CN107070156B - A kind of attached brushless DC motor of electric vehicle - Google Patents
A kind of attached brushless DC motor of electric vehicle Download PDFInfo
- Publication number
- CN107070156B CN107070156B CN201710315550.6A CN201710315550A CN107070156B CN 107070156 B CN107070156 B CN 107070156B CN 201710315550 A CN201710315550 A CN 201710315550A CN 107070156 B CN107070156 B CN 107070156B
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- stator poles
- excitation
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- slot
- winding
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- 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
A kind of attached brushless DC motor of electric vehicle belongs to vehicle technology field, including stator core, rotor core, excitation winding, permanent magnet, armature winding and axis.It is characterized by: the brshless DC motor is inner rotor core, stator core has the stator poles of 12k convex, and k is positive integer；12k stator poles can be divided into 6k to parallel stator poles, and the center line of two stator poles in a pair of parallel stator poles is parallel to each other；There is armature slot between two stator poles of a pair of parallel stator poles, has excitation slot between adjacent two pairs parallel stator poles；Excitation slot has along the circumferential direction recessed recess in the bottom of slot；It is wound with excitation winding in each pair of parallel stator poles, the armature winding of centralization is wound in each stator poles.Technology excitation winding of the invention is mutually isolated with armature winding, and its back-emf is sine wave, effectively reduces the torque pulsation of traditional magnetic resistance class motor.
Description
Technical field
The present invention relates to a kind of attached brushless DC motor of electric vehicle, belong to vehicle technology field.
Background technique
Currently, non-brush permanent-magnet DC motor replaces the mechanical commutator in brushed DC motor, knot using semiconductor devices
Structure is simple, reliable for operation, and without spark, electromagnetic noise is low, has a wide range of applications on the electric vehicle of middle low power.It is brushless straight
Stream motor stator winding is made into three-phase symmetrical star connection more, and back-emf is mostly square wave, therefore available direct current passes through inverter
It is driven after commutation.
In relevant research, the Chinese invention patent of authorization: the fractional-slot winding of low speed large torque moment permanent-magnet brushless motor
ZL200510093634.7, relates to number of magnetic poles P and iron core slot number Z and number of phases M and distribution number Q meets following condition brushless, permanently
Motor: 1) when distribution number Q be odd number, iron core slot number Z=Q × M × K, number of magnetic poles P=Z ± K；Wherein K is natural number；2) when
When distribution number Q is even number, iron core slot number Z=Q × M × K, number of magnetic poles P=Z ± 2K；Wherein K is natural number.
In addition, in order to reduce the cost of non-brush permanent-magnet DC motor, inventor also proposed a kind of electronic automobile-used low cost
Permanent-magnet brushless DC electric machine (granted patent number: ZL 2015101882812), proposing vacation made of novel convex soft iron
Pole and permanent magnetic steel, which are alternatively arranged, is bonded in rotor core the pole that partners, to reduce the cost of magneto.
Grant number is the patent of invention of ZL2013100794514: each symmetrical four phases dual protruding pole brushless DC electricity of phase inductance
Machine, four phase motors possess four phase stator winding, and the design of this number of phases redundancy is so that four phase motors can be further improved motor
Reliability so that the software and hardware structure of electric vehicle active reconfiguration system after a failure, is not losing performance or is only reducing part
In the case where performance indicator, system is made to realize fault-tolerant operation.The patent proposes 12/9 novel pole structures and each symmetrical
Novel winding configuration mode.Motor (patent of invention CN201120430138.7: one of authorization of this and 8/6 traditional pole structure
Four phase double salient-pole electric machines of kind) there is apparent difference.
On this basis, inventor conducts in-depth research the number of poles and pole embrace of multiphase double salient-pole electric machine,
Deliver that " multiphase Fielding-winding doubly salient generator number of poles is ground with pole embrace " Proceedings of the CSEE " the 7th phase in 2015
Study carefully " academic paper, it is indicated that the ratio between stator poles and rotor number of poles should be m/ (m+1) or m/ (m-1).
