CN109904959A - A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic - Google Patents
A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic Download PDFInfo
- Publication number
- CN109904959A CN109904959A CN201910273422.9A CN201910273422A CN109904959A CN 109904959 A CN109904959 A CN 109904959A CN 201910273422 A CN201910273422 A CN 201910273422A CN 109904959 A CN109904959 A CN 109904959A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- motor
- weak magnetic
- rotor
- synchronous motor
- 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
Links
Abstract
The invention discloses a kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic, the rotor includes rotor core, is embedded in multiple permanent magnets, the multiple magnet isolation tanks being arranged circumferentially in iron core and along iron core；In permanent magnet two sides, magnet isolation tank runs through rotor core for the magnet isolation tank setting.The present invention only by rotating permanent magnet, changes motor gas-gap flux density, weakens motor gas-gap magnetic field, motor weak magnetic can be realized by the way that rotatable cylindrical permanent magnet is arranged；Complicated weak magnetic control algolithm is avoided, motor control difficulty is reduced；Consumption electric current weakened field is not needed, is conducive to improve electric efficiency.
Description
Technical field
The present invention relates to technical field of motors, especially a kind of permanent magnet synchronous motor for new energy automobile convenient for weak magnetic turns
Son.
Background technique
Permanent magnet synchronous motor is because its power density is high, torque rotary speed characteristic is good, and in reliability, low noise, low vibration
Etc. clear superiority, be widely used in electric car field etc..Automobile motor requires permanent in vehicle low speed
Torque output meets automobile quick start, acceleration, load climbing etc. and requires；Firm power is exported in high speed, meets automobile height
Fast traveling demand.The back-emf of permanent magnet synchronous motor increases with the increase of motor speed, when base speed is following, voltage and defeated
Power is linearly increasing with the increase of speed out, and when motor speed reaches base speed, the back-emf of permanent magnet synchronous motor reaches inverse
Become device maximum voltage.By inverter capacity limit, if motor needs continue to increase speed, it is more than that base speed is run, then needs to adopt
It is controlled with weak magnetic.The method of weak magnetic control at present is to reach inverter maximum voltage, portion of electrical current in control winding in back-emf
Opposing magnetic field is generated, air-gap field intensity is weakened, so that motor speed be made to continue growing, output power and voltage are constant at this time,
But output torque increases with speed and is declined.When using current field weakening control method, needs to consume partial winding current, cause
The reduction of electric efficiency increases electrical source consumption, while weak magnetic control needs complicated control algolithm of arranging in pairs or groups.
Summary of the invention
The purpose of the present invention is to provide a kind of permanent magnet synchronous motor for new energy automobile rotors convenient for weak magnetic, to realize
It is not required to additionally consume electric current, is realized only by permanent magnet and weaken air-gap field, reach weak magnetic control effect, meet motor high speed
The demand of operation.
The technical solution for realizing the aim of the invention is as follows:
A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic, the rotor include rotor core, insertion
Multiple permanent magnets, the multiple magnet isolation tanks being arranged circumferentially in iron core and along iron core；The magnet isolation tank is arranged in permanent magnet two sides,
Magnet isolation tank runs through rotor core.
Compared with prior art, the present invention its remarkable advantage is:
(1) present invention is by being arranged rotatable cylindrical permanent magnet, only by rotating permanent magnet, i.e., changeable motor
Air gap flux density weakens motor gas-gap magnetic field, motor weak magnetic can be realized.
(2) present invention is by being arranged rotatable cylindrical permanent magnet, it is only necessary to which rotating permanent magnet can weaken motor gas
Gap magnetic field avoids complicated weak magnetic control algolithm, reduces motor control difficulty.
(3) present invention is by being arranged rotatable cylindrical permanent magnet, it is only necessary to which rotating permanent magnet can weaken motor gas
Gap magnetic field does not need consumption electric current weakened field, is conducive to improve electric efficiency.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 be permanent-magnetic synchronous motor rotor of the present invention in axial direction on structural schematic diagram.
Fig. 2 is permanent magnetism body position and the magnetic line of force polar plot when permanent magnet 3 rotates 0 °.
Fig. 3 is permanent magnetism body position and the magnetic line of force polar plot when permanent magnet 3 rotates 30 °.
Motor gas-gap magnetic flux density waveforms figure when Fig. 4 is permanent magnet change in location.
Specific embodiment
In order to illustrate technical solution of the present invention and technical purpose, with reference to the accompanying drawing and specific embodiment is the present invention
It is further to introduce.
In conjunction with Fig. 1, a kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic of the invention, the rotor 1
Including multiple permanent magnets 3, the multiple magnet isolation tanks 4 being arranged circumferentially in rotor core 2, insertion iron core and along iron core；Described turn
Sub 1 center is equipped with through-hole 5.
