CN203522474U - Three-phase asynchronous motor redundant winding structure used for electric vehicle - Google Patents
Three-phase asynchronous motor redundant winding structure used for electric vehicle Download PDFInfo
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- CN203522474U CN203522474U CN201320535225.8U CN201320535225U CN203522474U CN 203522474 U CN203522474 U CN 203522474U CN 201320535225 U CN201320535225 U CN 201320535225U CN 203522474 U CN203522474 U CN 203522474U
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- winding
- electric vehicle
- phase
- asynchronous motor
- phase asynchronous
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- 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 utility model discloses a three-phase asynchronous motor redundant winding structure used for an electric vehicle. The structure comprises two sets of stator windings, and the two sets of stator windings are staggered by an [alpha] electrical angle. The three-phase asynchronous motor redundant winding structure solves problems that an existing single winding structure three-phase asynchronous motor for the electric vehicle is low in power factor, low in operation efficiency, and poor in system reliability. When a phase of one set of the winding or more phases of stator windings are open, or open-circuit fault occurs to one or more bridge wall of an inverter, the structure can individually work for a while by another set of winding without the broken down set of winding, start and operation of an electric driven system would not be influenced, and load shedding operation is needed, and midway stop is not necessary, so reliability of the electric driven system of the whole vehicle is improved.
Description
Technical field
The utility model belongs to threephase asynchronous connection technology field, relates to a kind of threephase asynchronous Winding Design, is specifically related to a kind of used for electric vehicle threephase asynchronous redundancy winding construction.
Background technology
The application of simplex winding structure in used for electric vehicle threephase asynchronous is at present comparatively extensive.Simplex winding structure electric machine exciting current is large, power factor is low; High order harmonic component is large, operational efficiency is low; A phase in motor stator winding (or a few phase), or the one (or several) brachium pontis of inverter breaks down, car load must stop off, the poor reliability of system.
Utility model content
The purpose of this utility model is to provide a kind of used for electric vehicle threephase asynchronous redundancy winding construction, and the simplex winding structure threephase asynchronous power factor that has solved existing used for electric vehicle is low, and operational efficiency is low, the problem that system reliability is poor.
The technical scheme that the utility model adopts is, a kind of used for electric vehicle threephase asynchronous redundancy winding construction, comprises two cover stator winding, the two cover stator winding α electrical degree that staggers in space.
Feature of the present utility model is also,
Every cover stator winding is wherein spatially symmetrical, and every phase winding wire gauge is identical, 120 °, phase winding interval electrical degree.
Wherein
, the groove that Z is motor is counted number of stator slots, and p is number of pole-pairs, and N is the groove number that corresponding double winding differs.
The beneficial effects of the utility model are to adopt redundancy winding construction to improve power factor, operational efficiency and the system reliability of used for electric vehicle threephase asynchronous.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is single Y winding construction motor power drive system schematic diagram;
Fig. 3 is single Y winding construction motor power drive system fault schematic diagram;
Fig. 4 is the two Y structural redundancy winding electric machine power drive system schematic diagrames of the utility model;
Fig. 5 is the two a set of winding failure schematic diagrames of Y structural redundancy winding electric machine power drive system of the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
The utility model used for electric vehicle threephase asynchronous redundancy winding construction, as shown in Figure 1, comprises two cover stator winding A
1b
1c
1and A
2b
2c
2, the double winding α electrical degree that staggers in space, every cover three phase windings are spatially symmetrical, and every phase winding wire gauge is identical, 120 °, phase winding interval electrical degree.After winding energising, A
1b
1c
1every phase winding phase current is leading A respectively
2b
2c
2corresponding winding phase current α time electrical degree.Wherein, to count Z relevant with number of pole-pairs p for the value of α and motor stator slot.
, in formula, N is the groove number that corresponding double winding differs.Before the energising of motor double winding, first according to high order harmonic component, offset result of calculation,
when to be that the second cover winding is every switch on mutually at angle with the electrical degree of the every corresponding voltage delay of first set winding;
angle is derived according to following formula 4,5,6, if α=20 °, for 7 subharmonic,
solve
; If α=15 °, for 11 subharmonic,
solve
.By controller, to the second cover winding, lead to hysteresis first set winding again
the voltage of electrical degree.
