CN106385154A - External rotor brushless permanent magnet motor - Google Patents
External rotor brushless permanent magnet motor Download PDFInfo
- Publication number
- CN106385154A CN106385154A CN201610852892.7A CN201610852892A CN106385154A CN 106385154 A CN106385154 A CN 106385154A CN 201610852892 A CN201610852892 A CN 201610852892A CN 106385154 A CN106385154 A CN 106385154A
- Authority
- CN
- China
- Prior art keywords
- stator
- external rotor
- corner
- rotor brushless
- permanent magnet
- 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.)
- Withdrawn
Links
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
- H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- 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
Abstract
The invention relates to an external rotor brushless permanent magnet motor and belongs to the motor technical field. The objective of the invention is to solve the technical problems of motor vibration and operating noises. The motor includes a rotor and a stator arranged in the rotor. The inner wall of the rotor is provided with a plurality of permanent magnetic poles at intervals along a circumferential direction. Chamfers are formed at the left edge portion and right edge portion of the inner side of each permanent magnetic pole. A plurality of stator teeth are formed on the stator. The stator teeth are distributed at intervals along the circumferential direction of the stator. The external rotor brushless permanent magnet motor is characterized in that a left stator auxiliary groove and a right stator auxiliary groove are formed in each stator tooth; and cut tooth tips are formed at the left edge portion and right edge portion of each stator tooth. According to the external rotor brushless permanent magnet motor provided by the invention, small vibration and operating noises are generated in the operation of the external rotor brushless permanent magnet motor.
Description
Technical field
The present invention relates to motor technology, more particularly to a kind of technology of external rotor brushless magneto.
Background technology
Brushless PM synchronous motor has a small volume, efficiency high, and structure is simple, the advantages of manufacturing is strong, wherein outer rotor
Magneto is widely applied in blower fan, air conditioner.
In outer-rotor permanent magnet motor running, when the magnetic flux of rotor-side permanent magnet is coupled with stator teeth, due to tooth
Groove affects, and can produce cogging torque.And while producing effective torque, also can produce radial electromagnetic force.These reasons
Motor will be led to produce vibration and running noises in running.
As shown in figure 3, traditional outer-rotor permanent magnet motor is mainly by rotor 31 and the stator that is arranged in rotor 31 forms,
In the circumferentially spaced circumferentially-spaced cloth being laid with multiple permanent magnetism magnetic poles 32, being formed with along stator on stator of the inwall of rotor 31
If multiple stator tooths 33.Traditional outer-rotor permanent magnet motor all to be improved by the way of optimizing rotor-side permanent magnetism magnetic pole shape
Cogging torque, thus improving vibration and the situation of noise, such as implements corner cut to the permanent magnetism magnetic pole 32 of rotor 31 side.This only according to
Mode by optimizing the permanent magnetism magnetic pole shape of rotor 31 side is relatively small to the improvement of cogging torque, to the vibration of motor and
The improvement of running noises is also inconspicuous, and therefore traditional vibration of outer-rotor permanent magnet motor and running noises are all larger.
Content of the invention
For defect present in above-mentioned prior art, the technical problem to be solved be provide a kind of vibration and
The little external rotor brushless magneto of running noises.
In order to solve above-mentioned technical problem, a kind of external rotor brushless magneto provided by the present invention, including rotor, and
It is arranged on the stator in rotor, the inwall of described rotor is circumferentially spaced to be laid with multiple permanent magnetism magnetic poles, and described permanent magnetism magnetic pole exists
The left and right edges portion of inner side is formed with corner cut, and described stator is formed with multiple stator tooths, and each stator tooth is along between the circumference of stator
Every lay it is characterised in that：Each stator auxiliary tank around is offered on described stator tooth, and the left and right sides of stator tooth
Edge part is formed with cutting point.
Further, if two stator auxiliary tanks to the corner between side be A1, two stator auxiliary tanks are dorsad
Corner between edge be A2, two corner cuts in inner side left and right edges portion of permanent magnetism magnetic pole to the corner between side be B1,
Corner between the left and right sides of permanent magnetism magnetic pole is B2, the left and right cutting point of stator tooth to being C to the corner between side；Then
There is A1<B1<A2<C, and B1 is more than 0.5 times of B2.
Further, the radial section of described stator auxiliary tank is curved.
Further, the radial section of described stator auxiliary tank is rectangular.
The external rotor brushless magneto that the present invention provides, on the basis of rotor-side permanent magnetism magnetic pole corner cut, in stator tooth
On increased stator auxiliary tank and cutting point structure, thus optimizing the cooperation of stator and rotor, back-emf harmonic wave can be improved and contains
Amount, cogging torque, torque ripple, radial force, so as to be effectively improved motor oscillating and running noises.
