CN104158318A - Method for reducing cogging torque of permanent magnet motor - Google Patents
Method for reducing cogging torque of permanent magnet motor Download PDFInfo
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- CN104158318A CN104158318A CN201410370564.4A CN201410370564A CN104158318A CN 104158318 A CN104158318 A CN 104158318A CN 201410370564 A CN201410370564 A CN 201410370564A CN 104158318 A CN104158318 A CN 104158318A
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- permanent magnet
- cogging torque
- magnet motor
- motor
- magneto
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Abstract
The invention discloses a method for reducing cogging torque of a permanent magnet motor. The method comprises the steps that the permanent magnet motor is partially and uniformly divided into segments, so as to be mounted at a certain rotation angle. The novel method for reducing the cogging torque of the permanent magnet motor can not only reduce the cogging torque, but also improve the electromagnetic torque of the permanent magnet motor.
Description
Technical field
The present invention relates to motor cogging torque applied technical field, specifically a kind of method that reduces cogging torque of permanent magnet motor.
Background technology
At present, the cogging torque that weakens magneto is mainly considered from changing three aspects of combination of armature parameter, permanent magnetism magnetic pole parameter and groove number and number of poles; Changing armature parameter mainly comprises and changes the shape of tooth, slot opening, the skewed slot and open the methods such as auxiliary tank such as not; Changing permanent magnetism magnetic pole parameter mainly comprises and changes pole embrace, magnetic pole skew, pole embrace combination and the method such as uniform thickness permanent magnet not such as not.Can reduce cogging torque by changing the mode of the oblique utmost point of permanent magnet in addition, but the simple comparatively difficulty that changes in oblique utmost point technique often, and when rotor be pole embrace when being 1 permanent magnet the mode of the oblique utmost point be difficult to accomplish.
summary of the inventionthe object of this invention is to provide a kind of method that reduces cogging torque of permanent magnet motor, to solve prior art, by changing permanent magnet, tiltedly extremely reduce the comparatively problem of difficulty of cogging torque.
In order to achieve the above object, the technical solution adopted in the present invention is:
A method that reduces cogging torque of permanent magnet motor, is characterized in that: will have the magneto of rotor core or without the even segmentation of permanent magnet of the magneto of rotor core, and install according to certain anglec of rotation.
A kind of described method that reduces cogging torque of permanent magnet motor, it is characterized in that: in magneto, pole embrace is 1 rotor permanent magnet, or the rotor permanent magnet of pole embrace non-1, can adopt permanent magnet segmentation, and the method for installing according to certain anglec of rotation reduces cogging torque of permanent magnet motor.
A kind of described method that reduces cogging torque of permanent magnet motor, is characterized in that: in magneto, outer rotor permanent magnet also can adopt permanent magnet segmentation, and the method for installing according to certain anglec of rotation reduces cogging torque of permanent magnet motor.
Compared with prior art, the invention has the beneficial effects as follows: this reduces the method for cogging torque of permanent magnet motor, can not only reduce cogging torque, and can improve the electromagnetic torque of magneto.
Accompanying drawing explanation
Fig. 1 is the outer-rotor structure figure of brshless DC motor.
Fig. 2 is brshless DC motor external rotor permanent magnet part (not segmentation).
Fig. 3 is brshless DC motor external rotor permanent magnet part (dividing two periods).
Fig. 4 is brshless DC motor external rotor permanent magnet part (dividing three periods).
Fig. 5 is brshless DC motor external rotor permanent magnet part (dividing four periods).
Fig. 6 is brshless DC motor internal rotor permanent-magnetic part (not segmentation).
Fig. 7 is brshless DC motor internal rotor permanent-magnetic part (dividing two periods).
Fig. 8 is brshless DC motor internal rotor permanent-magnetic part (dividing three periods).
Fig. 9 is brshless DC motor internal rotor permanent-magnetic part (dividing four periods).
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only part embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making all other embodiment that obtain under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Fig. 1-Fig. 9.Reduce a method for cogging torque of permanent magnet motor, will have the magneto of rotor core or without the even segmentation of permanent magnet of the magneto of rotor core, and install according to certain anglec of rotation.
In magneto, pole embrace is 1 rotor permanent magnet, or the rotor permanent magnet of pole embrace non-1, can adopt permanent magnet segmentation, and the method for installing according to certain anglec of rotation reduces cogging torque of permanent magnet motor.
