpose of the present invention is that invention is a kind of simple in construction, can weaken the different subharmonic of magneto, it is same to reduce permanent magnetism
Walk the stator core of motor torque ripple.
A kind of stator core of reduction torque ripple of permanent-magnet motor of the present invention, it is to carry stator slot and stator by some
The silicon steel sheet punching of tooth is stacked；It is characterized in that the Excircle machining of described stator core has torsion chute, in every silicon steel
The stator root portion of piece punching is provided with two symmetrical small teeth, makes each stator tooth root of stator core inner circle small formed with two
Groove.
The stator core of the present invention, is to use torsion chute by stator core, weakens the different subharmonic of magneto；Adopt
Two symmetrical small teeth are provided with the root of the stator tooth of every silicon steel sheet punching, form each stator tooth root in stator core
There are two sulculuses, so that Air-gap Flux Density in Permanent Magnet Machines waveform reaches the purpose for weakening cogging torque, reduced forever close to sine wave
Magnetic-synchro motor torque ripple.With simple in construction, the advantages of technical maturity, especially suitable for permanent magnet synchronous electric used for electric vehicle
Machine.
Brief description of the drawings
Accompanying drawing 1 is the silicon steel sheet lamination structure schematic diagram of the stator core of the present invention；Accompanying drawing 2 is the stator core of the present invention
Outside schematic diagram.
1 is silicon steel sheet punching in figure, and 2 be the stator slot of silicon steel sheet punching, and 3 be the stator tooth of silicon steel sheet punching, and 4 be to be opened in
The small tooth of stator root portion, 5 be torsion chute.
Embodiment
Referring to accompanying drawing, the stator core of a kind of reduction torque ripple of permanent-magnet motor of the invention, if it in silicon steel sheet by rushing
Piece 1 is stacked；Silicon steel sheet punching 1 is first processed into the silicon steel sheet punching 1 of stator slot 2 and stator tooth 3 by figure requirement, and
Each root of stator tooth 3 opens up two symmetrical small teeth 4, is then stacked the silicon steel sheet punching 1 processed by figure requirement
Stator core, make in stator core each stator tooth root formed with two sulculuses, stator core is cylindrical plus torsion chute 5, surface
It is welded into the stator of magneto.The present invention uses torsion chute by stator core, weakens the different subharmonic of magneto；Adopt
Two symmetrical small teeth are provided with the root of the stator tooth of every silicon steel sheet punching, form each stator tooth root in stator core
There are two sulculuses, so that Air-gap Flux Density in Permanent Magnet Machines waveform reaches the purpose for weakening cogging torque, reduced forever close to sine wave
Magnetic-synchro motor torque ripple.
Claims (1)
1. a kind of stator core for reducing torque ripple of permanent-magnet motor, it carries stator slot by some（2）And stator tooth（3）Silicon steel
Piece punching（1）It is stacked；It is characterized in that the Excircle machining of described stator core has torsion chute（5）, in every silicon steel sheet
Punching（1）Stator tooth（3）Root is provided with two symmetrical small teeth（4）, make in stator core each stator tooth root formed with two
Individual sulculus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127492.0A CN107634630A (en) | 2017-11-15 | 2017-11-15 | A kind of stator core for reducing torque ripple of permanent-magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711127492.0A CN107634630A (en) | 2017-11-15 | 2017-11-15 | A kind of stator core for reducing torque ripple of permanent-magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107634630A true CN107634630A (en) | 2018-01-26 |
Family
ID=61107676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711127492.0A Withdrawn CN107634630A (en) | 2017-11-15 | 2017-11-15 | A kind of stator core for reducing torque ripple of permanent-magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107634630A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111200321A (en) * | 2018-11-19 | 2020-05-26 | 东芝三菱电机产业系统株式会社 | Rotating electric machine, stator, and method for assembling stator |
| CN112448496A (en) * | 2020-12-03 | 2021-03-05 | 江苏苏美达五金工具有限公司 | Stator punching sheet and low-cogging-torque permanent magnet brushless motor with same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106291A (en) * | 2007-07-25 | 2008-01-16 | 上海洛克磁业有限公司 | A structure for generator stator punching sheet |
| CN202260673U (en) * | 2011-08-25 | 2012-05-30 | 江苏上骐集团有限公司 | Stator punching sheet used for AC permanent-magnet servomotor |
-
2017
- 2017-11-15 CN CN201711127492.0A patent/CN107634630A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106291A (en) * | 2007-07-25 | 2008-01-16 | 上海洛克磁业有限公司 | A structure for generator stator punching sheet |
| CN202260673U (en) * | 2011-08-25 | 2012-05-30 | 江苏上骐集团有限公司 | Stator punching sheet used for AC permanent-magnet servomotor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111200321A (en) * | 2018-11-19 | 2020-05-26 | 东芝三菱电机产业系统株式会社 | Rotating electric machine, stator, and method for assembling stator |
| CN112448496A (en) * | 2020-12-03 | 2021-03-05 | 江苏苏美达五金工具有限公司 | Stator punching sheet and low-cogging-torque permanent magnet brushless motor with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180126 |