CN202524197U - Segmental skewed pole shoe type permanent magnet motor rotor - Google Patents

Segmental skewed pole shoe type permanent magnet motor rotor Download PDF

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Publication number
CN202524197U
CN202524197U CN2012201127241U CN201220112724U CN202524197U CN 202524197 U CN202524197 U CN 202524197U CN 2012201127241 U CN2012201127241 U CN 2012201127241U CN 201220112724 U CN201220112724 U CN 201220112724U CN 202524197 U CN202524197 U CN 202524197U
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CN
China
Prior art keywords
rotor
permanent magnet
pole
rotary shaft
segmental
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Withdrawn - After Issue
Application number
CN2012201127241U
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Chinese (zh)
Inventor
张建承
黄晓艳
方攸同
马子魁
马吉恩
卢琴芬
董凡
印欣
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Zhejiang University ZJU
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Zhejiang University ZJU
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Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN2012201127241U priority Critical patent/CN202524197U/en
Application granted granted Critical
Publication of CN202524197U publication Critical patent/CN202524197U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model discloses a segmental skewed pole shoe type permanent magnet motor rotor. A rotor iron core is fixed on a rotary shaft via rotary shaft keys. Permanent magnets are fixed on the outside of the rotor iron core. Rotor pole shoes which can reasonably distribute the magnetic field are arranged on the outsides of the permanent magnets. The rotor pole shoes are divided into multiple segments along the axial direction, and the multiple segments are staggeredly superposed around the rotary shaft along the axial direction with a certain angle [theta]. The rotary shaft is provided with the rotary shaft keys. The rotor iron core is provided with key grooves which cooperate with the rotary shaft keys. The permanent magnets and the iron core are axially continuous, i.e. the dislocation does not occur circumferentially. The rotation staggered angle [theta] between adjacent segmental rotor pole shoes is equal to 360 degrees/[N*LCM(Z1, 2p)], wherein the N represents the rotor pole shoe segment number, Z1 represents the stator groove number, the p represents the motor pole pair number, the LCM(Z1, 2p) represents the minimum common multiple of the Z1 and 2p. Through the axial segmental adjustment of the rotor pole shoes, the target of rotor skewed pole is realized, and the manufacturing technology is simplified. At the same time, the problem of axial flux leakage among segments existing in a conventional rotor segmental skewed pole rotation permanent magnet is avoided.

