CN202167911U - Hub motor of electric automobile - Google Patents
Hub motor of electric automobile Download PDFInfo
- Publication number
- CN202167911U CN202167911U CN2011202746456U CN201120274645U CN202167911U CN 202167911 U CN202167911 U CN 202167911U CN 2011202746456 U CN2011202746456 U CN 2011202746456U CN 201120274645 U CN201120274645 U CN 201120274645U CN 202167911 U CN202167911 U CN 202167911U
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- Prior art keywords
- electric automobile
- hub motor
- stator
- permanent magnet
- winding
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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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Abstract
The utility model provides a hub motor of an electric automobile. The hub motor includes an outer rotor, a stator, a rotary shaft, permanent magnets and a winding. The outer rotor is a cylindrical hollow cavity. The stator is disposed in the outer rotor. The rotary shaft goes through the stator and then two ends of the rotary shaft connects with the outer rotor. A plurality of the permanent magnets are arranged uniformly along the periphery of the surface of an inner side wall of the outer rotor. A magnetic adjusting tooth is arranged on the stator at a position close to the permanent magnets. The winding is arranged on the stator at a position far from the permanent magnets and close to the rotary shaft. A central line of the outer rotor is in coincidence with a central line of the rotary shaft. The hub motor of the electric automobile can be applied directly to the electric automobile needing low-speed direct drive or other occasions needing low-speed drive and can improve the response speed of the whole drive system of the electric automobile. At the same time, the hub motor of the electric automobile in the utility model has a compact structure and small volume, thereby facilitating the integration degree of electric automobile parts.
Description
[technical field]
The utility model relates to machine field, especially relates to a kind of hub motor for electric automobile.
[background technology]
Along with the energy and problem of environmental pollution that the whole world faces are serious day by day, the advantage of the energy-conservation and low emission of electric automobile has won the favor of numerous automakers and research institution.And motor driven systems is the core component of electric automobile, directly determines the energy-conservation and low pollutant performance of electric automobile.The wheel hub motor drive system relies on, and characteristics efficient, high power density become the state-of-the-art type of drive of electric automobile.The automobile driving system that the wheel hub motor drive system is general relatively has the following advantages:
1, utilization wheel hub motor drive system makes automobile cancel a large amount of mechanical driving parts, and for example, clutch, speed changer, power transmission shaft, differential mechanism etc. have improved the integrated level of automobile, have realized the lightweight of car mass;
2, the wheel hub motor drive system can be accomplished the control of various wheel drive power through motor and control system, has replaced complicacy and the slow control system of mechanical response in the general automobile;
3, the wheel hub motor drive system adopts brake energy recovering system to each wheel, improves vehicle energy utilization factor and realizes energy-conservation;
4, the automobile based on the wheel hub motor drive system can adopt the line traffic control wheel to turn to technology, can effectively reduce turning radius, increases the flexibility of motor turning;
5, the wheel hub motor drive system can realize automobile chassis system electronicization, activeization, make chassis structure simplify, thereby the layout of car load and body shape design freedom strengthens;
6, adopt flexible cable to be connected between the Electric Motor Wheel that drives of wheel hub motor and the power source, occupy little space, improved the automobile integrated level, simultaneously, increased the flexibility of car load layout.
In the wheel hub drive system, motor is its core component.General wheel hub drives electric automobile and mainly comprises inner rotor motor.Complicated shape star gear reduction lets motor rotating at high speed slow down thereby inner rotor motor need mate a cover, makes rotating speed of motor satisfy the needs of the actual speed of automobilism.The structure of this kind inner rotor motor very complicated has increased the volume and weight of whole drive system; The inner rotor motor of this type is because the existence of reducing gear in the inner rotor motor simultaneously; Make that inner rotor motor noise in operating and mechanical wear are big, reduced the response speed and the operating efficiency of whole drive system simultaneously.
[utility model content]
Based on this, be necessary to provide a kind of hub motor for electric automobile, can save the reducing gear of inner rotor motor, directly drive electric automobile.
A kind of hub motor for electric automobile comprises external rotor, stator, rotating shaft, permanent magnet and winding.External rotor is the cylindrical, hollow cavity.Stator is built in the external rotor.Two ends were connected with external rotor after stator was passed in rotating shaft.The interior side-wall surface of external rotor is evenly laid some permanent magnets along circumference.Stator is provided with the adjustable magnetic tooth near the position of permanent magnet, and stator is wound with winding away from permanent magnet near the position of rotating shaft.The center line of external rotor and the central lines of rotating shaft.