As prior art, traditional double salient-pole electric machine has biggish torque pulsation, what Commutation Torque Ripple generated
Principle visible " Proceedings of the CSEE " the 27th phase paper " electric excitation biconvex electrode electric machine based on half-bridge converter in 2011
Orientation optimization control strategy ".With going deep into for research, inventor has found that the technology that early period proposes still has biggish commutation and turns
Square pulsation, therefore be badly in need of studying a kind of lesser electric vehicle motor of Commutation Torque Ripple.
Based on this, the present invention proposes that a kind of motor that back-emf is sine wave to reduce Commutation Torque Ripple, is provided simultaneously with
Polyphase windings are to improve the reliability of system.The ratio between original double salient-pole electric machine number of poles of technological break-through of the invention should be m/ (m+
1) or the technical prejudice that m/ (m-1), therefore creative.
Summary of the invention
The present invention is to solve the problems such as traditional magnetic resistance class motor commutation torque pulsation is big and provide a four phase high reliability
Adjustable magnetic fields motor, the present invention takes following technical scheme:
A kind of attached brushless DC motor of electric vehicle, including stator core, rotor core, excitation winding, permanent magnet, armature winding
And axis, it is characterised in that:
The brshless DC motor is inner rotor core, and rotor core is fixed on axis, has 11k to be evenly distributed in rotor core
Male rotor pole, k is positive integer；
The stator core has the stator poles of 12k convex, and 12k stator poles are divided into 6k to parallel stator poles, Yi Duiping
The center line of two stator poles in row stator poles is parallel to each other；
There is armature slot between two stator poles of a pair of parallel stator poles, has excitation between adjacent two pairs parallel stator poles
Slot, the excitation groove deep are greater than armature slot；
The excitation slot has along the circumferential direction recessed recess in the bottom of slot, i.e., a pair of parallel stator poles root width is small
In extreme width；
Excitation winding is wound in each pair of parallel stator poles, the coiling of adjacent excitation winding is contrary；Excitation winding is located at
The bottom of excitation slot；
The armature winding of centralization is wound in each stator poles, the coiling of adjacent armatures winding is contrary；Armature around
Group is located at the notch of excitation slot and armature slot.
A kind of attached brushless DC motor of electric vehicle as described above, it is characterised in that: two of every a pair of parallel stator poles are fixed
The yoke portion of sub- pole is embedded with the permanent magnet of cutting orientation magnetizing；The magnetizing direction of adjacent permanent magnet is opposite；The permanent magnet is in radial length
Degree is less than the thickness of a pair of parallel stator poles stator yoke.
A kind of attached brushless DC motor of electric vehicle as described above, it is characterised in that: the extremely oblique pole structure of rotor.
A kind of attached brushless DC motor of electric vehicle as described above, it is characterised in that: along the circumferential direction every three adjacent electricity
Pivot windings in series, all 3k armature winding are composed in series a phase armature winding.
According to above technical solution, compared with the existing technology, the present invention has the following beneficial effects:
1. four phase motors have four phase inductances, electromotive force all in sinusoidal variations at any time, it can effectively reduce and change
To torque pulsation；
2. four phase stator winding of double salient-pole electric machine of the invention can be same for traditional three-phase reluctance motor
When work, while two are conducted give other two-phase commutation, have higher fault-tolerant operation ability and reliability；
3. excitation winding and armature winding can be mutually isolated by insulating paper, the propagation of failure is avoided；
4. electrical excitation magnetic linkage and permanent magnet flux linkage path of the invention is each inconsistent, can respectively be self-regulated magnetic field, have very high
Flexibility；
5. permanent magnetism can be with continuous output, in permanent magnetism loss of excitation in the case where there is electrical excitation failure, electrical excitation can also be with
It works on.
It is noted that number of poles of the invention is not the On The Choice in a finite value, but tradition is set
A kind of breakthrough that meter theory is confined, overcomes the technology prejudice in terms of traditional double salient-pole electric machine number of poles.
Detailed description of the invention
Fig. 1 is a kind of attached brushless DC motor of electric vehicle structural schematic diagram of the present invention；Wherein: 1, stator core；2, rotor iron
The heart；3, axis；4, armature winding；5, excitation winding；6, permanent magnet.
Fig. 2 is a kind of attached brushless DC motor of electric vehicle magnetizing direction schematic diagram of the present invention；Wherein: 1, stator core；2, turn
Sub- iron core；3, axis；4, armature winding；5, excitation winding；6, permanent magnet.
