CN203313025U - Direct-current brushless hub motor - Google Patents
Direct-current brushless hub motor Download PDFInfo
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- CN203313025U CN203313025U CN2013202891213U CN201320289121U CN203313025U CN 203313025 U CN203313025 U CN 203313025U CN 2013202891213 U CN2013202891213 U CN 2013202891213U CN 201320289121 U CN201320289121 U CN 201320289121U CN 203313025 U CN203313025 U CN 203313025U
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- laminated core
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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 discloses a direct-current brushless hub motor, including a stator, a rotor, a bearing and a shaft. The stator includes a laminated core and coils. The laminated core is fixed on the shaft. The periphery of the laminated core is provided with thirty teeth by punching. A groove is formed between the two adjacent teeth. Each groove is internally wound with a coil, and the number of the coils is thirty. The thirty coils are connected to form a three-phase winding, each phase has ten coils, and the circumference of the laminated core is distributed with four phase belts. The rotor includes a magnetic yoke cylinder and magnetic steel blocks. The inner surface of the magnetic yoke cylinder is fixed with twenty-six pieces of the magnetic steel blocks. The twenty-six pieces of the magnetic steel blocks are arranged in a manner that S poles and N poles are alternated after being magnetized, and thus twenty-six magnetic poles are formed. A fixed air gap is kept between the magnetic steel blocks and the excircle of the teeth of the laminated core. The magnetic yoke cylinder is fixed on the shaft through the bearing. The direct-current brushless hub motor is advantaged by high efficiency, high power density, small size, light weight and the like, and can achieve reasonable balance among the technical performance, the cost and the price.
Description
Technical field
The utility model relates to a kind of brushless DC hub-motor.
Background technology
Take storage battery or other similar DC power supply is the energy, and the motor driven for motor vehicle is divided into brush motor and brushless electric machine two classes.Wherein brush motor is divided into again two kinds, electric excitation brush motor and permanent magnet brush motor.And brushless electric machine generally all adopts a kind of form of three-phase six states " energising in twos ".There are brush and brushless two class motors that pluses and minuses are respectively arranged.In recent years, improvement due to the progress of brushless electric machine control technology and power electronic device performance used, and brushless electric machine intrinsic without wearing and tearing, substantially non-maintaining characteristics, brushless electric machine is mainly that three-phase brushless motor has obtained development faster, and the occupation rate on market progressively improves.
In the electric motor car industry, adopt the DC three-phase brushless motor of prior art at present, due to the difference of installation position, mainly be divided into high-speed central electric motor and low speed wheel hub motor two classes.High-speed central electric motor is by slowing down and the transmission system drives wheel, and, there is power transmission loss in mechanism's more complicated.And the low speed wheel hub motor is direct drive of wheel, do not need through transmission, there is no power transmission loss.Both compare, and wheel hub motor has obvious advantage, in electric bicycle and battery-operated motor cycle product, have occupied leading position now.
In recent years, the generally popular representative product of brush DC low speed wheel hub motor was following two kinds in the electric bicycle industry:
The first is 40 utmost point 36 sheave hub motors, since having occurred since 2003 and popular.Due to original hidden pole type brushless hub electric motor, compare have moment large, save copper cash, cost is low, trade name is known as " climbing king ".This kind type advantage is obvious, but shortcoming is remarkable too, is mainly that the static immobilization moment of motor is larger, causes galloping, and torque pulsation is excessive.Travel electromagnetic torque shake and the noise of middle motor of car two is large, and occupant's comfortableness is poor.Therefore popular through about 3 years, replaced by following improvement type gradually, seldom adopts at present, substantially exited the arena of history.
The second is 46 utmost point 51 sheave hub motors.Since appearance and popular in 2006.This kind type basically inherited 40 utmost point 36 sheave hub motor torques large, save copper cash and the low advantage of cost, and improved its shortcoming that static immobilization moment is large, torque pulsation is large and noise is large, trade name is known as " god of unusual strength ".For the applied low speed brushless hub electric motor of electric bicycle, in the scope of motor rated speed 200-400 r/m, " god of unusual strength " motor has higher efficiency and good performance index, having reached relatively reasonable utmost point groove and coordinated, is also the popular mainstream model of current electric bicycle industry.
This kind motor also has shortcoming.The first is because the armature slot number is too many, and groove width is too little, and the expenditure of time wound the line and insulating material consumption are increased to some extent, and copper factor reduces.It two is because the armature slot number is too many, makes the size reduction of armature slot and tooth, makes not too convenient at armature burial place sensing Hall circuit element and has influence on precision.Especially at armature diameter, be less than 170 millimeters, power is less than 200 watt-hours and brings very big difficulty.It three is that armature three phase windings have 51 coils, and every have 17 coils mutually, while in armature circumference 360 degree, carrying out the arranging of 5 facies tracts, can not accomplish completely all even symmetries, can therefore produce some extra electromagnetic unbalances.It four is because number of poles is too many, and the frequency of induction magnetic flux is higher in armature stamping, when rotating speed is higher, causes that iron loss strengthens, and no-load current strengthens, Efficiency Decreasing.It five is because number of magnetic poles is too many, makes the magnet steel width little, causes that the interelectrode magnetic leakage coefficient strengthens, and effectively pole embrace reduces, and causes the effective rate of utilization of magnet steel to descend and the potential waveform variation, affects motor performance.Therefore, this kind motor generally is only suitable under the rotating speed higher than 400 r/m, not working, and armature diameter should not be less than 180 millimeters.
