CN204967578U - Reduce PMSM torque ripple's rotor structure - Google Patents
Reduce PMSM torque ripple's rotor structure Download PDFInfo
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- CN204967578U CN204967578U CN201520739262.XU CN201520739262U CN204967578U CN 204967578 U CN204967578 U CN 204967578U CN 201520739262 U CN201520739262 U CN 201520739262U CN 204967578 U CN204967578 U CN 204967578U
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- rotor
- permanent magnet
- torque ripple
- pole
- lightening hole
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Abstract
The utility model relates to a reduce PMSM torque ripple's rotor structure, a plurality of pole pairs of rotor, its characterized in that are placed in even including the rotor with along rotor circumference: every pole pair comprises two polarity identical's permanent magnet and two permanent magnet symmetrical arrangements are the V font, the polarity of adjacent pole pair is opposite, the rotor corresponds the position of permanent magnet and has seted up the permanent magnet groove, the rotor corresponds permanent magnet groove both ends position and sets up its and communicating air flux barrier, form between two air flux barrier bottom the V font with being close to of a pair of magnetic pole and separate the magnetic bridge and separate magnetic bridge both sides face parallel, the top that is close to V font division actinal air flux barrier is parallel with corresponding rotor outer peripheral face, little lightening hole has been seted up to the position that the rotor corresponds between every pole pair and the rotor shaft, big lightening hole has been seted up to the position that the rotor corresponds between two little lightening holes, greatly, little lightening hole uses the rotor shaft to distribute as central symmetry respectively. Its simple structure, use are reliably.
Description
Technical field
The utility model relates to a kind of permanent-magnetic synchronous motor rotor, particularly a kind of rotor structure reducing permagnetic synchronous motor torque ripple.
Background technology
Permagnetic synchronous motor has high efficiency, high Driving Torque, high power density and good dynamic property, is used widely in the automotive industry.Permanent magnet due to interior permanent magnet machines is embedded in inside rotor core, makes it have the protective action of demagnetization when weak magnetic field operation, so interior permanent magnet machines not easily demagnetizes than surface-mounted permanent magnet machine.Simultaneously because interior permanent magnet machines d axle inductance is greater than surface-mount type permanent magnetic motor, and d axle inductance is less than q axle inductance, there is reluctance torque, so it has wider invariable power scope and excellent weak magnetism speed expansion ability, large torque is exported when being highly suitable for startup, low speed or climbing, export high-power when high speed, and wide speed regulating range, high reliability vehicle environmental in.
Vehicle running smoothness weighs Integral automobile performance important indicator, if vehicle running smoothness is not good, occupant causes tired and uncomfortable sensation together with body vibrations.Therefore in the ideal case, for producing constant electromagnetic torque, the electromotive force of permagnetic synchronous motor requires as sinusoidal wave, but built-in permanent-magnet synchronous motor due to magnetic circuit asymmetric, cause excitation field wave distortion serious, thus it is excessive to cause motor torque to fluctuate, and has a strong impact on vehicle running smoothness.How to reduce internal permanent magnet synchronous motor torque ripple, become the focus instantly studied, CN103560636A discloses a kind of method reducing magneto torque ripple used for electric vehicle, but it is the torque ripple utilizing the method for the tooth edge thickness controlling stator tooth to reduce motor, the application puts forth effort on and changes rotor structure to reduce the torque ripple of motor.
Summary of the invention
The purpose of this utility model is the rotor structure in order to provide a kind of reduction permagnetic synchronous motor torque ripple in the constant situation of specified Driving Torque, and structure is simple, use is reliable.