Further, the permanent magnet 3 is cylinder, can be rotated along its axle center, to adjust magneto air gap magnetic
Close size realizes weak magnetic control convenient for motor.
Further, the setting of magnet isolation tank 4 is in 3 two sides of permanent magnet, and magnet isolation tank 4 runs through rotor core, due to magnet isolation tank 4
Interior to be full of air, the magnetic resistance of air is far longer than the magnetic resistance of iron core, and the magnetic flux that permanent magnet 3 can be hindered to generate passes through magnet isolation tank 4,
So that most of permanent magnet magnetic flux enters the magnetic field interaction of air gap and winding generation with output torque.
A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic of the invention, further, the rotor
Iron core 2 is made of permeability magnetic material.Rotor core 2 is generally suppressed by silicon steel sheet, and silicon steel sheet has biggish magnetic conductivity, described
Permanent magnet 3 is made of permanent-magnet material.2 magnetic conductivity of rotor core is very high, entire to turn when permanent magnet 3 is plugged into rotor core 2
Son 1 can be considered as the magnet that can generate magnetic field.When motor is passed through three-phase alternating current, motor stator generates rotating excitation field, is turning
In sub 1 rotary course, induction forms counter electromotive force in stator winding, and back-emf value should be less than motor inverter voltage value.Instead
The size motor gas-gap magnetic field strength of potential, motor speed etc. are related.When the magnetic field caused by stator and rotor 1 is constant,
Permanent magnet synchronous motor revolving speed is higher, and the back-emf formed in stator winding is bigger, and permanent magnet synchronous motor revolving speed is lower, stator winding
The back-emf of middle formation is smaller.When the back-emf formed in stator winding is equal to motor inverter voltage value, permanent magnet 3 is instantaneous
Needle rotation is 0-90 ° by stepping in synchronization motor or steering engine control 3 rotation angle range of permanent magnet.After permanent magnet rotation, permanent magnetism
Rotor magnetic flux reduces, and weakens air-gap field intensity, so that the back-emf in stator winding reduces, so as to so that motor turns
Speed improves.Permanent magnet rotation angle is bigger, and the revolving speed that motor may be implemented is higher.
In conjunction with Fig. 2,0 ° of position view is rotated for the permanent magnet 3, the magnetic flux that permanent magnet improves at this time is as shown in the figure.
All magnetic fluxs and motor stator winding rotating magnetic flux that permanent magnet provides at this time all couple, and motor gas-gap magnetic field strength is most at this time
Greatly, the maximum speed that motor can reach is minimum.
In conjunction with Fig. 3, magnetic line of force polar plot when rotating 30 ° for the permanent magnet 3, the magnetic flux and motor that permanent magnet provides at this time
Stator winding rotary magnetic is connected with 30 ° of angles, and motor gas-gap magnetic field strength reduces at this time, and the revolving speed that motor can achieve improves.
Referring to Fig. 4, it is in permanent magnet synchronous motor operational process, when cylindrical permanent magnet 3 rotates 0 ° and 90 °, inventor institute
The motor maximum speed and time T relationship figure obtained.Wherein, it is resulting when dotted line indicates that the cylindrical permanent magnet 3 is rotated by 90 °
Motor maximum speed；When solid line indicates that the cylindrical permanent magnet 3 rotates 0 °, resulting motor maximum speed.Permanent magnet rotation
When different angle, motor maximum speed is different, improves the weak magnetism speed expansion ability of motor.
Claims (4)
1. a kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic, which is characterized in that the rotor includes rotor
Multiple permanent magnets (3), the multiple magnet isolation tanks (4) being arranged circumferentially in iron core (2), insertion iron core and along iron core；It is described every magnetic
Slot (4) setting runs through rotor core (2) in permanent magnet (3) two sides, magnet isolation tank (4).
2. the permanent magnet synchronous motor for new energy automobile rotor according to claim 1 convenient for weak magnetic, which is characterized in that institute
Stating permanent magnet (3) is cylinder, can axial-rotation.
3. the permanent magnet synchronous motor for new energy automobile rotor according to claim 1 convenient for weak magnetic, which is characterized in that institute
Stating permanent magnet (4) rotation angle range is 0-90 °.
