CN201805294U - Direct-current brushless motor with series-parallel three-phase double winding structure - Google Patents
Direct-current brushless motor with series-parallel three-phase double winding structure Download PDFInfo
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- CN201805294U CN201805294U CN2010205062482U CN201020506248U CN201805294U CN 201805294 U CN201805294 U CN 201805294U CN 2010205062482 U CN2010205062482 U CN 2010205062482U CN 201020506248 U CN201020506248 U CN 201020506248U CN 201805294 U CN201805294 U CN 201805294U
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Abstract
The utility model relates to a direct-current brushless motor with a series-parallel three-phase double winding structure, which belongs to a direct-current brushless motor used for an electric vehicle. The direct-current brushless motor comprises stators and is characterized in that the stators adopts split stators, and stator windings adopt two sets of independent windings of high-speed main windings connected in parallel and low-speed auxiliary windings connected in series. Compared with the prior art, the direct-current brushless motor has the advantages that the high-speed main windings and the low-speed auxiliary windings are manually switched by stimulating the shifted gear of an ordinary vehicle, so that not only the efficient driving of the vehicle on a flat road at a high speed is ensured, but also the vehicle has larger start torque and higher climbing ability; the functions of two single-winding motors are fulfilled on the same motor; and meanwhile, the direct-current brushless motor is convenient for technological operation, achieves the high total coil space factor (up to 82-85 percent) of the motor, effectively reduces the copper loss of the motor and improves the operating efficiency of the motor under the conditions of the high-speed and the low-speed windings.
Description
Technical field
Series-parallel three-phase double-winding structure DC Brushless Motor belongs to the used for electric vehicle DC Brushless Motor.
Background technology
Along with the continuous development and application of China's clean energy resource, China pure electric automobile market is also more and more hotter, in case the relevant policies of country are put into effect, pure electric automobile market has a big eruptive growth.The two class motors of the general use of pure electric automobile now: brush series machine and brshless DC motor are arranged.Because there are all drawbacks of wear of brush in brush motor, increasing electric automobile producer begins to adopt the direct powered vehicle of brushless DC motor to advance.This type of direct-driving type electric automobile is no problem on level road or during road in easy flights, but when automobile is climbed, also needs motor that nominal load 3-5 can be provided doubly above torque.This have when both having needed vehicle on level road, to travel high efficiency again vehicle when going up a slope, can have very big overload capacity, this causes electric automobile failure when 20% half way up the mountain starting examination well beyond the performance requirement of general brushless electric machine.
The utility model content
The technical problems to be solved in the utility model is: overcome the problem that prior art exists, provide a kind of and can solve the series-parallel three-phase double-winding structure DC Brushless Motor that the starting of electric automobile half way up the mountain and automobile are climbed steeper this difficult problem that is short of power when sloping.
The technical scheme that its technical problem that solves the utility model adopts is: this series-parallel three-phase double-winding structure DC Brushless Motor, comprise stator, it is characterized in that: stator is split type, and stator winding is the high speed main winding of multi-channel parallel and the auxilliary winding two cover independent winding of low speed of series connection.
Two cover independent winding of stator are to be wound on the high speed main winding of three tunnel parallel connections in the stator slot and the auxilliary winding of low speed of one tunnel series connection.
The maximum way of the high speed main winding of described parallel connection is the greatest common divisor of number of poles and groove number.
Described high speed main winding is 6 utmost points, 9 grooves 3 tunnel.
The high speed main winding is the little moment coefficient of high speed; The auxilliary winding of low speed is the low speed high torque coefficient, and the auxilliary winding speed ratio of described high speed main winding and low speed is generally 1: 2.5-3, the gearshift by the simulation general-utility car is assisted winding to the high speed main winding of motor and low speed and is switched.
Described high speed main winding is 6 utmost points, 9 grooves 3 tunnel, and one tunnel series connection is adopted in the auxilliary winding coiling of low speed, and the series connection of 1-4-7 bag head and the tail is the A phase, and B, C are mutually identical with A; Three tunnel parallel connections are adopted in the coiling of high speed main winding, and the parallel connection of 1-4-7 bag head end is the A phase, and B, C are mutually identical with A.
