CN107508397A - A kind of Over Electric Motor with PMSM new type rotor structure - Google Patents
A kind of Over Electric Motor with PMSM new type rotor structure Download PDFInfo
- Publication number
- CN107508397A CN107508397A CN201710822864.5A CN201710822864A CN107508397A CN 107508397 A CN107508397 A CN 107508397A CN 201710822864 A CN201710822864 A CN 201710822864A CN 107508397 A CN107508397 A CN 107508397A
- Authority
- CN
- China
- Prior art keywords
- circular arc
- pmsm
- axis side
- electric motor
- rotor structure
- 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.)
- Pending
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Classifications
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
-
- 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
- H02K21/02—Details
- H02K21/021—Means for mechanical adjustment of the excitation flux
- H02K21/022—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator
- H02K21/025—Means for mechanical adjustment of the excitation flux by modifying the relative position between field and armature, e.g. between rotor and stator by varying the thickness of the air gap between field and armature
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The invention discloses a kind of Over Electric Motor with PMSM new type rotor structure, the permanent magnet of the rotor structure is three sections of fold-line-shapeds, rotor core two kinds of circular arcs different using the center of circle but head and the tail interconnection near quadrature axis near the d-axis, while open angle-shaped groove in the intersection of two kinds of circular arcs.The rotor structure of the present invention uses less permanent magnet, reduces production cost, can reach the waveform of optimization PMSM Air Gap Flux, it is closer to sine, improves the fundamental wave content in air-gap field, effectively reduces higher harmonic content；Cogging torque can also be reduced simultaneously, reduces vibration and the noise of motor operation, improves the stability of motor operation, improve the efficiency of Over Electric Motor with PMSM.
Description
Technical field
The invention belongs to technical field of motors, and in particular to a kind of Over Electric Motor with PMSM novel rotor knot
Structure.
Background technology
With the development of society, the progress of science and technology, the mankind are faced with increasingly severe energy crisis and environmental pollution,
The characteristics of electric automobile is because of its energy-saving and environmental protection are as various countries and the direction of development of company, and motor is the key of electric automobile
Part, therefore, research and development efficiently, stably, disclosure satisfy that the motor of electric automobile during traveling requirement is necessary.Rare-earth permanent-magnet electric machine because
The advantages that its small volume, efficiency high, loss low, motor flexible shapes, is widely applied on electric automobile, however, currently existing
Many deficiencies also be present in rare-earth permanent-magnet electric machine used for electric vehicle：Noise is big, torque ripple is big, stability is poor etc., it is difficult to meets electricity
The requirement of electrical automobile.
Ideally, the current of electric of Sine distribution and the air gap of Sine distribution be forever during the operation of permasyn morot
The close interaction of magnetic magnetic.Permasyn morot uses vector controlled, and current of electric can be by Sine distribution, but because permanent magnetism is same
The magnetic structure feature of motor in itself is walked, contains substantial amounts of higher hamonic wave in air-gap field, its permanent magnetism magnetic flux density waveforms is far from sine
Distribution, but distortion is distributed in echelon, also contains substantial amounts of harmonic wave in the no-load back electromotive force waveform of motor so as to cause.So
The torque ripple for causing motor is become big, the vibration and noise during motor operation will also become big, can also cause electric machine iron core to be lost
Increase, reduce the efficiency of motor.Phase interaction between permanent magnet and armature tooth when cogging torque is magneto winding no power
Caused by tangential component, it can cause the reduction of system control accuracy, while can also increase torque ripple, vibration and noise.
In the prior art, by changing permanent magnetism shape, can realize to the excellent of air-gap field waveform to a certain extent
Change, permanent magnet use circular arc, can make air-gap field waveform closer to sinusoidal, but this structure use the volume of permanent magnet compared with
Greatly, cost is higher；Prior art also improves the waveform of air-gap field using the structure of non-uniform gap, but for reducing tooth
The effect of groove torque and air-gap field higher hamonic wave is not ideal.
The content of the invention
It is an object of the invention to provide a kind of internal permanent magnet synchronous motor rotor structure used for electric vehicle, tooth can be reduced
Groove torque, air-gap field higher harmonic content, air gap flux density and no-load back electromotive force waveform is set to be more nearly sine, while with showing
There is arc-shaped permanent magnet rotor structure to compare, less permanent-magnet material can be used.