In a preferred embodiment, some magnet rings are parallel with the circular surface of external rotor around the plane at the circumference place that forms.Permanent magnet along magnet ring around circumferencial direction magnetize, two adjacent permanent magnet poles are opposite.The material of permanent magnet is a neodymium iron boron.
In a preferred embodiment, external rotor comprises the commentaries on classics limit of two rotating turrets and closed circumference shape, and two rotating turrets are installed in through fixture and change the both sides that the limit is parallel to each other.This fixture is a bolt.Two rotating turrets are connected with an end of rotating shaft through a bearing respectively.Rotating turret, rotating shaft and bearing are the high resistivity non-magnet material.Changeing limit and stator is superimposed silicon steel sheet.
In a preferred embodiment, stator comprise be provided with matrix, from matrix to the extended some equally spaced winding cores of being separated by of permanent magnet direction, from the winding core to the extended some equally spaced adjustable magnetic teeth of being separated by of permanent magnet direction.Matrix is provided with the through hole that supplies rotating shaft to pass.Winding is wound on the winding core.
In a preferred embodiment, be separated with air gap between adjustable magnetic tooth and the permanent magnet.The number of adjustable magnetic tooth equals the logarithm and the winding number of pole-pairs sum of permanent magnet.
Above-mentioned hub motor for electric automobile has saved baroque reducing gear in the internal rotor, can directly be used for the different occasions that need low speed directly to drive electric automobile or other driven at low speed, has improved the response speed of whole electric automobile drive system.This hub motor for electric automobile compact conformation simultaneously, volume is little, helps improving the integrated level of electric automobile parts.
[description of drawings]
Fig. 1 is the embodiment sketch map of the utility model electric automobile hub;
Fig. 2 is another angle sketch map of embodiment of the utility model electric automobile hub;
Fig. 3 is that winding twines sketch map among the embodiment of the utility model electric automobile hub.
[embodiment]
Present embodiment has proposed a kind of hub motor for electric automobile, has saved baroque reducing gear in the internal rotor, can directly drive electric automobile.Simultaneously, this hub motor for electric automobile compact conformation has been simplified electric machine, has reduced volume, weight and the cost of manufacture of motor.
See also Fig. 1, the hub motor for electric automobile that present embodiment provides comprises external rotor 10, stator 20, rotating shaft 30, permanent magnet 40 and winding 50.External rotor 10 is the cylindrical, hollow cavity.Stator 20 is built in the external rotor 10.Rotating shaft 30 is passed two ends, stator 20 back and is connected with external rotor 10.The interior side-wall surface of external rotor 10 is evenly laid some permanent magnets 40 along circumference.Stator 20 is provided with adjustable magnetic tooth 201 near the position of permanent magnet 40, and stator 20 is wound with winding 50 away from permanent magnet 40 near the position of rotating shaft 30.The central lines of the center line of external rotor 10 and rotating shaft 30.
As shown in Figure 1, external rotor 10 comprises the commentaries on classics limit 101 of two rotating turrets 102 and closed circumference shape.Two rotating turrets 102 are installed in through fixture and change the both sides that limit 101 is parallel to each other.This fixture is a bolt 90.Two rotating turrets 102 are connected with an end of rotating shaft 30 through a bearing 70 respectively.Rotating turret 102, rotating shaft 30 and bearing 70 are the high resistivity non-magnet material.Changeing limit 101 is superimposed silicon steel sheet.Consult the schematic cross-section of Fig. 1 shown in Figure 2 along the AA direction simultaneously, the commentaries on classics limit 101 of external rotor 10 also is socketed with automotive hub 80.
Consult Fig. 1 and Fig. 2 simultaneously, some permanent magnets 40 are parallel with the circular surface of external rotor 10 around the plane at the circumference place that forms, the plane parallel that promptly belongs to rotating turret 102 shown in Figure 1.Permanent magnet 40 along permanent magnet 40 around circumferencial direction magnetize.And two adjacent permanent magnet 40 magnetic poles are opposite.The permanent magnet 40 that shows in the present embodiment as shown in Figure 2 is 16 pairs, 32.The material of permanent magnet 40 is a neodymium iron boron.