Brief description
Fig. 1 is the structural representation of the external rotor brushless magneto of first embodiment of the invention；
Fig. 2 is the structural representation of the external rotor brushless magneto of second embodiment of the invention；
Fig. 3 is the structural representation of existing external rotor brushless magneto；
Fig. 4 is the back-emf with traditional external rotor brushless magneto for the external rotor brushless magneto of first embodiment of the invention
Harmonic contrast schemes；
Fig. 5 is that the external rotor brushless magneto of first embodiment of the invention is turned with the teeth groove of traditional external rotor brushless magneto
Square contrasts；
Fig. 6 is the torque ripple with traditional external rotor brushless magneto for the external rotor brushless magneto of first embodiment of the invention
Dynamic comparison diagram；
Fig. 7 is the radial direction electricity with traditional external rotor brushless magneto for the external rotor brushless magneto of first embodiment of the invention
Magnetic force comparison diagram.
Specific embodiment
Below in conjunction with brief description, embodiments of the invention are described in further detail, but the present embodiment is not used to limit
The present invention processed, the analog structure of every employing present invention and its similar change, all should list protection scope of the present invention, the present invention in
In pause mark all represent the relation of sum.
As shown in figure 1, a kind of external rotor brushless magneto that first embodiment of the invention is provided, including rotor 11,
And be arranged on stator in rotor 11, the inwall of described rotor 11 is circumferentially spaced to be laid with multiple permanent magnetism magnetic poles 12, described forever
Magnetic magnetic pole 12 is in inner side（It is inner side towards stator side）Left and right edges portion be formed with corner cut 121, described stator is formed with
Multiple stator tooths 13, each stator tooth 13 along stator circumferentially-spaced laying it is characterised in that：A left side is offered on described stator tooth 13
Right each stator auxiliary tank 131, and the left and right sides edge part of stator tooth 13 is formed with cutting point；
If two stator auxiliary tanks 131 to the corner between side be A1, between the dorsad edge of two stator auxiliary tanks 131
Corner be A2, two corner cuts 121 in inner side left and right edges portion of permanent magnetism magnetic pole to the corner between side be B1, permanent-magnet magnetic
Corner between the left and right sides of pole 12 is B2, the left and right cutting point of stator tooth 13 to being C to the corner between side；Then have
A1<B1<A2<C, and B1 is more than 0.5 times of B2.
In first embodiment of the invention, the radial section of described stator auxiliary tank 131 is curved.
In first embodiment of the invention, the left and right sides edge part of stator tooth 13 is formed with cutting point and refers to stator tooth 13
The thickness of left and right sides edge part is gradually reduced along towards the direction at edge, that is,：The thickness of stator tooth left edge portions from the right side to
A left side is gradually reduced, and on the right of stator tooth, the thickness of edge is gradually reduced from left to right.
Fig. 4 is the anti-of external rotor brushless magneto and traditional external rotor brushless magneto of first embodiment of the invention
Potential harmonic contrast schemes；Open tubular column line in Fig. 4 is the back-emf harmonic wave post line of first embodiment of the invention, and solid post line is to pass
The back-emf harmonic wave post line of system external rotor brushless magneto；
Fig. 5 is that the external rotor brushless magneto of first embodiment of the invention is turned with the teeth groove of traditional external rotor brushless magneto
Square contrasts；Dotted line in Fig. 5 is the cogging torque curve of first embodiment of the invention, and solid line is traditional external rotor brushless Permanent Magnet and Electric
The cogging torque curve of machine；
Fig. 6 is the torque ripple with traditional external rotor brushless magneto for the external rotor brushless magneto of first embodiment of the invention
Dynamic comparison diagram；Dotted line in Fig. 6 is the torque ripple curve of first embodiment of the invention, and solid line is traditional external rotor brushless permanent magnetism
The torque ripple curve of motor；
Fig. 7 is the radial direction electricity with traditional external rotor brushless magneto for the external rotor brushless magneto of first embodiment of the invention
Magnetic force comparison diagram；Dotted line in Fig. 7 is the radial direction force curve of first embodiment of the invention, and solid line is traditional external rotor brushless permanent magnetism
The radial direction force curve of motor；
As can be seen that first embodiment of the invention can be effectively improved back-emf harmonic content, cogging torque, torque from Fig. 4 to Fig. 7
Fluctuation, radial force, so as to be effectively improved motor oscillating and running noises.
As shown in Fig. 2 second embodiment of the invention is with the difference of first embodiment：Stator in second embodiment is auxiliary
Help the radial section of groove 231 rectangular.
Claims (4)
1. a kind of external rotor brushless magneto, including rotor, and is arranged on the stator in rotor, and the inwall of described rotor is along week
It is laid with multiple permanent magnetism magnetic poles to interval, described permanent magnetism magnetic pole is formed with corner cut in the left and right edges portion of inner side, on described stator
Be formed with multiple stator tooths, each stator tooth along stator circumferentially-spaced laying it is characterised in that：A left side is offered on described stator tooth
Right each stator auxiliary tank, and the left and right sides edge part of stator tooth is formed with cutting point.
2. external rotor brushless magneto according to claim 1 it is characterised in that：If two stator auxiliary tanks to
Corner between side is A1, and the corner between the dorsad edge of two stator auxiliary tanks is A2, the inner side left and right side of permanent magnetism magnetic pole
Two corner cuts of edge to the corner between side be B1, the corner between the left and right sides of permanent magnetism magnetic pole be B2, stator
The left and right cutting point of tooth to being C to the corner between side；Then there is A1<B1<A2<C, and B1 is more than 0.5 times of B2.