The present invention uses following technical scheme：
A kind of Over Electric Motor with PMSM new type rotor structure, including rotating shaft, rotor core, permanent magnet, it is described
For rotor core in rotating shaft, the edge on rotor core surface is distributed several permanent magnets；The permanent magnet is three sections
Fold-line-shaped, the angle between adjacent two sections is b, and permanent magnet opening is towards rotating shaft, and permanent magnet is provided at both ends with air magnet isolation tank；
Cylindrical joined end to end by some sections of different circular arcs in the cross section of the rotor core forms, the circular arc be d-axis side circular arc and
The junction of quadrature axis side circular arc, d-axis side circular arc and quadrature axis side circular arc is provided with angle-shaped groove；The d-axis side circular arc center of circle and rotating shaft
The center of circle overlaps, and d-axis side circular arc is symmetrical on the d-axis of place magnetic pole；The scope that quadrature axis side circular arc corresponds to central angle a is
30 ° -50 °, and quadrature axis side circular arc is symmetrical on the quadrature axis of place magnetic pole；The center of circle O ' of d-axis side circular arc and quadrature axis side circular arc
Center of circle O " between eccentric throw d is set；Radius corresponding to the circular arc of the quadrature axis side is more than radius corresponding to the circular arc of d-axis side.
Preferably, the scope of the eccentric throw d is 5mm-8mm, and the scope of the angle b is 90 ° -180 °, described angular
Groove depth scope is that 0.4mm-0.6mm, opening away from scope are 0.8mm-1.2mm, and the permanent magnet uses Nd-Fe-B permanent magnet material.
The beneficial effect that the present invention is reached：
Permanent magnet of the present invention is three sections of fold-line-shaped structures, and compared to arc-shaped permanent magnet structure, permanent-magnet material usage amount is reduced, had
Effect reduces vibration and the noise of motor operation, reduces cost；The high order that the angle-shaped groove of setting is reduced in air-gap field is humorous
Ripple, air gap flux density and no-load back electromotive force waveform is set to be closer to sine；Meanwhile the amplitude of cogging torque is set effectively to reduce.
Brief description of the drawings
Fig. 1 is existing built-in arcuate permanent magnetic synchronous motor structure schematic diagram；
Fig. 2 is the rotor structure schematic diagram of the present invention：
Fig. 3 is rotor diameter segmentation circular-arc schematic diagram；
Fig. 4 is angle-shaped groove schematic diagram；
Fig. 5 is the enlarged drawing of T parts in Fig. 4；
Fig. 6 is air gap magnetic density waveform figure caused by internal permanent magnet synchronous motor of the present invention；
Fig. 7 is air gap magnetic density waveform figure caused by existing built-in arcuate permanent magnetic synchronous motor；
Fig. 8 is Fourier decomposition (FFT) figure of internal permanent magnet synchronous motor air gap flux density of the present invention；
Fig. 9 is Fourier decomposition (FFT) figure of existing built-in arcuate permanent magnetic synchronous motor air gap flux density；
Figure 10 is the cogging torque oscillogram of internal permanent magnet synchronous motor of the present invention；
Figure 11 is the cogging torque oscillogram of existing built-in arcuate permanent magnetic synchronous motor.
Wherein：1- d-axis side circular arc, 2- quadrature axis side circular arc, 3- angle-shaped grooves, 4- permanent magnets, 5- air magnet isolation tanks, 6- rotors
Iron core, 7- rotating shafts.
Embodiment
Technical scheme is described in detail below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to
This.
Fig. 1 is existing built-in arcuate permanent magnetic synchronous motor structure schematic diagram, and wherein permanent magnet uses circular arc.
Fig. 2 is the Over Electric Motor with PMSM new type rotor structure of the present invention, and the rotor includes：Rotating shaft 7, rotor
Iron core 6, permanent magnet 4, for rotor core 6 in rotating shaft 7, the edge on the surface of rotor core 6 is distributed several permanent magnets
4；The shape of permanent magnet 4 is three sections of fold-line-shapeds, and centre is horizontal segment, and its length takes 18.67mm, and both sides are tilting section, its length
Take 12.62mm, the angle b between adjacent two sections takes 153 °, and permanent magnet 4 is open towards rotating shaft 7；Permanent magnet 4 uses neodymium iron boron
Permanent-magnet material, radial magnetizing, formed air gap magnetic density waveform is comparatively close to sine wave, at the same with it is existing interior
Put arc-shaped permanent magnet to compare, more save permanent-magnet material；At the both ends of permanent magnet 4, air magnet isolation tank 5 is set, to reduce not
With the leakage field between magnetic pole, the utilization ratio of permanent magnet is improved；The cross section of rotor core 6 is cylindrical by some sections of circular arc head and the tail phases
Even form, circular arc is d-axis side circular arc 1 and quadrature axis side circular arc 2；As shown in figure 3, by taking a magnetic pole as an example, d-axis side circular arc 1 with
O ' is the center of circle (center of circle of O ' and rotating shaft 7), using the magnetic pole d-axis as symmetry axis, and quadrature axis side circular arc 2 is the center of circle, with the magnetic with O "
Pole quadrature axis is symmetry axis；The distance between center of circle O ' and O " is eccentric throw d, and the radius corresponding to quadrature axis side circular arc 2 is more than d-axis
Radius corresponding to side circular arc 1, the central angle a corresponding to the embodiment quadrature axis side circular arc 2 is 48 °, and eccentric throw d takes 6mm.
