CN104852493A - Built-in permanent-magnet synchronous motor rotor - Google Patents
Built-in permanent-magnet synchronous motor rotor Download PDFInfo
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- CN104852493A CN104852493A CN201510215784.4A CN201510215784A CN104852493A CN 104852493 A CN104852493 A CN 104852493A CN 201510215784 A CN201510215784 A CN 201510215784A CN 104852493 A CN104852493 A CN 104852493A
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- magnetic pole
- synchronous motor
- motor rotor
- magnet synchronous
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Abstract
The invention relates to a built-in permanent-magnet synchronous motor rotor provided with a punching plate topology. The rotor has at least one pair of magnetic poles. Each pair of magnetic poles is distributed asymmetrically, wherein one magnetic pole is composed of at least two layers of magnetic steel, the other magnetic pole is composed of at least one layer of magnetic steel, and the q-axis center line between the two magnetic poles is provided with an air hole used to prevent leakage of the lower layer of magnetic steel and make the magnetic circuit orderly. According to the built-in permanent-magnet synchronous motor rotor with a special topology, the torque density and power density of a motor are increased through asymmetric design of the magnetic poles on the rotor and reasonable addition of reinforcement ribs. Compared with other typical structures, the adoption of the asymmetric structure helps reduce the number of magnetic steel blocks. Thus, the built-in permanent-magnet synchronous motor rotor has high manufacturability.
Description
Technical field
The present invention relates to a kind of permanent magnet machine rotor, specifically a kind of built-in permanent magnet motor rotor with high convex grey subset.
Background technology
Compared with traditional electro-magnetic motor, it is simple that magneto, particularly rare-earth permanent-magnet electric machine have structure, reliable; Volume is little, and quality is light; Loss is little, and efficiency is high; The shape and size of motor versatile and flexiblely can wait remarkable advantage.Thus the very wide model of range of application, almost throughout the every field of Aero-Space, national defence, industrial and agricultural production and daily life.
Permagnetic synchronous motor obtains and applies very widely in Automobile drive, in order to increase torque density and the power density of motor as much as possible, generally needs motor to have higher convex grey subset, namely needs motor to have higher reluctance torque component.
The method increasing motor convex grey subset has a lot, utilize special rotor structure, convex grey subset can be regulated within the specific limits, more typically V-structure and V+1 structure, but when ask for something harshness, the rotor of typical structure is difficult to meet design requirement, and needs the rotor structure with higher convex grey subset.
Tangential permanent magnetic motor rotor construction has higher convex grey subset, but it often can be restricted in mechanical strength.
Summary of the invention
The object of the invention is, for the deficiencies in the prior art, provide a kind of novel internal permanent magnet synchronous motor rotor.
For achieving the above object, technical scheme of the present invention is: a kind of internal permanent magnet synchronous motor rotor, there is punching topological structure, it is characterized in that: described rotor at least has a pair magnetic pole, often pair of magnetic pole is mal-distribution, and one of them magnetic pole is at least made up of two-layer magnet steel, and another magnetic pole is at least made up of one deck magnet steel, q shaft centre line in the middle of two magnetic poles is provided with airport, for preventing the leakage field of lower floor's magnet steel and regular magnetic circuit.
Described rotor has the magnetic pole of single or multiple lift magnet steel, and every layer of magnet steel is made up of jointly one or more permanent magnet.
The center line of the airport in the middle of described magnetic pole on q axle overlaps with q shaft centre line.
Airport on described q axle and be provided with a reinforcement between lower floor's magnet steel of multilayer magnetic pole, plays restriction leakage field and the effect increasing mechanical strength.
Described rotor structure has a plurality of thin narrow airport to coordinate regular magnetic circuit.
The invention has the beneficial effects as follows:
(1) compared to the reluctance torque magnetic circuit (Fig. 1) of typical V+1 structure, the reluctance torque magnetic circuit (Fig. 2) of new construction of the present invention is more even, larger reluctance torque can be produced, simulation analysis shows, under the restriction of same back-emf, the torque that same current produces comparatively V+1 structure improves more than 5%, and power density improves more than 5%.
(2) adopt the motor of this new structure to have good unloaded counter potential waveform (Fig. 3), harmonic content is less, and has more symmetrical unloaded air gap magnetic density waveform (Fig. 4)
(3) the larger airport on q shaft centre line plays the effect reducing leakage field, profit can increase the width of second layer magnet steel in this way, and the asymmetric electrode structure be combined, reduce the increase of the leakage field caused due to the increase of magnetic steel ingot number, make the utilance of magnet steel higher.
