KR100263558B1 - Muti-variable speed motor for electric vehicle - Google Patents

Abstract

PURPOSE: A multi-transmission motor for an electric vehicle is provided to improve a transmission efficiency of the electric vehicle by reducing a power lose in changing the speed of vehicle. CONSTITUTION: The multi-transmission motor for an electric vehicle includes stator(11) installed in a housing(10) and a rotor(13) installed at inner space(12) of the stator(11) to be rotated. A coils part(20) is winded on either the stator(11) or the rotor(13). A commutators part(15) selectively and variably provides electric current to the coil(20). The electric power is provided to the commutators part(15) through a brush part. A controlling part(18) controls the current based on a torque and a rotational speed of the rotor(13) thereby to be progressively, variably and selectively provided to the brush part.

Description

Multi-speed electric motor of electric vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-speed electric motor of an electric vehicle, and in particular, a plurality of coil parts having different pole numbers, commutator parts respectively connected thereto, and the commutator connected to each other so as to enable efficient shifting without a separate transmission in the electric vehicle. It is equipped with a control unit for supplying a variable selection of current to the unit, and exhibits a torque exceeding the maximum static friction when the vehicle starts.In driving, low speed, medium speed, and high speed light are divided into modes, and a plurality of coil parts having different poles are used. The present invention relates to a device that can perform a shift in an electric vehicle quickly and efficiently by supplying a variable selective current to each connected commutator.

And the prior art which concerns on the shift of an electric vehicle has the following, for example.

(1) Accelerator for electric vehicles: Domestic Patent Publication No. 96-29138 ⇒ It relates to the connection and acceleration of electric vehicles through the shaft and flexible coupling of potentiometer, variable resistor.

(2) Accelerator for electric vehicles: Korean Utility Model Publication No. 96-1007 ⇒Regarding an accelerator in which a variable resistance plate is coupled to an accelerator of an electric vehicle.

(3) Gear shifting device for electric vehicles: Korean Utility Model Publication No. 96-21270 ⇒ It relates to gear shifting device for electric vehicles.

(4) Continuously variable transmissions operated by small DC motors. Korean Utility Model Publication No. 96-14959, which relates to continuously variable transmissions that are shifted by DC motors.

(5) Electric Vehicle Accelerators: Korean Utility Model Publication No. 95-17801 ⇒It relates to an accelerator which drives an electric motor in proportion to the amount of pressure of the accelerator pedal.

In the conventional electric vehicle acceleration device described above, since a separate transmission is installed, control and acceleration of the proper speed cannot be easily performed, and a load is generated due to the use of the transmission, causing loss of power. It became.

In addition, there is a problem that fuel economy is lowered due to an increase in weight and volume due to installation of a transmission.

Accordingly, the present invention has been made to solve the above problems, and includes a plurality of coil parts having different pole numbers, a commutator part connected to each other, and a control part for selectively and selectively supplying current to the commutator part. By varying the torque and the number of revolutions of the motor according to the present invention to provide a shift of the electric vehicle itself.

1 is a perspective view illustrating the structure of a multiple speed motor of an electric vehicle according to the present invention.

2 is a perspective view illustrating a coil wound to have different pole ratios in FIG. 1.

3 is another embodiment of FIG.

4 is another embodiment of FIG.

* Explanation of symbols for main parts of the drawings

10 housing 11 stator (permanent magnet or magnetic coil)

12: internal space 13: rotor

15: commutator part 15-a: first commutator

15-b: second commutator 15-c: third commutator

16: brush portion 16-a: first brush

16-b: second brush 16-c: third brush

17: end plate 18: control unit

20: coil portion 20-a: first coil

20-b: second coil 20-c: third coil

Multi-variable electric motor of the present invention electric vehicle for achieving the above object in the multi-speed electric motor of the electric vehicle for shifting at the start and unwinding of the vehicle, the rotor 13 is configured to have different pole number and number of turns to the electric motor Or a stator 11; A coil unit 20 having different numbers of turns and poles wound around the rotor 13 and the stator 11 of the electric motor; A commutator unit 15 for supplying current to the coil unit 20; A brush unit 16 for supplying current to the commutator unit 15; And a control unit 18 for sequentially supplying, varying, and selectively supplying current to the brush unit 16.

Therefore, it is designed to enable efficient operation of the electric vehicle without installing a separate transmission by installing a multi-speed electric motor of the present invention electric vehicle.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view illustrating the structure of a multi-speed motor of an electric vehicle according to the present invention, and FIG. 2 is a perspective view illustrating coils wound to have different pole ratios in FIG. 1.

Referring to the drawings, the current applied by the speed of the electric vehicle recognized by the controller 18 of the electric vehicle multi-variable electric motor according to the present invention and the resulting load is the first brush (16-a), the second brush ( 16-b), the third brush (16-c) optionally supplied with the first commutator (15-a), the second commutator (15-b), the third commutator (15-c), and the commutator portion 15 The current is variably and selectively supplied to the first coil 20-a, the second coil 20-b, the third coil 20-c, and the like, each having a different pole ratio.