The junction of d-axis side circular arc 1 and quadrature axis side circular arc 2 is provided with angle-shaped groove 3, and the depth bounds of angle-shaped groove 3 is 0.4mm-
0.6mm, opening are 0.8mm-1.2mm away from scope, and the depth and opening of angle-shaped groove 3 are away from being power decision by motor；Such as figure
4th, shown in 5, using the intersection point O of d-axis side circular arc 1 and quadrature axis side circular arc 2 as the center of circle, two concentric circles are made, cylindrical radius is R,
The radius of inner circle is r, cylindrical to be designated as A, C with d-axis side circular arc 1, the intersection point of quadrature axis side circular arc 2, the center of circle O " of quadrature axis side circular arc 2 with
Center of circle O line meets at B with inner circle, and the both sides of angle-shaped groove 3 are line segment AB, BC, and in this embodiment, R takes 1.04mm, r to take
0.55mm, the structure advantageously reduce cogging torque and air-gap field higher hamonic wave.
For motor when carrying out energy conversion, energy is all by the air gap magnetic between stator, rotor in the form of electromagnetic energy
Field is transmitted, and the air-gap field of permagnetic synchronous motor is as caused by permanent magnet, and different permanent magnetism shapes can be formed not
Same air-gap field waveform, new type rotor structure of the present invention use three sections of fold-line-shaped permanent magnets 4 to produce and are more nearly sine
Air gap magnetic density waveform, as shown in fig. 6, Fig. 7 show air gap magnetic density waveform caused by existing built-in arcuate permanent magnetic synchronous motor；
The present invention reduces the harmonic content in air gap flux density using three sections of fold-line-shaped permanent magnets 4, as shown in figure 8, Fig. 9 show it is existing
Built-in arcuate permanent magnetic synchronous motor air gap flux density in harmonic content；Operationally, air gap flux density is specific for permagnetic synchronous motor
Harmonic component can produce the cogging torque of magneto, when the cross section of rotor core 6 it is cylindrical using even air gap structure when, gas
Harmonic content in gap magnetic field is more, and new type rotor structure is in the quadrature axis side of the magnetic pole two kind circles different with the d-axis side Cai You centers of circle
Arc is connected, and angle-shaped groove 3 is opened in junction, forms non-uniform gap with this, further reduces gas in motor operation course
Harmonic content in gap magnetic field, reduce cogging torque, as shown in Figure 10, Figure 11 show the synchronous electricity of existing built-in arcuate permanent magnetic
The cogging torque of machine.
It is described above that the present invention is briefly described, not by above-mentioned working range limit value, as long as taking the present invention
Thinking and method of work carry out simple modification and apply to other equipment, or make and changing in the case where not changing central scope principle of the present invention
Enter and retouch etc. behavior, within protection scope of the present invention.
Claims (9)
1. a kind of Over Electric Motor with PMSM new type rotor structure, including rotating shaft (7), rotor core (6), permanent magnet
(4), for the rotor core (6) in rotating shaft (7), the edge on rotor core (6) surface is distributed several permanent magnets
(4)；It is characterized in that：The permanent magnet (4) is three sections of fold-line-shapeds, and the angle between adjacent two sections is b, permanent magnet (4) opening
Towards rotating shaft (7), and permanent magnet (4) is provided at both ends with air magnet isolation tank (5)；The cross section of the rotor core (6) is cylindrical to be
Joined end to end and formed by some sections of different circular arcs, the circular arc is d-axis side circular arc (1) and quadrature axis side circular arc (2), and d-axis side is justified
The junction of arc (1) and quadrature axis side circular arc (2) is provided with angle-shaped groove (3).
A kind of 2. Over Electric Motor with PMSM new type rotor structure as claimed in claim 1, it is characterised in that：It is described
D-axis side circular arc (1) center of circle overlaps with rotating shaft (7) center of circle, and d-axis side circular arc (1) is symmetrical on the d-axis of place magnetic pole.