From principle aspect, the utility model is described below:
1, single Y winding construction motor excitation electric current is large, and power factor is low.And two Y winding construction motors, due to U
1≈ 4.44f
1w
1k
w1φ
m, work as W
1, k
w1and φ
mone regularly, U
1∝ φ
m.Therefore, additional U
1when constant, φ
msubstantially constant.First set winding A
1b
1c
1to the second cover winding A
2b
2c
2the magnetic potential of setting up has stronger magnetic assist effect.So the in the situation that of the same magnetic field of correspondence, exciting current I
2relatively reduce, total exciting current I is less than the exciting current I ' that simplex winding connects, and the power factor of motor is improved, and has strengthened the load-carrying ability of motor.
2, single Y winding construction motor high order harmonic component is large, and operational efficiency is low.And two Y winding construction motor first set windings are different with current time phase place with the spatial distribution of the second cover winding, this special construction can reduce high order harmonic component magnetic potential, thereby reduces high order harmonic component loss.The 5 subharmonic magnetic potentials of take are below analyzed as example:
1) the second cover winding quintuple harmonics composite magnetic power
Each phase pulsating magnetic potential expression formula:
In formula, F
25it is the amplitude of the second cover winding quintuple harmonics pulsating magnetic potential.
The quintuple harmonics pulsating magnetic potential of second each phase of cover winding is decomposed into two rotating magnetic potentials, then is added, arrange to such an extent that the second quintuple harmonics that overlaps winding three-phase synthesizes magnetomotive force expression formula:
Get θ=30 °,
f
25(X，t)＝3/2F
25sin(ωt+(5π/τ)X-π) （5）
2) first set winding 5 subharmonic composite magnetic power expression formulas
f
15(X，t)＝3/2F
15sin(ωt+(5π/τ)X) （6）
3) first set winding and the second cover winding quintuple harmonics composite magnetic power
f
+5(X，t)=f
15+f
25
＝3/2F
25sin(ωt+(5π/τ)X-π)+3/2F
15sin(ωt+(5π/τ)X) （7）
If f
15=f
25, f
+ 5(X, t)=0.
From upper surface analysis, if we suitable choose α value with
value, just can eliminate certain high order harmonic component magnetic potential and loss, reduces supplementary load loss, makes the efficiency of motor improve more than 1%.
3, the power drive system (Fig. 2) that single Y winding construction motor forms, in stator winding, a brachium pontis of a phase or inverter breaks down (Fig. 3), the necessary stop off of car load, the poor reliability of system; And the power drive system (Fig. 4) that two Y winding construction motors form, double winding can work simultaneously, also can carry out separately respectively work.When a phase of a set of winding (or a few phase) stator winding open circuited wherein, or while there is open fault in the one (or several) bridge wall of inverter (Fig. 5), throw out of order this cover winding away, with another set of winding, can work independently a period of time, can not affect starting and the operation of power drive system, only need load shedding operation and needn't stop off, improved the reliability of car load power drive system.
Claims (1)
1. a used for electric vehicle threephase asynchronous redundancy winding construction, is characterized in that, comprises two cover stator winding, the two cover stator winding α electrical degrees that stagger in space;
Described every cover stator winding is spatially symmetrical, and every phase winding wire gauge is identical, 120 °, phase winding interval electrical degree;
Described
z is that the groove of motor is counted number of stator slots, and p is number of pole-pairs, and N is the groove number that corresponding double winding differs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320535225.8U CN203522474U (en) | 2013-08-29 | 2013-08-29 | Three-phase asynchronous motor redundant winding structure used for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320535225.8U CN203522474U (en) | 2013-08-29 | 2013-08-29 | Three-phase asynchronous motor redundant winding structure used for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203522474U true CN203522474U (en) | 2014-04-02 |
Family
ID=50381348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320535225.8U Expired - Fee Related CN203522474U (en) | 2013-08-29 | 2013-08-29 | Three-phase asynchronous motor redundant winding structure used for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203522474U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880046A (en) * | 2017-05-11 | 2018-11-23 | 蒂森克虏伯电梯（上海）有限公司 | Traction machine and the elevator for being equipped with this kind of traction machine |
| CN110855110A (en) * | 2019-11-07 | 2020-02-28 | 联创汽车电子有限公司 | Redundant electric machine and method for assembling same |
-
2013
- 2013-08-29 CN CN201320535225.8U patent/CN203522474U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880046A (en) * | 2017-05-11 | 2018-11-23 | 蒂森克虏伯电梯（上海）有限公司 | Traction machine and the elevator for being equipped with this kind of traction machine |
| CN110855110A (en) * | 2019-11-07 | 2020-02-28 | 联创汽车电子有限公司 | Redundant electric machine and method for assembling same |
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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: 20140402 Termination date: 20170829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |