CN201018383Y - Permanent magnet brushless motor for electric vehicle - Google Patents
Permanent magnet brushless motor for electric vehicle Download PDFInfo
- Publication number
- CN201018383Y CN201018383Y CNU2007200669887U CN200720066988U CN201018383Y CN 201018383 Y CN201018383 Y CN 201018383Y CN U2007200669887 U CNU2007200669887 U CN U2007200669887U CN 200720066988 U CN200720066988 U CN 200720066988U CN 201018383 Y CN201018383 Y CN 201018383Y
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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
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- Windings For Motors And Generators (AREA)
- Brushless Motors (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model relates to a permanent magnet brushless motor for an electric vehicle, which comprises a stator component with groove teeth, a rotor composed of a magnetic steel and a magnetic yoke ring, a winding with the three-phase star connection structure and a position transducer arranged on the winding; the two effective working edges of each winding coil are respectively arranged in the two adjacent grooves, which makes the length of the non-working part of the coil end part be one polar distance in order to reach the minimum size, called as the short-distance winding; the number of each phase winding coil is the odd number, the base number a of the groove number in the stator component is the integral multiple of the phase number of the motor, the base number b of the pole number is equal to the base number a plus/minus 1 of the groove number, and the ratio between the groove number and the pole number is a fraction value. Therefore, when the motor operates, the moment fluctuation produced by the tooth groove gains the greater reduction and the frequency of the moment fluctuation gains the larger improvement, which makes the riders not feel the moment fluctuation and the comfortlessness.
Description
Technical field
The utility model relates to a kind of permanent magnetic brushless, relates to a kind of electric vehicle permanent magnetic brushless specifically.
Background technology
Electric motor car is for the requirement of motor normally: starting torque is big, operational efficiency is higher, useful life is long, speed change is more convenient etc.Motor is divided into brush motor, brushless electric machine and switched reluctance machines at present.The application brushless electric machine is more.But there are some shortcomings in existing brushless electric machine, as: starting torque is less, inefficiency the etc. when torque ripple during low speed big (when torque ripple was big, the rider felt under the weather), big electric current.Existing brushless electric machine comprises 16 utmost points in its stator module, 48 grooves, and its groove number/number of poles=48/16=3 is integer.Therefore, 16 grooves boundary by magnetic field is simultaneously arranged in the motor rotation process, the amplitude of the torque fluctuations that its produces is single groove by the amplitude of the intersection torque fluctuations in magnetic field 16 times, cause its torque ripple bigger.And the span of its winding coil is bigger, for from four grooves of first groove to the, causes overhang to grow (striding 3 pole spans), makes the electromagnetic wire consumption increase, and the waste resource reduces motor properties simultaneously.
Summary of the invention
The purpose of this utility model for starting torque and the operational efficiency that improves brushless electric machine, reduces the torque fluctuations of brushless electric machine in order to overcome the shortcoming of above-mentioned prior art brushless electric machine; Provide a kind of and make that its torque fluctuations is less, electric efficiency is higher, starting torque is big, useful life is long, the more convenient electric vehicle permanent magnetic brushless of speed change.
The utility model to achieve the above object, the technical scheme of being taked is, it comprises the stator module that contains the groove tooth, the rotor that constitutes by magnet steel and yoke ring, the winding of three-phase Y-connection structure and place position transducer on the winding, two effective working edges of each winding coil lay respectively in two adjacent grooves, the number of every phase winding coil is an odd number, the radix a of groove number is the integral multiple of number of motor phases in the stator module, the radix b of number of poles equals radix a ± 1 of groove number in the rotor, and the groove number is a fractional value with the ratio of number of poles.
The course of work of motor: during machine operation, by position transducer magnet steel position in the rotor is detected, the position signalling of the corresponding magnet steel of winding is sent in the controller of motor, undertaken providing the predetermined electric current conducting direction to corresponding windings after the logic decision by electric machine controller, make two phase windings in three phase windings switch on, and making the energising winding produce the same moment that turns to, another phase winding wouldn't be switched on; After motor turned over certain angle, after the position of winding and magnet steel changed, winding after position transducer will change and the position of magnet steel relation in time were sent to controller, by the corresponding two phase windings direction conducting in accordance with regulations of controller control.Make moment direction that the energising winding produces be consistent before.
Brushless electric machine of the present utility model makes that the length of the idle part of overhang is 1 pole span because two effective working edges of each coil are placed on respectively in two adjacent grooves, has reached minimum size, is the short distance winding.It has reduced the consumption of electromagnetic wire, has reduced the cost of raw material of motor, has also reduced the internal resistance of motor simultaneously, has reduced the copper loss of motor, has improved efficiency of motor.Make that simultaneously adjacent two magnetic directions that the utmost point produced are opposite under the same winding, the path of reducing field circuit reduces the yoke area of the silicon steel sheet utmost point and interpolar, reduces the consumption of silicon steel sheet, the reduction cost of raw material.Because of above-mentioned reason, also reduce the weight of motor simultaneously, improve the energy output rating of Unit Weight.Because motor of the present utility model is reduced to the consumption of resource, thereby be used for the very big electric motor car of annual output, will save appreciable resource.