The technical solution of the utility model is:
A kind of rotor structure reducing permagnetic synchronous motor torque ripple, comprise rotor and be evenly built in a plurality of pole pairs in rotor along periphery of rotor, it is characterized in that: each pole pair is made up of the permanent magnet that two pieces of polarity is identical and two pieces of permanent magnet symmetric arrays are in the shape of the letter V, the polarity of adjacent pole pair is contrary, the position of the corresponding permanent magnet of described rotor offers permanent magnet trough, the corresponding permanent magnet trough end positions of described rotor offers itself and the air magnet isolation tank communicated, to be formed every magnetic bridge and parallel every magnetic bridge two sides with between two air magnet isolation tanks bottom the close V-shaped of a pair magnetic pole, top near the air magnet isolation tank of v-shaped openings side is parallel with corresponding rotor outer periphery face, position between the corresponding each pole pair of described rotor and armature spindle offers little lightening hole, position between corresponding two the little lightening holes of described rotor offers large lightening hole, greatly described, little lightening hole is symmetrical centered by armature spindle respectively.
The rotor structure of above-mentioned reduction permagnetic synchronous motor torque ripple, described little lightening hole is circular hole, and its center of circle overlaps with the symmetrical center line of corresponding pole pair.
The rotor structure of above-mentioned reduction permagnetic synchronous motor torque ripple, the symmetrical center line of described large lightening hole overlaps with the symmetrical center line of adjacent two pole pairs.
The rotor structure of above-mentioned reduction permagnetic synchronous motor torque ripple, described permanent magnet trough edge is separately provided with afterbody positioning groove.
The rotor structure of above-mentioned reduction permagnetic synchronous motor torque ripple, the angle with two pieces of permanent magnets of a pair magnetic pole is 124 °-126 °.
The rotor structure of above-mentioned reduction permagnetic synchronous motor torque ripple, described permanent magnet is the rectangle ndfeb magnet of consistent size.
The beneficial effects of the utility model are: when permagnetic synchronous motor runs, average torque is produced after the induced electromotive force that number of times is identical and current harmonics effect, different times harmonic electromotive force and the function of current produce ripple harmonic torque, thus produce machinery and electromagnetic noise, affect motor even running and reliability.Rotor structure described in the application adopts built-in radial formula magnetic structure, maintain conventional internal formula magneto by the asymmetric generation reluctance torque of magnetic circuit to improve electromotor overload ability and power density capabilities, simultaneously when ensureing that air gap flux density size is constant, magnetic circuit is optimized by arranging lightening hole and improving air magnet isolation tank, air gap magnetic density waveform aberration rate is reduced, reduces motor torque fluctuation.Wherein, the layout designs of lightening hole, when ensureing rotor strength, reducing the moment of inertia of rotor on the one hand, improve control precision, reduce leakage field on the other hand, makes magnetic circuit distribute rationally, reduces the close harmonic content of magnetic.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 be adopt the application rotor structure with do not adopt the motor gas-gap magnetic flux density waveforms of the application's rotor structure compare schematic diagram;
Fig. 3 be adopt the application rotor structure with do not adopt the no-load back electromotive force harmonic analysis of the application's rotor structure compare schematic diagram.
In figure: 1. rotor, 2. permanent magnet, 3. permanent magnet trough, 4. air magnet isolation tank, 5. every magnetic bridge, 6. armature spindle, 7. little lightening hole, 8. large lightening hole, 9. afterbody positioning groove.