But for the brushless DC hub-motor that is applied in battery-operated motor cycle and electric automobile, the motor speed when the specified speed of a motor vehicle generally is positioned at the scope of 500-900 r/m, not obviously that 46 utmost point 51 sheave hub motors can be contained.Once someone attempted the motor application of this kind structure and the cooperation of utmost point groove in battery-operated motor cycle and hub motor for electric automobile, the result obtained is that the empty load of motor electric current is large, loss is large, efficiency is low, heating is serious, the mileages of continuation of car load is short, has proved the limitation of this kind motor on the range of speeds.
For Miniature foldable electric motor car and electric wheel-chair vehicle, because wheel diameter is less, the diameter of wheel hub motor also must reduce.The vehicle wheel rotational speed of simultaneously Miniature foldable electric motor car also must be higher than 400r/m, based on two above-mentioned reasons, all makes the wheel hub motor of these two kinds of vehicles can not continue to use the motor pattern of 46 utmost point 51 grooves that generally adopted on the common electric bicycle again.
The utility model content
Technical problem to be solved in the utility model be to provide a kind of can be adapted to the application of battery-operated motor cycle, electric automobile, rated speed has the brushless DC hub-motor of premium properties in 400-900 r/m scopes.
In order to solve the problems of the technologies described above, technical scheme provided by the utility model is: a kind of brushless DC hub-motor comprises stator, rotor, bearing and axle; Described stator comprises laminated core and coil; Described laminated core is fixed on axle, and the periphery upper punch of laminated core is shaped with 30 teeth, between adjacent two teeth, forms a groove, in each groove, all is wound with a coil, has 30 coils; Described 30 coils are connected to become three phase windings, and every have ten coils mutually, and be four facies tracts by the circle distribution of laminated core; Described rotor comprises yoke cylinder and magnetic steel ingot; The inner surface of described yoke cylinder is fixed with 26 magnetic steel ingots; Described 26 magnetic steel ingots, after magnetizing, according to the S utmost point and N utmost point alternative arrangement, form 26 magnetic poles; Between the cylindrical of the tooth of described magnetic steel ingot and laminated core, keep a fixing air gap; Described yoke cylinder is fixed on axle by bearing.
The laminated core of described stator forms by the silicon steel sheet punching is folded.
The yoke cylinder of described rotor is made by mild steel.
The magnetic steel ingot of described rotor is by being pasted and fixed on the inner surface of yoke cylinder.
The magnetic steel ingot of described rotor is made by NdFeB rear-earth.
After having adopted technique scheme, the utlity model has following beneficial effect: (1) the utility model is in the range of speeds of 400-900 r/m, and the magnetic induction alternative frequency of iron core is in 86-195 Hz scopes.Numerous designs, test and production practices prove, in this frequency range, the utlity model has the advantages such as high efficiency, high power density, volume be little, lightweight, easily reach the reasonable balance of technical performance, cost and price, be particularly suitable for the requirement to the wheel hub motor range of speeds of electric automobile, battery-operated motor cycle.
(2) the utility model is simple in structure firm, technical maturity, and overload capacity is strong, and stable performance, reliability are high.Can adapt to motor vehicle and drive, especially the requirement of the hard work condition of In-wheel motor driving mode and harsh operational environment.
(3) slot-number ratio 46 utmost point 51 groove motor types of the present utility model greatly reduce, and for the measure-alike position sensing Hall circuit element of installing, the size of armature can reduce greatly, and still keeps the size of same or larger tooth and groove.The armature diameter of this motor, in the time of 120 millimeters, is compared when 198 millimeters of the armature diameters with popular 46 utmost point 51 scouring machine types, still has larger tooth pitch and slot pitch, therefore can more reasonably arrange the installation of inlaying of Hall circuit element.And armature diameter just can adapt to the requirement of Minitype folding electric bicycle wheel hub motor and the electric wheel-chair vehicle wheel hub motor of 200 watts of power well in the time of 120 millimeters.Therefore, this motor has the supporting application of broad product.
(4) static immobilization moment of the present utility model is less.Be less than the more 40 utmost point 36 scouring machine types of utmost point groove number.After adjusting the air-gap and design pole embrace of optimizing motor, static immobilization moment can reach below 2% of rated moment, and the stationarity of torque in service is better, and noise is little.Because the working speed section of this motor is higher, the smoothing effect of vehicle and the filtering of motor self inertia is more remarkable, and result of use is good.
(5) the utility model also is suitable for the application of low-speed direct driving wind-driven generator.Be particularly suitable for rotating speed 200-500 r/m, the trunnion axis in 600-6000 watts of low power ranges of power and vertical axis aerogenerator application.