In magneto, outer rotor permanent magnet also can adopt permanent magnet segmentation, and the method for installing according to certain anglec of rotation reduces cogging torque of permanent magnet motor.
The present invention realizes principle: in the situation that production technology can reach, permanent magnet machine rotor permanent magnetism is partly divided into as much as possible section, as permanent magnets being divided into 4 sections, every is the four same utmost points, comprise that the parameters such as magnetic energy density and remanent magnetism all guarantee identical, will between every section of permanent magnets, according to the 5 degree anglecs of rotation, be superimposed when mounted.Due to the groove number of each motor, the parameters such as number of poles are different, and therefore the anglec of rotation of stack is also different, and this angle can by finite element analysis software out, also can be done experiment and draw.
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.
The above; it is only preferred embodiment of the present invention; not in order to limit the present invention, any trickle modification that every foundation technical spirit of the present invention is done above embodiment, be equal to and replace and improve, within all should being included in the protection range of technical solution of the present invention.
Claims (3)
1. a method that reduces cogging torque of permanent magnet motor, is characterized in that: will have the magneto of rotor core or without the even segmentation of permanent magnet of the magneto of rotor core, and install according to certain anglec of rotation.
2. a kind of method that reduces cogging torque of permanent magnet motor according to claim 1, it is characterized in that: in magneto, pole embrace is 1 rotor permanent magnet, or the rotor permanent magnet of pole embrace non-1, can adopt permanent magnet segmentation, and the method for installing according to certain anglec of rotation reduces cogging torque of permanent magnet motor.
3. a kind of method that reduces cogging torque of permanent magnet motor according to claim 1, it is characterized in that: in magneto, outer rotor permanent magnet also can adopt permanent magnet segmentation, and the method for installing according to certain anglec of rotation reduces cogging torque of permanent magnet motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410370564.4A CN104158318A (en) | 2014-07-30 | 2014-07-30 | Method for reducing cogging torque of permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410370564.4A CN104158318A (en) | 2014-07-30 | 2014-07-30 | Method for reducing cogging torque of permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104158318A true CN104158318A (en) | 2014-11-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410370564.4A Pending CN104158318A (en) | 2014-07-30 | 2014-07-30 | Method for reducing cogging torque of permanent magnet motor |
Country Status (1)
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| CN (1) | CN104158318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245043A (en) * | 2015-10-13 | 2016-01-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Segmentation skewed-pole type permanent magnet synchronous motor rotor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08340652A (en) * | 1995-06-14 | 1996-12-24 | Matsushita Electric Ind Co Ltd | Ac servo motor |
| JP2004140911A (en) * | 2002-10-17 | 2004-05-13 | Yaskawa Electric Corp | Ac motor |
| JP2009284716A (en) * | 2008-05-26 | 2009-12-03 | Mitsuba Corp | Outer rotor type brushless motor |
| CN202586688U (en) * | 2012-01-01 | 2012-12-05 | 东菱技术股份有限公司 | A permanent magnetic synchronous servo motor with segmental rotor skewed poles |
| CN203301256U (en) * | 2013-04-12 | 2013-11-20 | 杭州中科赛思伺服电机有限公司 | Segmented rotor skew pole structure |
-
2014
- 2014-07-30 CN CN201410370564.4A patent/CN104158318A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08340652A (en) * | 1995-06-14 | 1996-12-24 | Matsushita Electric Ind Co Ltd | Ac servo motor |
| JP2004140911A (en) * | 2002-10-17 | 2004-05-13 | Yaskawa Electric Corp | Ac motor |
| JP2009284716A (en) * | 2008-05-26 | 2009-12-03 | Mitsuba Corp | Outer rotor type brushless motor |
| CN202586688U (en) * | 2012-01-01 | 2012-12-05 | 东菱技术股份有限公司 | A permanent magnetic synchronous servo motor with segmental rotor skewed poles |
| CN203301256U (en) * | 2013-04-12 | 2013-11-20 | 杭州中科赛思伺服电机有限公司 | Segmented rotor skew pole structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105245043A (en) * | 2015-10-13 | 2016-01-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Segmentation skewed-pole type permanent magnet synchronous motor rotor |
| CN105245043B (en) * | 2015-10-13 | 2019-01-22 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of step skewed pole formula permanent-magnetic synchronous motor rotor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141119 |