(4) owing to have employed asymmetric electrode structure, the more typical V+1 structure of epitrochanterian magnetic steel ingot number have dropped half, decreases the assembling cost of magnet steel and the processing cost of magnet steel.
(5) compared to the rotor of typical asymmetric electrode structure, new structure of the present invention with the addition of auxiliary magnet steel in the place being originally iron pole, and effectively increase poly-magnetic effect, make rotor magnetic circuit more symmetrical, magnetic circuit is more regular.
The present invention is as a kind of permanent magnet machine rotor with special topological structure, by the asymmetric design of magnetic pole on rotor and the reasonable interpolation of reinforcement, add torque density and the power density of motor, and owing to comparing other typical structures, have employed unsymmetric structure, reduce the block number of magnet steel, therefore there is higher manufacturability simultaneously.
Accompanying drawing explanation
Fig. 1 is the reluctance torque magnetic circuit figure of typical V+1 structure;
Fig. 2 is the reluctance torque magnetic circuit figure of new structure of the present invention;
Fig. 3 is the good unloaded counter potential waveform adopting the motor of new structure of the present invention to have;
Fig. 4 is the more symmetrical unloaded air gap magnetic density waveform adopting the motor of new structure of the present invention to have;
Fig. 5 is the lamination structure schematic diagram of novel rotor of the present invention.
Embodiment
Below in conjunction with specific embodiments and the drawings, further illustrate the present invention.
A kind of internal permanent magnet synchronous motor rotor, there is a kind of special rotor punching topological structure: its rotor at least has a pair magnetic pole, often pair of magnetic pole is mal-distribution, one of them magnetic pole is at least made up of two-layer magnet steel, another magnetic pole is at least made up of one deck magnet steel, and the q shaft centre line in the middle of two magnetic poles has larger airport to prevent the leakage field of lower floor's magnet steel and regular magnetic circuit.This structure makes motor have higher convex grey subset, the automobile drive electric motor of this construction rotor is adopted to have higher torque density and power density, the size of motor can be effectively reduced, save the material usage of motor, make motor compacter, there is higher mechanical strength simultaneously, to meet the high-speed cruising of motor.The center line of the airport in the middle of magnetic pole on q axle overlaps with q shaft centre line.There is a reinforcement between lower floor's magnet steel of the airport on q axle and multilayer magnetic pole, play restriction leakage field and the effect increasing mechanical strength.This rotor has the magnetic pole of multilayer magnet steel, and every layer of magnet steel is made up of jointly one or more permanent magnet.This rotor has the magnetic pole of individual layer magnet steel, and every layer of magnet steel is made up of jointly one or more permanent magnet.This rotor structure has a plurality of thin narrow airport to coordinate regular magnetic circuit.
As shown in Figure 5, the rotor punching of motor has unsymmetric structure, groove 1, groove 22, groove 33 are magnet steel groove, form a pair magnetic pole, the magnetic pole of four pairs of same structures is had in this schematic construction, its middle slot 1 is two-layer up and down with groove 22, the magnet steel of assembling two pieces of same pole orientation, groove 33 assembles the magnet steel of another one pole orientation, hole 44, with hole 55 be the airport on q shaft centre line, utilize this group airport, magnet steel leakage field can be effectively reduced, the q axle magnetic circuit of regular motor, increases the convex grey subset of motor.Kong Liuzhi hole 96,7,8,9 is thin narrow airport, in order to further regular magnetic circuit.
In figure, 10 and 11 positions are two reinforcements, utilize this reinforcement, effectively can improve the mechanical strength of rotor, reduce the maximum stress that rotor bears when High Rotation Speed.
Claims (5)
1. an internal permanent magnet synchronous motor rotor, there is punching topological structure, it is characterized in that: described rotor at least has a pair magnetic pole, often pair of magnetic pole is mal-distribution, one of them magnetic pole is at least made up of two-layer magnet steel, another magnetic pole is at least made up of one deck magnet steel, and the q shaft centre line in the middle of two magnetic poles is provided with airport, for preventing the leakage field of lower floor's magnet steel and regular magnetic circuit.
2. internal permanent magnet synchronous motor rotor according to claim 1, is characterized in that: described rotor has the magnetic pole of single or multiple lift magnet steel, every layer of magnet steel is made up of jointly one or more permanent magnet.
3. internal permanent magnet synchronous motor rotor according to claim 1, is characterized in that: the center line of the airport in the middle of described magnetic pole on q axle overlaps with q shaft centre line.