3. external rotor brushless magneto according to claim 1 it is characterised in that：The radial direction of described stator auxiliary tank is cut
Face is curved.
4. external rotor brushless magneto according to claim 1 it is characterised in that：The radial direction of described stator auxiliary tank is cut
Face is rectangular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610852892.7A CN106385154A (en) | 2016-09-26 | 2016-09-26 | External rotor brushless permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610852892.7A CN106385154A (en) | 2016-09-26 | 2016-09-26 | External rotor brushless permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106385154A true CN106385154A (en) | 2017-02-08 |
Family
ID=57935990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610852892.7A Withdrawn CN106385154A (en) | 2016-09-26 | 2016-09-26 | External rotor brushless permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106385154A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180134762A (en) * | 2017-06-09 | 2018-12-19 | 한온시스템 주식회사 | motor |
| CN112564321A (en) * | 2020-11-30 | 2021-03-26 | 安徽美芝精密制造有限公司 | Stator core, stator, permanent magnet synchronous motor, compressor and refrigeration equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194735A (en) * | 1996-05-24 | 1998-09-30 | 松下电器产业株式会社 | Motor |
| JP2005245146A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Electric Corp | Synchronous motor, enclosed compressor and fan motor |
| JP2006050853A (en) * | 2004-08-06 | 2006-02-16 | Yaskawa Electric Corp | Motor |
| CN101222153A (en) * | 2007-01-12 | 2008-07-16 | 台达电子工业股份有限公司 | Rotation structure of permanent magnet motor and method determining its rotation structure |
| KR20080081541A (en) * | 2007-03-05 | 2008-09-10 | 엘지전자 주식회사 | Blec motor |
| CN103683562A (en) * | 2012-09-17 | 2014-03-26 | 美的集团股份有限公司 | DC motor, variable-frequency compressor and full-DC variable-frequency air conditioner outdoor unit |
| JP2016063728A (en) * | 2014-09-22 | 2016-04-25 | 株式会社ミツバ | Brushless motor |
| US20160197525A1 (en) * | 2014-08-25 | 2016-07-07 | Hanon Systems | Brushless motor |
| CN206099694U (en) * | 2016-09-26 | 2017-04-12 | 上海特波电机有限公司 | Brushless permanent -magnet machine of external rotor |
-
2016
- 2016-09-26 CN CN201610852892.7A patent/CN106385154A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1194735A (en) * | 1996-05-24 | 1998-09-30 | 松下电器产业株式会社 | Motor |
| JP2005245146A (en) * | 2004-02-27 | 2005-09-08 | Mitsubishi Electric Corp | Synchronous motor, enclosed compressor and fan motor |
| JP2006050853A (en) * | 2004-08-06 | 2006-02-16 | Yaskawa Electric Corp | Motor |
| CN101222153A (en) * | 2007-01-12 | 2008-07-16 | 台达电子工业股份有限公司 | Rotation structure of permanent magnet motor and method determining its rotation structure |
| KR20080081541A (en) * | 2007-03-05 | 2008-09-10 | 엘지전자 주식회사 | Blec motor |
| CN103683562A (en) * | 2012-09-17 | 2014-03-26 | 美的集团股份有限公司 | DC motor, variable-frequency compressor and full-DC variable-frequency air conditioner outdoor unit |
| US20160197525A1 (en) * | 2014-08-25 | 2016-07-07 | Hanon Systems | Brushless motor |
| JP2016063728A (en) * | 2014-09-22 | 2016-04-25 | 株式会社ミツバ | Brushless motor |
| CN206099694U (en) * | 2016-09-26 | 2017-04-12 | 上海特波电机有限公司 | Brushless permanent -magnet machine of external rotor |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180134762A (en) * | 2017-06-09 | 2018-12-19 | 한온시스템 주식회사 | motor |
| CN110999033A (en) * | 2017-06-09 | 2020-04-10 | 翰昂汽车零部件有限公司 | Motor with a stator having a stator core |
| JP2020522976A (en) * | 2017-06-09 | 2020-07-30 | ハンオン システムズ | motor |
| CN110999033B (en) * | 2017-06-09 | 2022-01-11 | 翰昂汽车零部件有限公司 | Motor |
| US11381144B2 (en) | 2017-06-09 | 2022-07-05 | Hanon Systems | Motor |
| JP7265997B2 (en) | 2017-06-09 | 2023-04-27 | ハンオン システムズ | motor |
| KR102578760B1 (en) | 2017-06-09 | 2023-09-15 | 한온시스템 주식회사 | motor |
| CN112564321A (en) * | 2020-11-30 | 2021-03-26 | 安徽美芝精密制造有限公司 | Stator core, stator, permanent magnet synchronous motor, compressor and refrigeration equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | 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 |
Application publication date: 20170208 |
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| WW01 | Invention patent application withdrawn after publication |