See also Fig. 1 and Fig. 2, stator 20 comprise be provided with matrix 203, from matrix 203 to the extended some equally spaced winding cores 202 of being separated by of permanent magnet 40 directions, from winding core 202 to the extended some equally spaced adjustable magnetic teeth 201 of being separated by of permanent magnet 40 directions.In hub motor for electric automobile embodiment as shown in Figure 2, there are six from matrix 203 extended equally spaced winding cores 202.Accordingly, extended equally spaced adjustable magnetic tooth 201 has three on winding 50 each winding core 202.Matrix 203 is provided with the through hole that supplies rotating shaft 30 to pass.Winding 50 is wound on the winding core 202.The material of whole stator 20 is superimposed silicon steel sheet.
See also Fig. 1 or Fig. 2, be separated with air gap between adjustable magnetic tooth 201 and the permanent magnet 40.
Among this hub motor for electric automobile embodiment, as shown in Figure 2, winding core 202 has six, and winding 50 has six accordingly.See also Fig. 3, so winding 50 is three-phase, the magnetic pole logarithm is two.501a and 501b are first mutually, and 501a is opposite with the 501b winding direction, and the magnetic pole logarithm is two; The rest may be inferred, and 502a and 502b are second mutually, and winding direction is opposite, and 503a and 503b are third phase, and the magnetic pole logarithm is two.As shown in Figure 3,501a, 502a, 503a order respectively are wound on three adjacent winding cores 202,501b, and 502b and 503b are wound on remaining three adjacent winding cores 202 by same sequence next-door neighbour 503a in proper order.Winding 50 in the present embodiment is concentrated two layer winding for fractional-slot.Therefore winding 50 has the tip lengths weak point, and copper factor is high, and technology is simple and can realize the machine coiling.
The magnetic field modulation principle that the said hub motor for electric automobile its working principles of the foregoing description is the adjustable magnetic tooth.According to the energy converting between mechanical theorem: stable NE BY ENERGY TRANSFER will be carried out in two magnetic fields, and these two field pole logarithms must be identical.Traditional motor is that the main field magnetic pole logarithm of main field magnetic pole logarithm and stator of rotor is identical and carry out the transmission of energy, reaches the purpose of machine operation.The hub motor for electric automobile that present embodiment provides is the main field of regulating permanent magnets 40 through adjustable magnetic tooth 201, lets it produce a series of harmonic field, and the field pole logarithm that makes wherein certain first harmonic magnetic field and stator generation is identical and transmit stable energy.
Should satisfy following primary condition during the hub motor for electric automobile steady operation:
Number of pole-pairs: p
r=n
s-p
s(1)
External rotor stator field rotating ratio:
p
rBe the magnetic pole logarithm of permanent magnet, n
sBe the number of adjustable magnetic tooth, p
sBe the winding number of pole-pairs.G
rRotating ratio for external rotor and stator field.
Can find out that from formula (1) number of adjustable magnetic tooth 201 equals the logarithm and the winding 50 number of pole-pairs sums of permanent magnet 40.In the present embodiment, permanent magnet 40 is 16 pairs of magnetic poles, and the number of adjustable magnetic tooth 201 is 18, so winding 50 magnetic pole logarithms are two.The magnetic field rotating ratio that from formula (2), can draw permanent magnet 40 and stator on the external rotor 10 is G
r=-8.Therefore, the speed of the external rotor in the present embodiment has only 1/8 of stator rotating magnetic field rotating speed.The direction of stator field is opposite with external rotor permanent magnet body magnetic direction.If the electric automobile frequency of supply is 50Hz, then the rotating speed of the rotating magnetic field of nail is 1500rpm, so the rotating speed of external rotor is the speed requirement that 187.5rpm just can satisfy the electric automobile operation basically.In other electric automobile hubs embodiment, the magnetic pole logarithm of permanent magnet 40 is as long as the magnetic pole logarithm of the number of adjustable magnetic tooth 201 and winding 50 satisfies the relation of formula 1.
Above-mentioned hub motor for electric automobile has saved baroque reducing gear in the internal rotor, can directly be used for the different occasions that need low speed directly to drive electric automobile or other driven at low speed, improves the response speed of whole electric automobile drive system.This hub motor for electric automobile compact conformation simultaneously, volume is little, helps improving the integrated level of electric automobile parts.
Above embodiment has only expressed several kinds of execution modes of the utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to the protection range of the utility model.Therefore, the protection range of the utility model patent should be as the criterion with accompanying claims.