Referring to each configuration and operation of the multi-speed electric motor of the electric vehicle according to the present invention as follows.

First, the multi-variable electric motor of the electric vehicle according to the present invention includes a stator 11 and an inner space 12 of the stator 11 which are composed of permanent magnets or magnetic coils inside the housing 10 which is an AC and DC motor main body. The commutator part 15 which variably and selectively supplies current to the coil part 20 and the coil part 20 wound so as to have a constant pole ratio in the rotor 13 and the rotor 13 or the stator 11 rotating in the And a brush unit 16 which mediates current to the commutator unit 15, and a controller 18 which supplies a current selectively and selectively based on the torque (rotation power) and the rotation speed of the motor. do. The control unit 18 supplies current to the coil unit 20 wound around the stator 11 or the rotor 13 via the commutator unit 15 and the brush unit 16 in a variable and selective manner, thereby providing torque (rotation power) of the motor and Can change the speed of rotation.

According to the embodiment of the motor, if the number of commutator pieces of the first commutator 15-a is 12 in the commutator part 15 (basically, the number of slots is 12), the number of slots in each of 12 slots If the first coil 20-a is wound and the commutator convenience of the second commutator 15-b is 6, the two coils 20-a are regarded as one slot and have six poles. b) is wound, and if the commutator bias number of the third commutator 15-c is 4, the coil is wound so that three slits are regarded as one slot and have four pole rolls.

In the commutator section 15, three commutators and the coil section 20 connected thereto are described, but the number of commutators and the corresponding coil sections are exemplary, but the present invention is not limited thereto.

On the other hand, the power is applied to the first commutator 15-a having the largest number of commutator conveniences in the commutator section at the time of reverse driving of the vehicle and the departure of the vehicle.

This is because the number of slots connected to each of the first commutator 15-a is greater than the number of slots of the second commutator 15-b and the third commutator 15-c, correspondingly to the torque (rotation power) of the motor itself. The pulsation is also relatively small, and accordingly, it can exhibit relatively smooth rotational characteristics.In addition, when the vehicle is gradually driven at a high speed, the rectifier part 15 has a small number of commutator biases, so that a gradual current is applied. Since the number of slots according to the present invention is gradually reduced to a smaller number, the rotational angular velocity W according to one rotation of the rotor is gradually increased so that the rotation speed N is increased, and the output torque Ta is relatively decreased.

The number of commutator pieces and slots formed in each commutator described above may be formed to have various numbers of frames.

Therefore, the number of commutators, brushes, and coils in the commutator part 15, the brush part 16, and the coil part 20 described above are exemplary, but are not intended to limit the present invention.

3 and 4 illustrate an example in which a coil unit 20 is provided in a stator unit in a brushless motor according to the present invention.

In the multi-variable electric motor of the electric vehicle according to the present invention configured as described above, a current is applied to the commutator having a large number of commutator conveniences at the start and the back of the vehicle, and the commutator has a small number of commutator conveniences as the vehicle's speed gradually progresses. Since the power is applied to the vehicle, it is possible to produce a relatively large rotational torque that exceeds the maximum static friction force of the vehicle at the start and the reverse of the vehicle (the rotational angular velocity according to the rotation of the rotor is relatively low, The output torque increases relatively.) The higher the speed of the vehicle, the lower the torque and the greater the number of revolutions that can exceed the maximum motion friction. The angular velocity becomes relatively large and the output torque decreases relatively.)

Therefore, by appropriately setting the number of commutators, the number of commutators, the number of slots, and the number of turns and the number of poles of the coil wound around the slot, the rotation torque and the number of revolutions in the same motor can be used for use of the transmission in the operation of an electric vehicle. Since the load can be reduced, the overall efficiency of the electric vehicle can be improved, and a constant voltage applied from the control unit 18 is selectively and variably applied to the commutator unit 15 through the brush unit 16. Since the voltage applied from the commutator section 15 is selectively and variably contacted with the coil section 20, the rotation torque and the rotation speed can be changed even with the same voltage.

Claims (2)

A multi-speed motor of an electric vehicle, comprising: a rotor configured to have different pole numbers and turns of the motor; A coil unit having a different number of turns and poles wound around the rotor of the electric motor; A commutator section for supplying current to each of the coil sections having different turns and poles; A brush unit for supplying current to the commutator unit; And a control unit for sequentially supplying, varying, and selectively supplying current to the brush unit. A multi-speed motor of an electric vehicle, comprising: a stator configured to have different pole numbers and turns of the motor; A coil unit having a different number of turns and poles wound around the stator of the electric motor; And a control unit for sequentially supplying, varying and selectively supplying current to the coil unit.

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