Description

Segmentation skewed pole-shoe formula permanent magnet machine rotor
Technical field
The utility model relates to the rotor of magneto, relates in particular to a kind of segmentation skewed pole-shoe formula permanent magnet machine rotor.
Background technology
Magneto is compared with traditional excitation electromotor has simple in structure, distinguishing features such as loss is little, power factor is high, efficient is high, power density is high, starting torque is big, temperature rise is low, lightweight.Improving constantly and improving and the progressively reduction of price along with rare earth permanent-magnetic material (particularly Nd-Fe-Bo permanent magnet material) magnetic property; The magneto research and development are progressively ripe, make magneto obtain application more and more widely at aspects such as national defence, industrial and agricultural production and daily lifes.
Magneto is to rely on to be installed in the motor that epitrochanterian permanent magnet produces magnetic field; Its stator structure and common with/asynchronous machine is basic identical; Stator core that promptly is made up of silicon steel plate stacking and the stator coil that is embedded in the stator coring groove are formed, thereby and pass to three-phase alternating current and in stator coil, produce rotating magnetic field.Permanent magnet machine rotor mainly is made up of rotor core and permanent magnet, and this is the main distinction of magneto and other types motor, and rotor magnetic circuit structural is the key technology place of magneto.The magnetic structure that rotor adopts is different, and then the runnability of motor, control strategy, manufacturing process and use occasion are also different.
Different with the motor of other types; The main field of permagnetic synchronous motor produces by being fixed on the permanent magnet that distributes according to certain rules on the rotor, for improving the utilization ratio of permanent magnet, the motor that manufacturing structure is compact; Often air gap is less, so the air gap flux density distribution receives the influence of stator slot bigger.Operation has attracted cogging torque as far as motor for this, makes the output torque not steady; Power supply causes the back-emf harmonic wave to increase the weight of as far as motor, causes power factor (PF) to reduce.
In order to weaken the influence of slot effect, the skewed stator slot form is adopted in the motor manufacturing often, but skewed stator slot can cause the stator slot effective area to reduce, and influences the winding coil rule.And in high power permanent magnet synchronous motor was made, stator winding often adopted the moulding winding, and moulding winding setting-in difficulty in skewed stator slot is high, unsuitable large-scale production.The another kind of method that weakens slot effect is to adopt skewed-rotor, considers the rotor oblique difficulty of processing of rotor punching, the permanent magnet during utmost point continuously, therefore adopts the method equivalence skewed-rotor of rotor segmentation dislocation.
The oblique utmost point method of segmentation at present commonly used is that rotor integral body is comprised that permanent magnet is divided into several sections; Rotor component parts such as different segmentation rotor cores, rotating pole-piece structurally there are differences; Increased the manufacturing process complexity; Be unfavorable for large-scale production, and there is between segmentation the axially problem of leakage field in said segmentation method, reduced the utilance of permanent magnet.
One Chinese patent application has disclosed the permanent magnet machine rotor of the oblique utmost point of a kind of segmentation for No. 201110330939.0; Rotor core is adopted with a kind of rotor punching and is formed; At two sections that axially are divided into equal in length, after laminating, the two-stage rotor iron core between the pole center line of corresponding permanent magnet angle theta is arranged separately 3This permanent magnet machine rotor can't be avoided leakage field owing to do not limit the measure of the axial leakage field of segment end portion on the segmentation joint face, causes permanent magnet to utilize rate variance.
In addition, thereby though through suppressed between segmentation axially leakage field in the method for dividing intersegmental increase to avoid occurring the local leakage field of segmentation at a distance from the magnetic measure, the extra rotor component part that increased has reduced the effective axial length of motor, complicated manufacturing process.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes prior art, and a kind of segmentation skewed pole-shoe formula permanent magnet machine rotor is provided.
Rotor core in the segmentation skewed pole-shoe formula permanent magnet machine rotor through the rotating shaft key be fixed in the rotating shaft, permanent magnet is fixed on the rotor core outside; The rotating pole-piece that is used for reasonable distributed magnetic field is placed in the permanent magnet outside; Rotating pole-piece axially is being divided into plurality of sections; Rotate the θ angle that staggers around the shaft and axially superpose, rotating shaft is provided with the rotating shaft key, and rotor core is provided with the keyway that cooperates with the rotating shaft key.
Permanent magnet machine rotor adopts the radial permanent magnet body to magnetize, and said permanent magnet and iron core are continuous in the axial direction, and promptly week does not upwards misplace, and rotates angle θ=360 of staggering °/[N*LCM (Z in the rotating pole-piece of said adjacent sectional 1, 2p)], N is the rotating pole-piece segments, Z 1Be number of stator slots, p is the motor number of pole-pairs, LCM (Z 1, 2p) be Z 1Least common multiple with 2p.
The beneficial effect that the utility model compared with prior art has:
1) only through axial segmentation adjustment, realized the purpose of skewed-rotor, simplified manufacturing process, compared and the oblique utmost point method of segmentation, when utilization and labyrinth rotor, can further simplify the rotor element, helped extensive manufacturing rotating pole-piece.;
2) when weakening slot effect, avoided that the oblique utmost point of general rotor segmentation rotates permanent magnet and the axial problem of leakage field between the segmentation that causes.
Description of drawings
Fig. 1 is the oblique utmost point radial permanent magnet of a segmentation rotor leakage situation sketch map;
Fig. 2 is a segmentation skewed pole-shoe radial permanent magnet rotor sketch map;
Fig. 3 is a segmentation skewed pole-shoe p-m rotor schematic top plan view;
Among the figure: rotating shaft 1, rotor core 2, permanent magnet 3, rotating pole-piece 4, bolt hole 5, rotating shaft key 6, keyway 7.
Embodiment
Can know that by the oblique utmost point radial permanent magnet of Fig. 1 segmentation rotor leakage field situation sketch map general segmentation skewed pole rotor structure causes the axial leakage field situation of segmentation to take place in meeting, below in conjunction with accompanying drawing 2 and Fig. 3, further specifies the utility model:
Embodiment one:
Rotor core 2 in the segmentation skewed pole-shoe formula permanent magnet machine rotor through rotating shaft key 6 be fixed in the rotating shaft 1, permanent magnet 3 is fixed on rotor core 2 outsides; The rotating pole-piece 4 that is used for reasonable distributed magnetic field is placed in permanent magnet 3 outsides; Rotating pole-piece 4 axially is being divided into plurality of sections; Rotate the θ angle that staggers around the shaft and axially superpose, rotating shaft is provided with rotating shaft key 6, and rotor core is provided with the keyway 7 that cooperates with rotating shaft key 6.
Permanent magnet machine rotor adopts the radial permanent magnet body to magnetize, and said permanent magnet 3 is continuous in the axial direction with unshakable in one's determination 2, and promptly week does not upwards misplace, and rotates angle θ=360 of staggering °/[N*LCM (Z in the rotating pole-piece 4 of said adjacent sectional 1, 2p)], N is rotating pole-piece 4 segments, Z 1Be number of stator slots, p is the motor number of pole-pairs, LCM (Z 1, 2p) be Z 1Least common multiple with 2p.The medial surface that contacts with permanent magnet 3 in each segmentation rotating pole-piece 4 is consistent, and the lateral surface that contacts with air gap staggers along rotating in a circumferential direction.
Embodiment two: this embodiment is with the difference of embodiment one described a kind of segmentation skewed pole-shoe formula permanent magnet machine rotor; Said rotating pole-piece 4 is provided with bolt hole 5 with rotor core 2; Axial two sections of rotor are provided with end plate, through tightening bolt and end plate fixed rotor.
The principle of the utility model is: the magnetic flux that motor permanent magnet provides gets into air gap through rotating pole-piece, so the shape of rotating pole-piece can influence the motor gas-gap DISTRIBUTION OF MAGNETIC FIELD.When the permanent magnet position keeps fixing, when rotating pole-piece rotates in a circumferential direction a suitable angle, the air-gap field equal angular that also rotates in a circumferential direction relatively that distributes.Based on this, just realized the function of the oblique utmost point of rotor segmentation through the rotation of segmentation only pole shoe.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; The protection range of the utility model should not be regarded as and only limit to the concrete form that embodiment states, the protection range of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.