Embodiment
As shown in Figure 1, the rotor structure of this reduction permagnetic synchronous motor torque ripple, comprise rotor 1 and be evenly built in a plurality of pole pairs in rotor 1 along rotor 1 circumference, each pole pair is made up of the permanent magnet 2 that two pieces of polarity is identical and two pieces of permanent magnet 2 symmetric arrays are in the shape of the letter V, and the angle with two pieces of permanent magnets 2 of a pair magnetic pole is 124 °-126 °.The polarity of adjacent pole pair is contrary, the position of the corresponding permanent magnet 2 of described rotor 1 offers permanent magnet trough 3, described rotor 1 corresponding permanent magnet trough 3 end positions offers itself and the air magnet isolation tank 4 communicated, to be formed every magnetic bridge 5 and parallel every magnetic bridge 5 two sides with between two air magnet isolation tanks 4 bottom the close V-shaped of a pair magnetic pole, top near the air magnet isolation tank 4 of v-shaped openings side is parallel with corresponding rotor 1 outer peripheral face, position between the corresponding each pole pair of described rotor 1 and armature spindle 6 offers little lightening hole 7, position between corresponding two the little lightening holes 7 of described rotor 1 offers large lightening hole 8, greatly described, little lightening hole 8, 7 is symmetrical centered by armature spindle 6 respectively.Described little lightening hole 7 is circular hole, and its center of circle overlaps with the symmetrical center line of corresponding pole pair.The symmetrical center line of described large lightening hole 8 overlaps with the symmetrical center line of adjacent two pole pairs.Described permanent magnet trough 3 edge is separately provided with afterbody positioning groove 9.In the present embodiment, described permanent magnet 2 is the rectangle ndfeb magnet of consistent size, and the angle with two pieces of permanent magnets 2 of a pair magnetic pole is 126 °.
The rotor structure optimization of the application does not adopt the interval pull up torque fluctuation of the permanent magnet synchronous motor permanent torque of the rotor structure of the application to be reduced to 2.5% by original 9% afterwards relatively, and the breakdown torque fluctuation in invariable power interval is reduced to 14% by original 50%.In motor performance, torque ripple is effectively suppressed, and motor quality is increased substantially, effectively can improve electric machine combination property, realizes the fluctuation of permagnetic synchronous motor low torque, even running, see Fig. 2, Fig. 3.
Claims (6)
1. one kind is reduced the rotor structure of permagnetic synchronous motor torque ripple, comprise rotor and be evenly built in a plurality of pole pairs in rotor along periphery of rotor, it is characterized in that: each pole pair is made up of the permanent magnet that two pieces of polarity is identical and two pieces of permanent magnet symmetric arrays are in the shape of the letter V, the polarity of adjacent pole pair is contrary, the position of the corresponding permanent magnet of described rotor offers permanent magnet trough, the corresponding permanent magnet trough end positions of described rotor offers itself and the air magnet isolation tank communicated, to be formed every magnetic bridge and parallel every magnetic bridge two sides with between two air magnet isolation tanks bottom the close V-shaped of a pair magnetic pole, top near the air magnet isolation tank of v-shaped openings side is parallel with corresponding rotor outer periphery face, position between the corresponding each pole pair of described rotor and armature spindle offers little lightening hole, position between corresponding two the little lightening holes of described rotor offers large lightening hole, greatly described, little lightening hole is symmetrical centered by armature spindle respectively.
2. the rotor structure of reduction permagnetic synchronous motor torque ripple according to claim 1, it is characterized in that: described little lightening hole is circular hole, and its center of circle overlaps with the symmetrical center line of corresponding pole pair.
3. the rotor structure of reduction permagnetic synchronous motor torque ripple according to claim 1, is characterized in that: the symmetrical center line of described large lightening hole overlaps with the symmetrical center line of adjacent two pole pairs.
4. the rotor structure of reduction permagnetic synchronous motor torque ripple according to claim 1, is characterized in that: described permanent magnet trough edge is separately provided with afterbody positioning groove.
5. the rotor structure of reduction permagnetic synchronous motor torque ripple according to claim 1, is characterized in that: the angle with two pieces of permanent magnets of a pair magnetic pole is 124 °-126 °.