Fig. 3 is a kind of each coil vector star graph of attached brushless DC motor of electric vehicle.
Fig. 4 is a kind of each phase winding vector star graph of attached brushless DC motor of electric vehicle.
Fig. 5 is a kind of four phase induced potential figure of attached brushless DC motor of electric vehicle.
Specific embodiment
Attached drawing discloses the structural schematic diagram of preferred embodiment involved in the present invention without limitation；Below with reference to attached drawing
Explain technical solution of the present invention in detail.
Fig. 1 is a kind of attached brushless DC motor of electric vehicle structural schematic diagram of the present invention.The attached brushless DC motor of electric vehicle packet
Stator core (1), rotor core (2), excitation winding (5), permanent magnet (6), armature winding (4) and axis (3) are included, is internal rotor knot
Structure, rotor core (2) are fixed on axis (3), have 11k uniformly distributed male rotor poles in rotor core (2), k is positive integer.?
In the present embodiment, k=1.
The stator core (1) has the stator poles of 12k convex, and 12k stator poles are divided into 6k to parallel stator poles, a pair
The center line of two stator poles in parallel stator poles is parallel to each other.
There is armature slot between two stator poles of a pair of parallel stator poles, has excitation between adjacent two pairs parallel stator poles
Slot, the excitation groove deep are greater than armature slot.The excitation slot has along the circumferential direction recessed recess in the bottom of slot, i.e., a pair of
Parallel stator poles root width is less than extreme width.Excitation winding (5), adjacent excitation winding are wound in each pair of parallel stator poles
(5) coiling is contrary；Excitation winding (5) is located at the bottom of excitation slot.The armature of centralization is wound in each stator poles
Winding (4), the coiling of adjacent armatures winding are contrary；Armature winding (4) is located at the notch of excitation slot and armature slot.
The extremely oblique pole structure of rotor.
Fig. 2 is a kind of attached brushless DC motor of electric vehicle magnetizing direction schematic diagram of the present invention, the two of every a pair of parallel stator poles
The yoke portion of a stator poles is embedded with the permanent magnet (6) of cutting orientation magnetizing；The magnetizing direction of adjacent permanent magnet (6) is opposite；The permanent magnet
(6) it is less than the thickness of a pair of parallel stator poles stator yoke in radial length.
Fig. 3 is a kind of each coil vector star graph of attached brushless DC motor of electric vehicle.Fig. 4 is a kind of electric vehicle brushless direct current
Each phase winding vector star graph of machine.Along the circumferential direction every three adjacent armature winding (4) series connection, all 3k armature winding
(4) it is composed in series a phase armature winding (4).
Fig. 5 is a kind of four phase induced potential figure of attached brushless DC motor of electric vehicle.It can be seen that each phase winding is apart from one another by 90 °
Electrical angle, and each phase induced potential is in sinusoidal.
Its working principle is that:
When aliving on this motor excitation winding (5) or permanent magnet (6) magnetizes, can be set up inside motor at this time
Stator yoke Jing Guo each phase, stator teeth, air-gap, rotor teeth portion, rotor yoke are formed closure by the magnetic flux in magnetic field, generation
Circuit.
Motor not only can be used as generator operation, but also can be used as motor running, when motor is with motor-operation
When the position signal that can be detected according to sensor, converter is controlled using controller.When certain phase stator poles and turn
When sub- pole is engaged, forward current is mutually passed to this；When certain phase stator poles and rotor pole are detached from, negative current is mutually passed to this,
Motor can external output torque.
Pass through a kind of each coil vector star graph of attached brushless DC motor of electric vehicle shown in Fig. 3, it can be seen that each phase of motor
Back-emf apart from one another by 90 ° of electrical angles, and any one phase of this motor can complete period ON operation, i.e. this motor can be with four
Be powered operation when identical, therefore fault-tolerant ability with higher.
When electric power generation is run, prime mover drives this motor to rotate in certain direction, the magnetic of four phase armature winding (4) linkages
Chain changes as rotor-position changes, to generate the induced potential of four phase alternations.When it is as dc generator, with outer
Converter or rectifier bridge the rectification DC power output connect supplies various electrical loads or charges to battery.