4. the permanent magnet synchronous motor for new energy automobile rotor according to claim 1 convenient for weak magnetic, which is characterized in that institute
Rotor core (2) is stated to be suppressed by silicon steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273422.9A CN109904959A (en) | 2019-04-05 | 2019-04-05 | A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910273422.9A CN109904959A (en) | 2019-04-05 | 2019-04-05 | A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109904959A true CN109904959A (en) | 2019-06-18 |
Family
ID=66954395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910273422.9A Pending CN109904959A (en) | 2019-04-05 | 2019-04-05 | A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109904959A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752686A (en) * | 2019-10-10 | 2020-02-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor subassembly and have its motor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB495813A (en) * | 1936-05-27 | 1938-11-21 | Jakob Bohli | Magneto electric machines |
| EP2148407A1 (en) * | 2008-07-25 | 2010-01-27 | Voith Patent GmbH | Permanent magnet synchronous machine |
| US8952587B2 (en) * | 2009-10-30 | 2015-02-10 | Louis J. Finkle | Windmill generator with mechanically tuneable permanent magnetic field |
| CN105914984A (en) * | 2016-05-05 | 2016-08-31 | 华中科技大学 | Various magnetic flux-strong magnetic type permanent magnet synchronous motor |
| CN108768019A (en) * | 2016-06-27 | 2018-11-06 | 长泰县爱菲社机械科技有限公司 | A kind of rotor |
| WO2019001623A1 (en) * | 2017-06-27 | 2019-01-03 | Schaeffler Technologies AG & Co. KG | Permanent magnet energized motor with rotatable bar magnets |
| CN109274186A (en) * | 2017-07-17 | 2019-01-25 | 舍弗勒技术股份两合公司 | The rotor and permanent magnet synchronous motor of permanent magnet synchronous motor |
-
2019
- 2019-04-05 CN CN201910273422.9A patent/CN109904959A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB495813A (en) * | 1936-05-27 | 1938-11-21 | Jakob Bohli | Magneto electric machines |
| EP2148407A1 (en) * | 2008-07-25 | 2010-01-27 | Voith Patent GmbH | Permanent magnet synchronous machine |
| US8952587B2 (en) * | 2009-10-30 | 2015-02-10 | Louis J. Finkle | Windmill generator with mechanically tuneable permanent magnetic field |
| CN105914984A (en) * | 2016-05-05 | 2016-08-31 | 华中科技大学 | Various magnetic flux-strong magnetic type permanent magnet synchronous motor |
| CN108768019A (en) * | 2016-06-27 | 2018-11-06 | 长泰县爱菲社机械科技有限公司 | A kind of rotor |
| WO2019001623A1 (en) * | 2017-06-27 | 2019-01-03 | Schaeffler Technologies AG & Co. KG | Permanent magnet energized motor with rotatable bar magnets |
| CN109274186A (en) * | 2017-07-17 | 2019-01-25 | 舍弗勒技术股份两合公司 | The rotor and permanent magnet synchronous motor of permanent magnet synchronous motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110752686A (en) * | 2019-10-10 | 2020-02-04 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotor subassembly and have its motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5723524B2 (en) | Rotating electric machines and electric vehicles | |
| CN101325349B (en) | Permanent magnetism type motor of wide speed-adjusting magnetic flux memory type stator | |
| Li et al. | Comparative study of consequent-pole and hybrid-pole permanent magnet machines | |
| JP2010246196A (en) | Rotary electric machine | |
| CN103199662B (en) | The composite excitation permanent magnet synchronous motor of third harmonic excitation | |
| CN101552497A (en) | A mixed excitation biconvex pole motor T | |
| CN103715853A (en) | Bearingless doubly-salient permanent-magnet switched reluctance motor with axial and radial hybrid excitation | |
| Wang et al. | A new hybrid excitation permanent magnet machine with an independent AC excitation port | |
| CN108336837A (en) | A kind of composite excitation direct driving motor | |
| CN106655560B (en) | Stator permanent magnet motor | |
| JP2015070767A (en) | Lateral magnetic flux dynamo-electric machine, and vehicle | |
| CN102005835A (en) | Halbach outer rotor doubly salient motor | |
| CN110838779B (en) | Mixed excitation wound rotor and mixed excitation wound synchronous motor | |
| CN104467333A (en) | Rotor excitation multi-phase reluctance motor and control method thereof | |
| CN109004806A (en) | A kind of machinery magnetism-regulating type permanent magnet synchronous electric thermomechanical components | |
| CN108347113A (en) | A kind of permanent magnetic brushless of bilayer combination magnetic pole | |
| Sakai et al. | Realizing high efficiency using pole-changing hybrid permanent magnet motors | |
| CN201188577Y (en) | Single-phase reluctance generator | |
| CN109067024A (en) | A kind of big torque micro-vibration magnetic suspension switched reluctance motor | |
| JP6480651B2 (en) | Permanent magnet type rotating electrical machine drive system | |
| CN109904959A (en) | A kind of permanent magnet synchronous motor for new energy automobile rotor convenient for weak magnetic | |
| CN208479439U (en) | A kind of machinery magnetism-regulating type permanent magnet synchronous electric thermomechanical components | |
| CN103904855A (en) | Brushless harmonic excitation motor with initial self-starting capacity | |
| Lu et al. | Design and analysis of a hybrid permanent magnet variable-flux flux-intensifying machine | |
| CN100502205C (en) | Electromagnetic permanent magnet electric machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190618 |
|
| RJ01 | Rejection of invention patent application after publication |