6. the rotor structure of reduction permagnetic synchronous motor torque ripple according to claim 1, is characterized in that: described permanent magnet is the rectangle ndfeb magnet of consistent size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520739262.XU CN204967578U (en) | 2015-09-23 | 2015-09-23 | Reduce PMSM torque ripple's rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520739262.XU CN204967578U (en) | 2015-09-23 | 2015-09-23 | Reduce PMSM torque ripple's rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204967578U true CN204967578U (en) | 2016-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520739262.XU Expired - Fee Related CN204967578U (en) | 2015-09-23 | 2015-09-23 | Reduce PMSM torque ripple's rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204967578U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451858A (en) * | 2016-12-16 | 2017-02-22 | 合肥巨动力系统有限公司 | Light-weight motor rotor iron core and design method of lightening hole thereof |
| CN106787318A (en) * | 2016-12-28 | 2017-05-31 | 卧龙电气集团股份有限公司 | Permagnetic synchronous motor p-m rotor punching and permagnetic synchronous motor |
| CN106787317A (en) * | 2016-12-22 | 2017-05-31 | 温岭市九洲电机制造有限公司 | A kind of punching of permanent magnet machine rotor |
| CN107516953A (en) * | 2017-10-23 | 2017-12-26 | 安徽栋霖电气有限公司 | A kind of mixed type permanent-magnet pole rotor |
| CN109256878A (en) * | 2018-08-07 | 2019-01-22 | 珠海格力电器股份有限公司 | Rotor assembly and permanent magnet motor |
| CN109314419A (en) * | 2016-06-02 | 2019-02-05 | 大众汽车有限公司 | The rotor core used with permanent magnet or the electric machine used with this rotor core |
| CN111082559A (en) * | 2018-10-19 | 2020-04-28 | 本田技研工业株式会社 | Rotor |
| US11095198B2 (en) | 2018-09-28 | 2021-08-17 | General Electric Company | Electric machine assembly with reduced rotor post leakage |
| CN114400804A (en) * | 2022-01-24 | 2022-04-26 | 中车永济电机有限公司 | Permanent magnet synchronous motor rotor structure with low torque fluctuation |
-
2015
- 2015-09-23 CN CN201520739262.XU patent/CN204967578U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109314419A (en) * | 2016-06-02 | 2019-02-05 | 大众汽车有限公司 | The rotor core used with permanent magnet or the electric machine used with this rotor core |
| CN106451858A (en) * | 2016-12-16 | 2017-02-22 | 合肥巨动力系统有限公司 | Light-weight motor rotor iron core and design method of lightening hole thereof |
| CN106451858B (en) * | 2016-12-16 | 2018-10-30 | 合肥巨一动力系统有限公司 | A kind of lightweight motor rotor core and its lightening hole design method |
| CN106787317A (en) * | 2016-12-22 | 2017-05-31 | 温岭市九洲电机制造有限公司 | A kind of punching of permanent magnet machine rotor |
| CN106787318A (en) * | 2016-12-28 | 2017-05-31 | 卧龙电气集团股份有限公司 | Permagnetic synchronous motor p-m rotor punching and permagnetic synchronous motor |
| CN107516953A (en) * | 2017-10-23 | 2017-12-26 | 安徽栋霖电气有限公司 | A kind of mixed type permanent-magnet pole rotor |
| CN109256878A (en) * | 2018-08-07 | 2019-01-22 | 珠海格力电器股份有限公司 | Rotor assembly and permanent magnet motor |
| US11095198B2 (en) | 2018-09-28 | 2021-08-17 | General Electric Company | Electric machine assembly with reduced rotor post leakage |
| US11606012B2 (en) | 2018-09-28 | 2023-03-14 | General Electric Company | Electric machine assembly with reduced rotor post leakage |
| CN111082559A (en) * | 2018-10-19 | 2020-04-28 | 本田技研工业株式会社 | Rotor |
| CN111082559B (en) * | 2018-10-19 | 2022-04-22 | 本田技研工业株式会社 | Rotor |
| US11411451B2 (en) | 2018-10-19 | 2022-08-09 | Honda Motor Co., Ltd. | Rotor |
| CN114400804A (en) * | 2022-01-24 | 2022-04-26 | 中车永济电机有限公司 | Permanent magnet synchronous motor rotor structure with low torque fluctuation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160113 Termination date: 20160923 |