The accompanying drawing explanation
For content of the present utility model more easily is expressly understood, below according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is structural representation of the present utility model.
Label in accompanying drawing is:
Laminated core 1, tooth 2, coil 3, yoke cylinder 4, magnetic steel ingot 5, axle 6.
Embodiment
(embodiment 1)
See Fig. 1, the brushless DC hub-motor of the present embodiment, comprise stator, rotor, bearing and axle 6.
Stator comprises laminated core 1 and coil 3.Laminated core 1 forms by the silicon steel sheet punching is folded.Laminated core 1 is fixed on axle 6, and the periphery upper punch of laminated core 1 is shaped with 30 teeth 2, between adjacent two teeth 2, forms a groove, in each groove, all is wound with a coil 3, has 30 coils 3.30 coils 3 are connected to become three phase windings, and every have ten coils 3 mutually, and be four facies tracts by the circle distribution of laminated core 1.
Rotor comprises yoke cylinder 4 and magnetic steel ingot 5.Yoke cylinder 4 is made by mild steel, and magnetic steel ingot 5 is made by NdFeB rear-earth.The inner surface of yoke cylinder 4 is fixed with 26 magnetic steel ingots 5 by stickup.26 magnetic steel ingots 5, after magnetizing, according to the S utmost point and N utmost point alternative arrangement, form 26 magnetic poles.Between the cylindrical of the tooth 2 of magnetic steel ingot 5 and laminated core 1, keep a fixing air gap.Yoke cylinder 4 is fixed on axle 6 by bearing.
When under the control of stator at controller of the brushless DC hub-motor of the present embodiment, passing into three-phase current in an orderly manner, rotor starts rotation, and can drive external loading (wheel) and rotate, and drives vehicle and advances or drag the operate outside machine operation.Such as axle 6 is fixedly installed on vehicle frame, wheel is installed on rotor, without any need for transmission device, just can drive Vehicle Driving Cycle when machine operation.
If, by the axle fixed installation, carry out rotor driven with external impetus (as wind wheel or the internal combustion engine of wind turbine generator), the brushless DC hub-motor of the present embodiment just can become generator, can provide electric power to external loading.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. a brushless DC hub-motor, is characterized in that: comprise stator, rotor, bearing and axle (6); Described stator comprises laminated core (1) and coil (3); It is upper that described laminated core (1) is fixed on axle (6), and the periphery upper punch of laminated core (1) is shaped with 30 teeth (2), between adjacent two teeth (2), forms a groove, in each groove, all is wound with a coil (3), has 30 coils (3); Described 30 coils (3) are connected to become three phase windings, and every have ten coils (3) mutually, and be four facies tracts by the circle distribution of laminated core (1); Described rotor comprises yoke cylinder (4) and magnetic steel ingot (5); The inner surface of described yoke cylinder (4) is fixed with 26 magnetic steel ingots (5); Described 26 magnetic steel ingots (5), after magnetizing, according to the S utmost point and N utmost point alternative arrangement, form 26 magnetic poles; Between the cylindrical of the tooth (2) of described magnetic steel ingot (5) and laminated core (1), keep a fixing air gap; Described yoke cylinder (4) is fixed on axle (6) by bearing.
2. a kind of brushless DC hub-motor according to claim 1 is characterized in that: the laminated core of described stator (1) forms by the silicon steel sheet punching is folded.
3. a kind of brushless DC hub-motor according to claim 1, it is characterized in that: the yoke cylinder (4) of described rotor is made by mild steel.
4. a kind of brushless DC hub-motor according to claim 1, it is characterized in that: the magnetic steel ingot of described rotor (5) is by being pasted and fixed on the inner surface of yoke cylinder (4).
5. a kind of brushless DC hub-motor according to claim 1, it is characterized in that: the magnetic steel ingot of described rotor (5) is made by NdFeB rear-earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202891213U CN203313025U (en) | 2013-05-23 | 2013-05-23 | Direct-current brushless hub motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202891213U CN203313025U (en) | 2013-05-23 | 2013-05-23 | Direct-current brushless hub motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203313025U true CN203313025U (en) | 2013-11-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202891213U Expired - Fee Related CN203313025U (en) | 2013-05-23 | 2013-05-23 | Direct-current brushless hub motor |
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| Country | Link |
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| CN (1) | CN203313025U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683781A (en) * | 2013-12-19 | 2014-03-26 | 郝敬春 | Integrated direct-current brushless motor of wheel hub |
| CN103683102A (en) * | 2013-12-10 | 2014-03-26 | 国家电网公司 | Electric control rope ladder head |
-
2013
- 2013-05-23 CN CN2013202891213U patent/CN203313025U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683102A (en) * | 2013-12-10 | 2014-03-26 | 国家电网公司 | Electric control rope ladder head |
| CN103683781A (en) * | 2013-12-19 | 2014-03-26 | 郝敬春 | Integrated direct-current brushless motor of wheel hub |
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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: 20131127 Termination date: 20150523 |
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| EXPY | Termination of patent right or utility model |