CN102624116A - Subsection skewed pole-shoe type permanent magnet motor rotor - Google Patents
Subsection skewed pole-shoe type permanent magnet motor rotor Download PDFInfo
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- CN102624116A CN102624116A CN2012100790148A CN201210079014A CN102624116A CN 102624116 A CN102624116 A CN 102624116A CN 2012100790148 A CN2012100790148 A CN 2012100790148A CN 201210079014 A CN201210079014 A CN 201210079014A CN 102624116 A CN102624116 A CN 102624116A
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Abstract
The invention discloses a step skewed pole-shoe type permanent magnet motor rotor. A rotor iron core is fixed on a rotating shaft through a rotating shaft key, a permanent magnet is fixed on the outer side of the rotor iron core, a rotor pole shoe used for reasonably distributing a magnetic field is arranged on the outer side of the permanent magnet, the rotor pole shoe is divided into a plurality of steps in the axial direction and rotates around the rotating shaft for staggering for an angle theta to be axially overlapped, a rotating shaft key is arranged on the rotating shaft, and the rotor iron core is provided with a key slot matched with the rotating shaft key. The permanent magnet and the iron core are continuous in the axial direction, namely can not be misplaced in the circumferential direction, the angle theta staggered in the adjacent steps of rotor pole shoe through rotation is equal to 360 DEG/[N*LCM(Z1,2p)], N represents the quantity of the steps of the rotor pole shoe, Z1 represents the quantity of stator slots, p represents the quantity of motor pole pairs, and LCM(Z1,2p) represents the lowest common multiple of Z1 and 2p. Through axial step regulation of the rotor pole shoe, the purpose of skewing of the rotor is realized, the manufacture process is simplified, and meanwhile, the problem of axial magnetic leakage among the steps due to the rotation of the permanent magnet by step skewing of the common rotor is avoided.
Description
Technical field
The present invention relates to the rotor of magneto, relate 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 objective of the invention is to overcome the deficiency of prior art, 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 present invention 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 present invention:
Embodiment one:
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.
Principle of the present invention 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; Protection scope of the present invention should not be regarded as and only limit to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100790148A CN102624116B (en) | 2012-03-23 | 2012-03-23 | Subsection skewed pole-shoe type permanent magnet motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100790148A CN102624116B (en) | 2012-03-23 | 2012-03-23 | Subsection skewed pole-shoe type permanent magnet motor rotor |
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| Publication Number | Publication Date |
|---|---|
| CN102624116A true CN102624116A (en) | 2012-08-01 |
| CN102624116B CN102624116B (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100790148A Active CN102624116B (en) | 2012-03-23 | 2012-03-23 | Subsection skewed pole-shoe type permanent magnet motor rotor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852491A (en) * | 2015-05-14 | 2015-08-19 | 无锡信捷电气股份有限公司 | Method of designing segmented oblique polar angle of permanent magnet synchronous motor magnet steel |
| CN110994828A (en) * | 2019-12-18 | 2020-04-10 | 杭州易泰达科技有限公司 | Rotor oblique pole structure for improving running characteristic of synchronous reluctance motor |
| WO2023124152A1 (en) * | 2021-12-27 | 2023-07-06 | 华为数字能源技术有限公司 | Rotor core, rotor, motor, motor driving system and electric vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3849682A (en) * | 1973-06-19 | 1974-11-19 | Nat Res Dev | Permanent magnet rotor for alternating current generators and motors |
| WO1991016754A1 (en) * | 1990-04-24 | 1991-10-31 | Toeroek Vilmos | Synchronous machine |
| WO2009026690A2 (en) * | 2007-08-24 | 2009-03-05 | Sunco Investments Ltd. | Multistage variable reluctance motor/generator |
| CN202524197U (en) * | 2012-03-23 | 2012-11-07 | 浙江大学 | Segmental skewed pole shoe type permanent magnet motor rotor |
-
2012
- 2012-03-23 CN CN2012100790148A patent/CN102624116B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3849682A (en) * | 1973-06-19 | 1974-11-19 | Nat Res Dev | Permanent magnet rotor for alternating current generators and motors |
| WO1991016754A1 (en) * | 1990-04-24 | 1991-10-31 | Toeroek Vilmos | Synchronous machine |
| WO2009026690A2 (en) * | 2007-08-24 | 2009-03-05 | Sunco Investments Ltd. | Multistage variable reluctance motor/generator |
| CN202524197U (en) * | 2012-03-23 | 2012-11-07 | 浙江大学 | Segmental skewed pole shoe type permanent magnet motor rotor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852491A (en) * | 2015-05-14 | 2015-08-19 | 无锡信捷电气股份有限公司 | Method of designing segmented oblique polar angle of permanent magnet synchronous motor magnet steel |
| CN110994828A (en) * | 2019-12-18 | 2020-04-10 | 杭州易泰达科技有限公司 | Rotor oblique pole structure for improving running characteristic of synchronous reluctance motor |
| WO2023124152A1 (en) * | 2021-12-27 | 2023-07-06 | 华为数字能源技术有限公司 | Rotor core, rotor, motor, motor driving system and electric vehicle |
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| Publication number | Publication date |
|---|---|
| CN102624116B (en) | 2013-11-13 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| 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 |
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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 |
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