4. internal permanent magnet synchronous motor rotor according to claim 1, is characterized in that: the airport on described q axle and be provided with a reinforcement between lower floor's magnet steel of multilayer magnetic pole, plays restriction leakage field and the effect increasing mechanical strength.
5. the internal permanent magnet synchronous motor rotor according to any one of claim 1 or 4, is characterized in that: described rotor structure has a plurality of thin narrow airport to coordinate regular magnetic circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215784.4A CN104852493A (en) | 2015-04-29 | 2015-04-29 | Built-in permanent-magnet synchronous motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510215784.4A CN104852493A (en) | 2015-04-29 | 2015-04-29 | Built-in permanent-magnet synchronous motor rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104852493A true CN104852493A (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510215784.4A Pending CN104852493A (en) | 2015-04-29 | 2015-04-29 | Built-in permanent-magnet synchronous motor rotor |
Country Status (1)
| Country | Link |
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| CN (1) | CN104852493A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181337A (en) * | 2017-06-14 | 2017-09-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Asymmetric rotor structure, method to set up and the synchronous magnetic resistance motor of motor |
| US10186917B2 (en) | 2016-05-24 | 2019-01-22 | Unison Industries, Llc | Rotor assembly for a power generation system |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006121765A (en) * | 2004-10-19 | 2006-05-11 | Mitsubishi Electric Corp | Reluctance rotary electric machine |
| CN101026318A (en) * | 2005-12-19 | 2007-08-29 | 艾默生电气公司 | Composite magnet structure for rotor |
| CN201656605U (en) * | 2010-02-11 | 2010-11-24 | 华北电力大学（保定） | Permanent magnet traction motor with broader speed-enlarging range |
| WO2013133474A1 (en) * | 2012-03-08 | 2013-09-12 | 일진전기 주식회사 | Interior permanent magnet motor |
| CN203251159U (en) * | 2013-05-03 | 2013-10-23 | 苏州和鑫电气股份有限公司 | Double layer V type built-in permanent magnet motor rotor applied to electric car |
| CN104038006A (en) * | 2013-03-08 | 2014-09-10 | 通用汽车环球科技运作有限责任公司 | Interior permanent magnet machine having mixed rare earth magnet and ferrite magnet rotor |
| CN104106198A (en) * | 2012-05-28 | 2014-10-15 | 株式会社日立产机系统 | Composite torque rotating electric machine |
| CN204578233U (en) * | 2015-04-29 | 2015-08-19 | 华域汽车电动系统有限公司 | Internal permanent magnet synchronous motor rotor |
-
2015
- 2015-04-29 CN CN201510215784.4A patent/CN104852493A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006121765A (en) * | 2004-10-19 | 2006-05-11 | Mitsubishi Electric Corp | Reluctance rotary electric machine |
| CN101026318A (en) * | 2005-12-19 | 2007-08-29 | 艾默生电气公司 | Composite magnet structure for rotor |
| CN201656605U (en) * | 2010-02-11 | 2010-11-24 | 华北电力大学（保定） | Permanent magnet traction motor with broader speed-enlarging range |
| WO2013133474A1 (en) * | 2012-03-08 | 2013-09-12 | 일진전기 주식회사 | Interior permanent magnet motor |
| CN104106198A (en) * | 2012-05-28 | 2014-10-15 | 株式会社日立产机系统 | Composite torque rotating electric machine |
| CN104038006A (en) * | 2013-03-08 | 2014-09-10 | 通用汽车环球科技运作有限责任公司 | Interior permanent magnet machine having mixed rare earth magnet and ferrite magnet rotor |
| CN203251159U (en) * | 2013-05-03 | 2013-10-23 | 苏州和鑫电气股份有限公司 | Double layer V type built-in permanent magnet motor rotor applied to electric car |
| CN204578233U (en) * | 2015-04-29 | 2015-08-19 | 华域汽车电动系统有限公司 | Internal permanent magnet synchronous motor rotor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10186917B2 (en) | 2016-05-24 | 2019-01-22 | Unison Industries, Llc | Rotor assembly for a power generation system |
| CN107181337A (en) * | 2017-06-14 | 2017-09-19 | 珠海格力节能环保制冷技术研究中心有限公司 | Asymmetric rotor structure, method to set up and the synchronous magnetic resistance motor of motor |
| CN107181337B (en) * | 2017-06-14 | 2023-06-30 | 珠海格力节能环保制冷技术研究中心有限公司 | Asymmetric rotor structure of motor, setting method and synchronous reluctance motor |
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Application publication date: 20150819 |