As above-mentioned electric machine structure of the present utility model, because the base value b of number of poles is base value a ± 1 of groove number, the base value a of groove number is the integral multiple of number of motor phases, because number of motor phases is 3 phases (normally three-phase or four phases) at least, the number of every phase winding coil is an odd number, so each winding comprises at least 3 coils, each coil takies 3 grooves at least, therefore, base value a 〉=9 of groove number; Simultaneously, the base value of the base value of groove number and number of poles can enlarge by integral multiple in proportion.In above-mentioned the technical solution of the utility model, the groove number is a fractional value with the ratio of number of poles, therefore, motor is in running, and the groove number of the boundary by magnetic field is 3 (identical with synchronous multiplication factor) simultaneously, makes motor when operation, the torque fluctuations that teeth groove produces obtains reduction by a relatively large margin, and the frequency of torque fluctuations is greatly improved, and makes the fluctuation of the imperceptible moment of rider, and the people just can not feel under the weather yet; Simultaneously, for more groove number and number of poles, will help the diameter of motor is done greatly, and the diameter of motor is big more, the moment of motor output is just big more; Magnet steel just more can improve electric efficiency if adopt high performance Nd-Fe-B magnet steel (rare earth magnetic steel) simultaneously, reduces motor volume and weight, has improved the torque of motor output, has improved the starting performance and the grade climbing performance of electric motor car.
Description of drawings
Fig. 1 is the schematic diagram of external rotor electric machine structure;
Fig. 2 is the schematic diagram of inner rotor motor structure;
Fig. 3 a, 3b, 3c are the schematic diagram that winding launches.
Embodiment
Further specify the architectural feature of the utility model motor below in conjunction with accompanying drawing.
Shown in Fig. 1,2,3a, 3b, 3c, the utility model motor comprises stator module 1, the rotor 2 that constitutes by magnet steel 201 and yoke ring 202, the winding 3 of three-phase Y-connection structure and place position transducer 4 (Fig. 3 a, 3b, 3c show) on the winding 3, two effective working edges of each winding coil lay respectively in two adjacent grooves, the number of every phase winding coil is an odd number, the radix a of groove number is the integral multiple of number of motor phases in the stator module, the radix b of number of poles equals radix a ± 1 of groove number in the rotor, and the groove number is a fractional value with the ratio of number of poles.
In the present embodiment, the pitch of winding coil is 1, is the short distance winding.
In the present embodiment, the number of phases of motor is 3 phases, as the A phase among Fig. 3 a, B phase, C phase, the number of every phase winding coil is an odd number, comprises 3 coils so each winding is minimum, and each coil is minimum to take 3 grooves, the base value a=9 of the groove number of motor minimum, the base value b=a+1=10 of number of poles; The base value a of groove number is increased 3 times, a=27, the base value b=28 of number of poles then, groove number/number of poles=27/28, it is amplified 3 times synchronously is 81/84, shown in Fig. 3 a, 3b, 3c.This ratio is mark, is not integer.Like this, when motor in running, the groove number of the boundary by magnetic field is 3 (identical with synchronous multiplication factor) simultaneously, the torque fluctuations amplitude that makes motor produce at the teeth groove in when operation is reduced to original 1/28, and the frequency of torque fluctuations rises to original 28 times, make the fluctuation of the imperceptible moment of rider, the people just can not feel under the weather yet.
It is the left side by the right connection layout 3b drawing of Fig. 3 a drawing that the present embodiment winding launches complete figure, and the left side of the right connection layout 3c drawing of Fig. 3 b drawing is formed, and promptly couples together the figure that launches into whole winding before and after three width of cloth figure.Groove 101 is 81 grooves (to the magnet steel of 84 utmost points) among Fig. 3 a, 3b, the 3c, and two effective working edges 102 of coil are placed on respectively in two adjacent grooves 101, and in the present embodiment, 81 grooves are to 84 utmost points, groove number and number of poles that this is many at last.Winding is switch on the in twos structure of Y-connection of three-phase, and the structure of winding technique direction and wiring (line of levels winding) is as shown in Fig. 3 a, 3b, 3c.
Claims (5)
1. electric vehicle permanent magnetic brushless, it comprises the stator module that contains the groove tooth, the rotor that constitutes by magnet steel and yoke ring, the winding of three-phase Y-connection structure and place position transducer on the winding, two effective working edges that it is characterized in that each winding coil lay respectively in two adjacent grooves, the number of every phase winding coil is an odd number, the radix a of groove number is the integral multiple of number of motor phases in the stator module, the radix b of number of poles equals radix a ± 1 of groove number, and the groove number is a fractional value with the ratio of number of poles.
2. electric vehicle permanent magnetic brushless according to claim 1 is characterized in that the pitch of winding coil equals 1.
3. electric vehicle permanent magnetic brushless according to claim 1 is characterized in that each winding comprises 3 coils at least.
4. electric vehicle permanent magnetic brushless according to claim 1 is characterized in that each coil takies 3 grooves at least.
5. electric vehicle permanent magnetic brushless according to claim 1 is characterized in that radix a 〉=9 of described groove number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200669887U CN201018383Y (en) | 2007-02-02 | 2007-02-02 | Permanent magnet brushless motor for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200669887U CN201018383Y (en) | 2007-02-02 | 2007-02-02 | Permanent magnet brushless motor for electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201018383Y true CN201018383Y (en) | 2008-02-06 |
Family
ID=39058883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200669887U Expired - Fee Related CN201018383Y (en) | 2007-02-02 | 2007-02-02 | Permanent magnet brushless motor for electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201018383Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448772A (en) * | 2018-02-10 | 2018-08-24 | 康富科技股份有限公司 | A kind of threephase generator monolayer distribution short distance winding |
-
2007
- 2007-02-02 CN CNU2007200669887U patent/CN201018383Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448772A (en) * | 2018-02-10 | 2018-08-24 | 康富科技股份有限公司 | A kind of threephase generator monolayer distribution short distance winding |
| CN108448772B (en) * | 2018-02-10 | 2023-11-10 | 康富科技有限公司 | Single-layer distributed short-distance winding of three-phase generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080206 |