CN202276210U - Rotor structure of wide speed range permanent magnet motor - Google Patents
Rotor structure of wide speed range permanent magnet motor Download PDFInfo
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- CN202276210U CN202276210U CN2011203775583U CN201120377558U CN202276210U CN 202276210 U CN202276210 U CN 202276210U CN 2011203775583 U CN2011203775583 U CN 2011203775583U CN 201120377558 U CN201120377558 U CN 201120377558U CN 202276210 U CN202276210 U CN 202276210U
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- permanent magnet
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Abstract
The utility model relates to a rotor structure of a wide speed range permanent magnet motor. A permanent magnet is composed of a plurality of permanent magnet blocks which are same in thickness and length and are linearly arranged. An even number of the permanent magnets are arranged in symmetry. The permanent magnets having the same polarity are arranged in to a V shape. The two ends of each permanent magnet block are magnetism isolating grids. A magnetic conductive bridge is arranged between two permanent magnet blocks. The permanent magnet is in a segmented submerged structure. A plurality of permanent magnet blocks of the permanent magnet is consistent in magnetic line direction. The above structure not only maintains the advantages of high efficiency and high power density of a conventional embedded permanent magnet brushless motor, but also greatly widens the constant power operation scope of the motor through utilizing the inherent flux-weakening capacity of the segmented submerged permanent magnet structure, so the demagnetization, the magnetic property decrease, and other problems of a permanent magnet material are effectively solved.
Description
Technical field
The utility model relates to a kind of drive motors, especially a kind of rotor of permanent magnetic brushless.
Background technology
Drive motors is as one of critical component of mixed power electric car drive system, and the quality of its performance directly affects the vehicle performance of mixed power electric car.As one type of brushless electric machine, permanent magnetic brushless is owing to adopt permanent magnet excitation to produce air-gap field, and the remarkable advantage that therefore has high efficiency, high power density has obtained using widely at present in mixed power electric car.
Generally speaking, different in epitrochanterian position according to permanent magnet, the rotor magnetic circuit structural of permanent magnetic brushless generally is divided into surface-adhered type and embedded two kinds.Compare with the surface-adhered type structure, permanent magnet embedded rotor structure can prevent that permanent magnet from flying out because of the centrifugal force of high speed rotating, has therefore improved the mechanical strength of rotor, makes the type motor be fit to high-speed cruising more.What is more important, the introducing of protruding machine structure of rotor and permanent magnet pole shoe, making has increased reluctance torque in the electromagnetic torque of embedded magneto, has improved its power density, has improved its weak-magnetic speed-regulating ability, has widened its output-constant operation scope.
But; The weak magnetism speed expansion means that at present existing conventional embedded permanent magnetic brushless is adopted; Be through the d-axis stator current that applies negative sense and realize directly to overcome magnetic field of permanent magnet; Its direct result is the irreversible demagnetization that causes permanent magnet easily, has reduced the stability and the reliability of drive system.Therefore, develop be suitable for the mixed power electric car high-speed cruising, reliable and stable, control is convenient and the good Hybrid Electric Vehicle Drive Motor of dynamic property, becomes one of mixed power electric car drive system hot research fields.
The utility model content
The purpose of the utility model is to avoid the deficiency of prior art and a kind of wide range speed control rotor structure for permanent magnet motor is provided.
The technical scheme that the utility model adopted is: a kind of wide range speed control rotor structure for permanent magnet motor; Comprise permanent magnet, magnetic conduction bridge, armature spindle, rotor core, separated magnetic grid; Permanent magnet is made up of polylith thickness and the identical permanent magnet blocks of length; Permanent magnet blocks is along linear array, and permanent magnet is an even number, symmetric arrays; The V-shaped arrangement of the permanent magnet of same polarity, the two ends of permanent magnet blocks are at a distance from magnetic grid; It between two permanent magnet blocks magnetic conduction bridge.Permanent magnet is a segmentation submersible structure.A plurality of permanent magnet blocks magnetic line of force directions of permanent magnet are consistent.
The best-of-breed technology scheme that the utility model adopted is: permanent magnet is generally eight, is divided into four groups of symmetric arrays, and every group is interior V-arrangement, is that outer V-arrangement is arranged between group and the group.