We know that the most of the time of automobile travels on smooth road, thus motor in electric automobile 80%-90% time service at a high speed, little torque condition.Therefore when the design motor, we are designed to high speed, little moment coefficient with main winding; Auxilliary design of Windings is low speed, big moment coefficient.Gearshift by the simulation general-utility car is carried out manual switchover to the high speed main winding of motor and the auxilliary winding of low speed, promptly guaranteed automobile on level road at a high speed, high efficiency travelling, make automobile have bigger starting torque and climbing capacity again.
But the stator punching of general common electric machine all is an integral type open slot structure, and groove area is less, and adopts traditional wire insertion technology copper factor the highest at 75-78%.If adopt the double winding scheme can bring the sectional area of two cover windings too small to the unitary stator structure, copper loss is excessive during the motor operation, and efficient is lower, even can't reach the efficient of brush motor.Therefore, we have adopted stator separating, the groove of remaining silent is realized this structure of double winding, and we have also adopted the method for centralized winding to carry out manufacturing and designing of double-winding motor simultaneously.The employing of this kind structure makes our total copper factor can reach 82-85%, effectively reduces the motor copper loss, has improved the operational efficiency of motor when the high, low speed winding.
Principle is as follows:
If motor pole number is P, the groove number is Q, and its common divisor has N1, and N2... (establishing its greatest common divisor is N) holds the lead that sectional area is V at most in each groove.At first take the mode of element connected in series for the low speed winding, establishing the series connection winding is the conductor of single sectional area S1, the E circle, if winding mode be two layer winding then its total sectional area that accounts in the groove be V1=2*E*S1.At this, the 0.6-0.7 that we are controlled at gross area V in the groove with V1 doubly about (because the low speed winding only just can use in upgrade in starting or greater than 10%, so service time and frequency are less, it is higher a little than high speed winding that current density can be done, and this numerical value of the many persons of way is got big value).We establish high speed winding in parallel is the conductor of single sectional area S2, the F circle, then two layer winding then its total sectional area that accounts in the groove be V2=2*F*S2 (design of electrical motor is the about 2.5-3 of high, low speed speed ratio, so high speed umber of turn F=E*2.5-3/N).There is common divisor to exist again between the number of poles of motor and the groove number, so its parallel branch number can be divided into the N road at most greater than 1.Therefore we distribute to the high speed winding with the doubly total groove area V of remaining 0.3-0.4, and take the parallel connection of N road, the electric current born of the every road of high speed winding only has the 1/N of total current like this, the total sectional area that is equivalent to high speed winding under electric current and low speed winding same case has improved N doubly, reaches V2=(0.3-0.4) * N*V.We are by taking series-parallel mode like this, are equivalent to make the winding total sectional area behind the series and parallel to reach V3=V1+V2*N=(0.6-0.7) * V+ (0.3-0.4) * N*V=V* (0.6-0.7+N*0.3-0.4).From then on we can see when a way N is 3 the road or 4 the tunnel in the formula, V3 ≈ 2*V.Suppose N=3, V2=1.2*V then, and V1=0.6*V, V3=1.8*V, the current density ratio low speed winding current density that promptly is equivalent to high speed winding under same electric current is little 2 times, the copper loss when greatly reducing the motor high-speed cruising; In like manner suppose N=4, V2=1.2*V then, and V1=0.7*V, V3=1.9*V.
Compared with prior art, the beneficial effect that the series-parallel three-phase double-winding structure of the utility model DC Brushless Motor is had is: the gearshift by the simulation general-utility car is carried out manual switchover to the high speed main winding of motor and the auxilliary winding of low speed, promptly guaranteed automobile high speed, high efficiency travelling on level road, made automobile have bigger starting torque and climbing capacity again.On same motor, realized the function of two simplex winding motors.Have the technological operation of being convenient to simultaneously, the total copper factor of motor can reach 82-85%, effectively reduces the motor copper loss, has improved the advantages such as operational efficiency of motor when the high, low speed winding.