A kind of 3. Over Electric Motor with PMSM new type rotor structure as claimed in claim 1, it is characterised in that：It is described
The corresponding central angle a of quadrature axis side circular arc (2) scope is 30 ° -50 °, and quadrature axis pair of the quadrature axis side circular arc (2) on place magnetic pole
Claim.
A kind of 4. Over Electric Motor with PMSM new type rotor structure as claimed in claim 1, it is characterised in that：It is described
Eccentric throw d is set between the center of circle O ' of d-axis side circular arc (1) and the center of circle O " of quadrature axis side circular arc (2).
A kind of 5. Over Electric Motor with PMSM new type rotor structure as claimed in claim 4, it is characterised in that：It is described
Eccentric throw d scope is 5mm-8mm.
A kind of 6. Over Electric Motor with PMSM new type rotor structure as claimed in claim 1, it is characterised in that：It is described
Angle b scope is 90 ° -180 °.
A kind of 7. Over Electric Motor with PMSM new type rotor structure as claimed in claim 1, it is characterised in that：It is described
Radius corresponding to quadrature axis side circular arc (2) is more than radius corresponding to d-axis side circular arc (1).
A kind of 8. Over Electric Motor with PMSM new type rotor structure as claimed in claim 1, it is characterised in that：It is described
Angle-shaped groove (3) depth bounds is 0.4mm-0.6mm, and it is 0.8mm-1.2mm to be open away from scope.
A kind of 9. Over Electric Motor with PMSM new type rotor structure as claimed in claim 1, it is characterised in that：It is described
Permanent magnet (4) uses Nd-Fe-B permanent magnet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822864.5A CN107508397A (en) | 2017-09-13 | 2017-09-13 | A kind of Over Electric Motor with PMSM new type rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822864.5A CN107508397A (en) | 2017-09-13 | 2017-09-13 | A kind of Over Electric Motor with PMSM new type rotor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107508397A true CN107508397A (en) | 2017-12-22 |
Family
ID=60695230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710822864.5A Pending CN107508397A (en) | 2017-09-13 | 2017-09-13 | A kind of Over Electric Motor with PMSM new type rotor structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107508397A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912304A (en) * | 2019-10-25 | 2020-03-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor, motor, compressor and air conditioner |
| CN112366912A (en) * | 2020-10-19 | 2021-02-12 | 江苏大学 | Double-winding low-harmonic design method based on fractional-slot concentrated winding permanent magnet motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997369A (en) * | 2009-08-07 | 2011-03-30 | 日立空调·家用电器株式会社 | Self-starting permanent magnet synchronous motor and compressor and refrigeration cycle using the same |
| CN205647074U (en) * | 2016-03-07 | 2016-10-12 | 广东美芝制冷设备有限公司 | Rotor core , rotor, motor and compressor |
| CN205693464U (en) * | 2016-06-08 | 2016-11-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Core construction, rotor assembly and magneto |
| CN206481197U (en) * | 2017-01-23 | 2017-09-08 | 徐州中矿大传动与自动化有限公司 | Anti- salient pole permanent magnet reluctance motor |
-
2017
- 2017-09-13 CN CN201710822864.5A patent/CN107508397A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997369A (en) * | 2009-08-07 | 2011-03-30 | 日立空调·家用电器株式会社 | Self-starting permanent magnet synchronous motor and compressor and refrigeration cycle using the same |
| CN205647074U (en) * | 2016-03-07 | 2016-10-12 | 广东美芝制冷设备有限公司 | Rotor core , rotor, motor and compressor |
| CN205693464U (en) * | 2016-06-08 | 2016-11-16 | 珠海格力节能环保制冷技术研究中心有限公司 | Core construction, rotor assembly and magneto |
| CN206481197U (en) * | 2017-01-23 | 2017-09-08 | 徐州中矿大传动与自动化有限公司 | Anti- salient pole permanent magnet reluctance motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912304A (en) * | 2019-10-25 | 2020-03-24 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor, motor, compressor and air conditioner |
| CN110912304B (en) * | 2019-10-25 | 2021-11-30 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor, motor, compressor and air conditioner |
| CN112366912A (en) * | 2020-10-19 | 2021-02-12 | 江苏大学 | Double-winding low-harmonic design method based on fractional-slot concentrated winding permanent magnet motor |
| CN112366912B (en) * | 2020-10-19 | 2021-09-10 | 江苏大学 | Double-winding low-harmonic design method based on fractional-slot concentrated winding permanent magnet motor |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171222 |
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