The operation principle of the utility model is: when the motor open circuit operation, armature supply is 0, and the air-gap field of this moment only has the rotor permanent magnetic field to set up.Because the effect of adjacent permanent magnet leakage field, the magnetic conduction bridge is in saturation condition.(base speed when the motor weak magnetism speed expansion moves
V b More than), on the one hand, because the magnetic permeability of permanent magnet is approximately equal to the magnetic permeability of air, stator d-axis demagnetizing current
i d With making the degree of saturation of magnetic conduction bridge 2 reduce demagnetizing current
i d Big more, the degree of saturation of magnetic conduction bridge 2 is low more, causes magnetic conduction bridge 2 to withdraw from the saturation region, and promptly the magnetic conduction bridge of this moment is an armature supply
i d The demagnetizing field that is produced provides magnetic circuit, has reduced the magnetic flux density of air gap resultant magnetic field, has obtained weak magnetic effect; On the other hand; The reduction of magnetic conduction bridge saturation will make a part of magnetic flux in the permanent magnetic field that permanent magnet provides form the closed-loop path through the magnetic conduction bridge again; Therefore; The permanent magnetic field that permanent magnet provides passes through air gap and must reduce with the permanent magnetism magnetic linkage of stator winding linkage, has also promptly further strengthened weak magnetic effect, thereby has widened the output-constant operation scope of motor.
Compared with prior art; The utility model has the advantages that: the weak magnetic mechanism of the wide range speed control rotor structure for permanent magnet motor that the utility model proposed has the different of essence with conventional embedded magneto weak magnetism speed expansion; During the embedded permanent magnetic brushless weak magnetic field operation of concentrated magnetic segmentation that Here it is; The working point of permanent magnet does not reduce, but forms the closed-loop path through the unsaturated magnetic conduction bridge that demagnetizing field produced, and exists with the form of leakage field.This structure has not only kept high, the power density advantages of higher of traditional embedded permanent-magnet brushless electric efficiency; And the segmentation submersible magnet structure that is adopted intrinsic weak magnetic energy power; Widen the output-constant operation scope of motor greatly, can improve degradation problem under permanent magnetic material demagnetization, the magnetic property effectively.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Among the figure: 1 is permanent magnet, and 2 is the magnetic conduction bridge, and 3 is armature spindle, and 4 are rotor core, and 5 is at a distance from magnetic grid, and 6 is the weak magnetic-path in d-axis magnetic field, and 7 is the magnetic line of force, and 8 is permanent magnet blocks, and 9 is set of permanent magnets.
Embodiment
A kind of wide range speed control rotor structure for permanent magnet motor; Comprise permanent magnet 1, magnetic conduction bridge 2, armature spindle 3, rotor core 4, separated magnetic grid 5, permanent magnet 1 is made up of polylith thickness and the identical permanent magnet blocks 8 of length, and permanent magnet blocks 8 is along linear array; Permanent magnet 1 is an even number, symmetric arrays; The permanent magnet 1 V-shaped arrangement of same polarity, the two ends of permanent magnet blocks 8 are at a distance from magnetic grid 5; Be magnetic conduction bridge 2 between two permanent magnet blocks 8.Permanent magnet 1 is segmentation submersible structure.A plurality of permanent magnet blocks 8 magnetic line of force directions of permanent magnet 1 are consistent.
With the embedded permanent magnetic brushless speed regulation process of proposed concentrated magnetic segmentation is that example is analyzed.Normal speed with the motor operation
V b Be reference speed, be divided into two kinds of operating conditions and discuss:
(1) runs on base speed when motor
V b When following, motor runs on permanent torque operational mode, need not to carry out weak magnetic control system, can adopt
i d =0 vector control strategy.At this moment, the back-emf of motor
eWith armature supply
iSame-phase makes the motor unity power factor move, and therefore, drive system can obtain higher efficient.
(2) run on base speed when motor
V b When above, motor runs on the output-constant operation pattern.At this moment, need apply the d-axis demagnetizing current of negative sense
i d Carry out weak magnetic control system.The d-axis demagnetizing current
i d With making the degree of saturation of magnetic conduction bridge 2 reduce, magnetic conduction bridge 2 will withdraw from the saturation region, simultaneously; The reduction of magnetic conduction bridge saturation makes a part of magnetic flux in the permanent magnetic field that permanent magnet provides through magnetic conduction bridge 2 formation closed-loop paths again; Therefore, the permanent magnetic field that permanent magnet provides passes through air gap and must reduce with the permanent magnetism magnetic linkage of stator winding linkage, has also promptly further strengthened weak magnetic effect; Thereby widened the output-constant operation scope of motor, realized the output-constant operation pattern of motor.