Description of drawings
Fig. 1 is a winding diagram of taking the auxilliary winding of low speed of series system;
Fig. 2 is a winding diagram of taking the high speed main winding of parallel way;
Fig. 3 is that the split type stator core three that winds the auxilliary winding of series connection low speed of bag earlier connects bag;
Fig. 4 is the split type stator core of the main winding of coiling high speed again on the auxilliary winding basis of the low speed that coiling finishes;
Fig. 5 is motor and controller, three whole winding diagrams that the single-pole double throw relay links to each other.
Fig. 1-the 5th, most preferred embodiment of the present utility model.Wherein: A, B, C are three phase windings.
Embodiment
Below in conjunction with accompanying drawing 1-5 series-parallel three-phase double-winding structure DC Brushless Motor of the present utility model is described further:
Shown in Fig. 1-4:
Because the high speed main winding number of turn is less, be the mode of three tunnel parallel connections to the high speed design of Windings, and around electromagnetic wire more, line footpath is thicker, as long as sense of current maintenance is identical in the groove of the sense of current that makes high speed main winding in each groove and the auxilliary winding of series connection low speed.By two cover windings in the groove are carried out the series and parallel design respectively, the cross section of having realized the auxilliary winding of sectional area ratio series connection low speed of the auxilliary winding parallel high-speed main winding under the situation that respectively accounts for half groove area of high speed main winding and low speed has increased 3 times, the number of turn be equivalent to connect 3 times of winding.The rated speed that has so just reached the high speed winding is higher 3 times than low speed winding, and the moment coefficient of the auxilliary winding of low speed is higher 3 times than high speed main winding, has realized can climbing and running purpose at a high speed.
With 6 utmost points, 9 groove structure model machines is example:
As shown in Figure 1:
The auxilliary winding of low speed adopts the mode of one tunnel series connection to wind the line, and the series connection of 1-4-7 bag head and the tail is the A phase, and B, C are mutually identical with A, is designed to half of groove area that the winding sectional area occupies a groove.The mode of one tunnel series connection coiling has reduced the pad quantity between the stator line bag by single stator core is turned to San Lianbao, makes the production efficiency of whole stator and reliability of technology that very big improvement all arranged.
As shown in Figure 2:
The winding diagram of high speed main winding, adopt the mode 1-4-7 bag head end parallel connection of 3 tunnel parallel connections to be the A phase, B, C are mutually identical with A, can make the winding wire of each stator line bag directly keep basic identical with the auxilliary winding of low speed like this, have increased 3 times but the parallel connection of high speed main winding is equivalent to the sectional area of winding later on.After adopting this kind winding method in parallel, bag carries out with the mode that need adopt welding that connects between the bag.
As shown in Figure 5:
When relay contact connection stator high speed main winding A, B, C phase time, electric automobile is the level road high-speed travel state; When electric automobile starting or climb steeper when sloping the high speed main winding in a single day can't provide essential torque, can use high low speed driving switch with the manual switchover of high speed main winding to the auxilliary winding of the low speed of high pulling torque, promptly allow relay be connected to A ', B ', C ' phase.When switching, intelligent within 200 milliseconds, power supply temporarily being disconnected of electric machine controller meeting, relay just can move then, switches, so greatly the contact endurance of protection relay.The motor speed that switches to behind the auxilliary winding of low speed can drop to about the 40-20% of high speed main winding, like this motor under identical electric current, will offer automobile than high speed main winding the big 3-5 of torque doubly, thoroughly solve the be short of power problem of automobile when climbing.
In like manner, when electric automobile in case starting finish or climb successfully enter flat road surface after, can simulate gearshift and motor being switched back the high speed main winding by the auxilliary winding of low speed by the hand switch control relay, automobile just can be run at high speed again like this.
By adopting the stator double-winding structure, make our same motor can have two kinds of different working regions and operating characteristic: at a high speed, efficiency operation district and low speed high torque service area.
Following table is the comparison in each side such as torque, efficient of the motor of the motor that adopts the stator separating double-winding structure and simplex winding:
As can be seen from the above table: after adopting high low speed double winding on the split type stator punching, only increased by 9 kilograms weight, overall cost has risen about 500 yuan, just in the function that has realized two simplex winding motors on same the motor: efficient was higher when both having had in high speed, very big torque output is arranged when also reaching climbing simultaneously, thereby thoroughly solve the half way up the mountain starting problem of the pure electric automobile of no gearbox.