Claims (10)
1. a hub motor for electric automobile is characterized in that, comprises external rotor, stator, rotating shaft, permanent magnet and winding; Said external rotor is the cylindrical, hollow cavity, and said stator is built in the said external rotor, and two ends were connected with said external rotor after said stator was passed in said rotating shaft; The interior side-wall surface of said external rotor is evenly laid some said permanent magnets along circumference; Said stator is provided with the adjustable magnetic tooth near the position of said permanent magnet; Said stator is wound with said winding, the center line of said external rotor and the central lines of said rotating shaft away from said permanent magnet near the position of said rotating shaft.
2. hub motor for electric automobile according to claim 1 is characterized in that, said some magnet rings are parallel with the circular surface of said external rotor around the plane at the circumference place that forms.
3. hub motor for electric automobile according to claim 2 is characterized in that, said permanent magnet along said magnet ring around circumferencial direction magnetize, two adjacent permanent magnet poles are opposite.
4. according to each described hub motor for electric automobile of claim 1 to 3, it is characterized in that said permanent magnet material is a neodymium iron boron.
5. hub motor for electric automobile according to claim 1 is characterized in that, said external rotor comprises the commentaries on classics limit of two rotating turrets and closed circumference shape, and said two rotating turrets are installed in the both sides that said commentaries on classics limit is parallel to each other through fixture; Said two rotating turrets are connected with an end of said rotating shaft through a bearing respectively.
6. hub motor for electric automobile according to claim 5 is characterized in that, said fixture is a bolt.
7. hub motor for electric automobile according to claim 5 is characterized in that, said rotating turret, rotating shaft and bearing are the high resistivity non-magnet material; Said commentaries on classics limit and said stator are superimposed silicon steel sheet.
8. hub motor for electric automobile according to claim 1; It is characterized in that, said stator comprise be provided with matrix, from matrix to the extended some equally spaced winding cores of being separated by of said permanent magnet direction, from the winding core to the extended some equally spaced adjustable magnetic teeth of being separated by of said permanent magnet direction; Said matrix is provided with the through hole that supplies said rotating shaft to pass; Said winding is wound on the said winding core.
9. hub motor for electric automobile according to claim 1 is characterized in that, is separated with air gap between said adjustable magnetic tooth and the said permanent magnet.
10. hub motor for electric automobile according to claim 1 is characterized in that, the number of said adjustable magnetic tooth equals the logarithm and the said winding number of pole-pairs sum of said permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202746456U CN202167911U (en) | 2011-07-30 | 2011-07-30 | Hub motor of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202746456U CN202167911U (en) | 2011-07-30 | 2011-07-30 | Hub motor of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202167911U true CN202167911U (en) | 2012-03-14 |
Family
ID=45803714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202746456U Expired - Lifetime CN202167911U (en) | 2011-07-30 | 2011-07-30 | Hub motor of electric automobile |
Country Status (1)
| Country | Link |
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| CN (1) | CN202167911U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710078A (en) * | 2012-06-13 | 2012-10-03 | 江苏大学 | Fault tolerance type permanent magnetic vernier motor |
| CN104742725A (en) * | 2013-12-31 | 2015-07-01 | 中国科学院深圳先进技术研究院 | Wheel hub driving device with planetary motors and wheel power system adopting wheel hub driving device |
| CN108336837A (en) * | 2018-02-26 | 2018-07-27 | 江苏大学 | A kind of composite excitation direct driving motor |
| CN111268340A (en) * | 2015-01-28 | 2020-06-12 | 自动存储科技股份有限公司 | Remotely operated vehicle for picking up storage bins and storage system for storage bins |
-
2011
- 2011-07-30 CN CN2011202746456U patent/CN202167911U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710078A (en) * | 2012-06-13 | 2012-10-03 | 江苏大学 | Fault tolerance type permanent magnetic vernier motor |
| CN104742725A (en) * | 2013-12-31 | 2015-07-01 | 中国科学院深圳先进技术研究院 | Wheel hub driving device with planetary motors and wheel power system adopting wheel hub driving device |
| CN111268340A (en) * | 2015-01-28 | 2020-06-12 | 自动存储科技股份有限公司 | Remotely operated vehicle for picking up storage bins and storage system for storage bins |
| CN108336837A (en) * | 2018-02-26 | 2018-07-27 | 江苏大学 | A kind of composite excitation direct driving motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120314 |
|
| CX01 | Expiry of patent term |