Claims (2)
1. a kind of attached brushless DC motor of electric vehicle, including stator core, rotor core, excitation winding, permanent magnet, armature winding and
Axis, it is characterised in that:
The brshless DC motor is inner rotor core, and rotor core is fixed on axis, have in rotor core 11k it is uniformly distributed convex
Shape rotor pole, k are positive integer；
The stator core has the stator poles of 12k convex, and 12k stator poles are divided into 6k to parallel stator poles, and a pair is parallel fixed
Son extremely on two stator poles center line it is parallel to each other；
There is armature slot between two stator poles of a pair of parallel stator poles, has excitation slot, institute between adjacent two pairs parallel stator poles
Excitation groove deep is stated greater than armature slot；
The excitation slot has along the circumferential direction recessed recess in the bottom of slot, i.e., a pair of parallel stator poles root width is less than pole
The width at end；
Excitation winding is wound in each pair of parallel stator poles, the coiling of adjacent excitation winding is contrary；Excitation winding is located at excitation
The bottom of slot；
The armature winding of centralization is wound in each stator poles, the coiling of adjacent armatures winding is contrary；Armature winding position
In the notch of excitation slot and armature slot；
The yoke portion of two stator poles of every a pair of parallel stator poles is embedded with the permanent magnet of cutting orientation magnetizing；The side of magnetizing of adjacent permanent magnet
To opposite；The permanent magnet is less than the thickness of a pair of parallel stator poles stator yoke in radial length；
Along the circumferential direction every three adjacent armature winding series connection, all 3k armature winding are composed in series a phase armature winding.
2. a kind of attached brushless DC motor of electric vehicle as described in claim 1, it is characterised in that: the extremely oblique pole structure of rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710315550.6A CN107070156B (en) | 2017-05-08 | 2017-05-08 | A kind of attached brushless DC motor of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710315550.6A CN107070156B (en) | 2017-05-08 | 2017-05-08 | A kind of attached brushless DC motor of electric vehicle |
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| Publication Number | Publication Date |
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| CN107070156A CN107070156A (en) | 2017-08-18 |
| CN107070156B true CN107070156B (en) | 2019-04-30 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109067030B (en) * | 2018-09-20 | 2021-01-05 | 山东理工大学 | Stator iron core of permanent magnet motor of electric automobile stator |
| CN110277889B (en) * | 2019-05-28 | 2021-11-02 | 安徽大学 | Stator permanent magnet type rotary transformer |
| CN110492666A (en) * | 2019-09-20 | 2019-11-22 | 哈尔滨工业大学 | Stator excitation flywheel pulse reluctance generator system |
| CN113178962B (en) * | 2021-05-20 | 2023-02-24 | 河北工业大学 | Modularized rotor hybrid excitation magnetic flux reverse motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2731815Y (en) * | 2004-10-10 | 2005-10-05 | 东南大学 | Wide speed regulating, double salient pole mixed exciting brushless dynamo |
| CN101291095B (en) * | 2008-06-12 | 2011-03-30 | 哈尔滨工业大学 | Hybrid switch reluctance motor |
| CN101610007B (en) * | 2009-07-15 | 2011-08-10 | 南京航空航天大学 | 3-phase 12/11 pole permanent-magnetic-switch flux linkage motor and method for inhibiting short circuit current thereof |
| CN103580418A (en) * | 2012-07-30 | 2014-02-12 | 英泰集团有限公司 | Range-extending electric generator structure for range-extending type electric automobile |
| CN103187846B (en) * | 2013-03-13 | 2015-04-22 | 南京航空航天大学 | Four-phase and double-salient brushless direct current motor with symmetrical phase inductances |
| CN104218763B (en) * | 2014-07-08 | 2017-04-12 | 哈尔滨工业大学 | Multi-phase reluctance machine |
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Effective date of registration: 20210202 Address after: 214500 Jiangzhou Road, Jingjiang Economic Development Zone, Taizhou City, Jiangsu Province Patentee after: JIANGSU HUANSHENG MOTOR Co.,Ltd. Address before: 255090 NO.201 shuxiangjingyuan, Mashang Town, Zhangdian District, Zibo City, Shandong Province Patentee before: Shi Liwei |