As required, the high speed main winding can also be designed to 8 utmost points, 24 grooves 4 road or 2 tunnel, 8 utmost points, 36 grooves 4 road or 2 tunnel, 8 utmost points, 48 grooves 8 tunnel, 2 road or 4 tunnel; 16 utmost points, 72 grooves 8 tunnel, 2 road or 4 tunnel etc.
The above, it only is preferred embodiment of the present utility model, be not to be the restriction of the utility model being made other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection range of technical solutions of the utility model according to technical spirit of the present utility model.
Claims (6)
1. series-parallel three-phase double-winding structure DC Brushless Motor comprises stator, it is characterized in that: stator is split type, and stator winding is the high speed main winding of multi-channel parallel and the auxilliary winding two cover independent winding of low speed of series connection.
2. series-parallel three-phase double-winding structure DC Brushless Motor according to claim 1 is characterized in that: two cover independent winding of stator are to be wound on the high speed main winding of three tunnel parallel connections in the stator slot and the auxilliary winding of low speed of one tunnel series connection.
3. series-parallel three-phase double-winding structure DC Brushless Motor according to claim 1 and 2 is characterized in that: the maximum way of the high speed main winding of described parallel connection is the greatest common divisor of number of poles and groove number.
4. series-parallel three-phase double-winding structure DC Brushless Motor according to claim 3 is characterized in that: described high speed main winding is 6 utmost points, 9 grooves 3 tunnel.
5. series-parallel three-phase double-winding structure DC Brushless Motor according to claim 2, it is characterized in that: the auxilliary winding speed ratio of described high speed main winding and low speed is 1: 2.5-3, the gearshift by the simulation general-utility car is switched the high speed main winding and the auxilliary winding of low speed of motor.
6. series-parallel three-phase double-winding structure DC Brushless Motor according to claim 4, it is characterized in that: described high speed main winding is 3 tunnel parallel connections of 6 utmost points, 9 grooves, one tunnel series connection is adopted in the auxilliary winding coiling of low speed, the series connection of 1-4-7 bag head and the tail is the A phase, three tunnel parallel connections are adopted in the coiling of high speed main winding, and the parallel connection of 1-4-7 bag head end is the A phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205062482U CN201805294U (en) | 2010-08-24 | 2010-08-24 | Direct-current brushless motor with series-parallel three-phase double winding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205062482U CN201805294U (en) | 2010-08-24 | 2010-08-24 | Direct-current brushless motor with series-parallel three-phase double winding structure |
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| Publication Number | Publication Date |
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| CN201805294U true CN201805294U (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205062482U Expired - Fee Related CN201805294U (en) | 2010-08-24 | 2010-08-24 | Direct-current brushless motor with series-parallel three-phase double winding structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303159A (en) * | 2013-05-09 | 2013-09-18 | 常州迈控智能科技有限公司 | Electric automobile controller and dual-driving control method thereof |
| CN106712356A (en) * | 2016-12-20 | 2017-05-24 | 福建大酉新能源电机科技股份有限公司 | Automobile motor multi-contact array stator |
-
2010
- 2010-08-24 CN CN2010205062482U patent/CN201805294U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103303159A (en) * | 2013-05-09 | 2013-09-18 | 常州迈控智能科技有限公司 | Electric automobile controller and dual-driving control method thereof |
| CN103303159B (en) * | 2013-05-09 | 2015-07-29 | 常州迈控智能科技有限公司 | Electric vehicle controller and Dual Drive control method thereof |
| CN106712356A (en) * | 2016-12-20 | 2017-05-24 | 福建大酉新能源电机科技股份有限公司 | Automobile motor multi-contact array stator |
| CN106712356B (en) * | 2016-12-20 | 2023-08-18 | 福建大酉新能源电机科技股份有限公司 | Multi-contact array stator of automobile motor |
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| 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: 20110420 Termination date: 20150824 |
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| EXPY | Termination of patent right or utility model |