Claims (2)

1. segmentation skewed pole-shoe formula permanent magnet machine rotor; It is characterized in that rotor core through the rotating shaft key be fixed in the rotating shaft, permanent magnet is fixed on the rotor core outside; The rotating pole-piece that is used for reasonable distributed magnetic field is placed in the permanent magnet outside, and rotating pole-piece axially is being divided into plurality of sections, rotates the θ angle that staggers around the shaft and axially superposes; Rotating shaft is provided with the rotating shaft key, and rotor core is provided with the keyway that cooperates with the rotating shaft key.
2. a kind of segmentation skewed pole-shoe formula permanent magnet machine rotor as claimed in claim 1; It is characterized in that: permanent magnet machine rotor adopts the radial permanent magnet body to magnetize; Said permanent magnet and iron core are continuous in the axial direction; Promptly week does not upwards misplace, and rotates angle θ=360 stagger °/[N*LCM (Z in the rotating pole-piece of said adjacent sectional 1, 2p)], N is the rotating pole-piece segments, Z 1Be number of stator slots, p is the motor number of pole-pairs, LCM (Z 1, 2p) be Z 1Least common multiple with 2p.
CN2012201127241U 2012-03-23 2012-03-23 Segmental skewed pole shoe type permanent magnet motor rotor Withdrawn - After Issue CN202524197U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012201127241U CN202524197U (en) 2012-03-23 2012-03-23 Segmental skewed pole shoe type permanent magnet motor rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012201127241U CN202524197U (en) 2012-03-23 2012-03-23 Segmental skewed pole shoe type permanent magnet motor rotor

Publications (1)

Publication Number Publication Date
CN202524197U true CN202524197U (en) 2012-11-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012201127241U Withdrawn - After Issue CN202524197U (en) 2012-03-23 2012-03-23 Segmental skewed pole shoe type permanent magnet motor rotor

Country Status (1)

Country Link
CN (1) CN202524197U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624116A (en) * 2012-03-23 2012-08-01 浙江大学 Subsection skewed pole-shoe type permanent magnet motor rotor
CN104426264A (en) * 2013-09-10 2015-03-18 珠海格力节能环保制冷技术研究中心有限公司 Motor rotor magnetic steel fixing structure and motor with same
CN105556802A (en) * 2013-09-17 2016-05-04 三菱电机株式会社 Rotating electric machine and elevator hoisting machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624116A (en) * 2012-03-23 2012-08-01 浙江大学 Subsection skewed pole-shoe type permanent magnet motor rotor
CN102624116B (en) * 2012-03-23 2013-11-13 浙江大学 Subsection skewed pole-shoe type permanent magnet motor rotor
CN104426264A (en) * 2013-09-10 2015-03-18 珠海格力节能环保制冷技术研究中心有限公司 Motor rotor magnetic steel fixing structure and motor with same
CN105556802A (en) * 2013-09-17 2016-05-04 三菱电机株式会社 Rotating electric machine and elevator hoisting machine
CN105556802B (en) * 2013-09-17 2019-06-07 三菱电机株式会社 Rotating electric machine and elevator hoist

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CB03 Change of inventor or designer information

Inventor after: Huang Xiaoyan

Inventor after: Zhang Jiancheng

Inventor after: Fang Youtong

Inventor after: Ma Jien

Inventor after: Lu Qinfen

Inventor before: Zhang Jiancheng

Inventor before: Huang Xiaoyan

Inventor before: Fang Youtong

Inventor before: Ma Zikui

Inventor before: Ma Jien

Inventor before: Lu Qinfen

Inventor before: Dong Fan

Inventor before: Yin Xin

C53 Correction of patent for invention or patent application
COR Change of bibliographic data

Free format text: CORRECT: INVENTOR; FROM: ZHANG JIANCHENG HUANG XIAOYAN FANG YOUTONG MA ZIKUI MA JIEN LU QINFEN DONGFAN YIN XIN TO: HUANG XIAOYAN ZHANG JIANCHENG FANG YOUTONG MA JIEN LU QINFEN

RGAV Abandon patent right to avoid regrant
AV01 Patent right actively abandoned

Granted publication date: 20121107

Effective date of abandoning: 20131113