Claims (4)
1. wide range speed control rotor structure for permanent magnet motor; Comprise permanent magnet, magnetic conduction bridge, armature spindle, rotor core, separated magnetic grid, it is characterized in that: permanent magnet is made up of polylith thickness and the identical permanent magnet blocks of length, and permanent magnet blocks is along linear array; Permanent magnet is an even number, symmetric arrays; The V-shaped arrangement of the permanent magnet of same polarity; The two ends of permanent magnet blocks are at a distance from magnetic grid; It between two permanent magnet blocks magnetic conduction bridge.
2. a kind of wide range speed control rotor structure for permanent magnet motor according to claim 1 is characterized in that permanent magnet is a segmentation submersible structure, is embedded in the rotor core.
3. a kind of wide range speed control rotor structure for permanent magnet motor according to claim 1 is characterized in that a plurality of permanent magnet blocks magnetic line of force directions of permanent magnet are consistent.
4. a kind of wide range speed control rotor structure for permanent magnet motor according to claim 1 is characterized in that permanent magnet is generally eight, is divided into four groups of symmetric arrays, and every group is interior V-arrangement, is that outer V-arrangement is arranged between group and the group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203775583U CN202276210U (en) | 2011-10-09 | 2011-10-09 | Rotor structure of wide speed range permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203775583U CN202276210U (en) | 2011-10-09 | 2011-10-09 | Rotor structure of wide speed range permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202276210U true CN202276210U (en) | 2012-06-13 |
Family
ID=46196547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203775583U Expired - Fee Related CN202276210U (en) | 2011-10-09 | 2011-10-09 | Rotor structure of wide speed range permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202276210U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956843A (en) * | 2014-05-12 | 2014-07-30 | 西北工业大学 | Built-in permanent magnet synchronous motor used for high-speed electric spindle |
| CN105743251A (en) * | 2016-04-25 | 2016-07-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor punching plate and permanent magnet motor |
| CN108418374A (en) * | 2018-02-09 | 2018-08-17 | 郑州轻工业学院 | A grid-shaped field-weakening speed-regulating permanent magnet synchronous motor structure |
| CN108448767A (en) * | 2018-05-11 | 2018-08-24 | 哈尔滨理工大学 | A permanent magnet synchronous motor with a new rotor structure |
| CN109951038A (en) * | 2019-03-05 | 2019-06-28 | 南京航空航天大学 | Bilateral excitation type tangential magnet steel hybrid excitation brushless motor |
-
2011
- 2011-10-09 CN CN2011203775583U patent/CN202276210U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956843A (en) * | 2014-05-12 | 2014-07-30 | 西北工业大学 | Built-in permanent magnet synchronous motor used for high-speed electric spindle |
| CN103956843B (en) * | 2014-05-12 | 2016-08-24 | 西北工业大学 | A kind of high-speed electric main shaft internal permanent magnet synchronous motor |
| CN105743251A (en) * | 2016-04-25 | 2016-07-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor punching plate and permanent magnet motor |
| CN105743251B (en) * | 2016-04-25 | 2018-08-10 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of rotor punching and magneto |
| CN108418374A (en) * | 2018-02-09 | 2018-08-17 | 郑州轻工业学院 | A grid-shaped field-weakening speed-regulating permanent magnet synchronous motor structure |
| CN108418374B (en) * | 2018-02-09 | 2019-07-05 | 郑州轻工业学院 | A grid-shaped field weakening speed-regulating permanent magnet synchronous motor structure |
| CN108448767A (en) * | 2018-05-11 | 2018-08-24 | 哈尔滨理工大学 | A permanent magnet synchronous motor with a new rotor structure |
| CN109951038A (en) * | 2019-03-05 | 2019-06-28 | 南京航空航天大学 | Bilateral excitation type tangential magnet steel hybrid excitation brushless motor |
| CN109951038B (en) * | 2019-03-05 | 2020-07-24 | 南京航空航天大学 | Bilateral excitation type tangential magnet steel hybrid excitation brushless motor |
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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 |
Granted publication date: 20120613 Termination date: 20171009 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |