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Four-segment winding motor switching system and switching method

A switching system, four-segment technology, applied in the field of four-segment winding motor switching system, to achieve the effect of small impact, small damage, and easy field weakening control

Pending Publication Date: 2022-02-08
西安清泰科新能源技术有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The object of the present invention is to provide a four-section winding motor switching system and a switching method to solve the various problems existing in the prior art in view of the above problems

Method used

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  • Four-segment winding motor switching system and switching method
  • Four-segment winding motor switching system and switching method
  • Four-segment winding motor switching system and switching method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as Figure 1~3As shown, a four-section winding motor switching system includes a motor controller 1, a stator winding 2, a switching circuit 3 and an absorption circuit 4; the motor controller 1 is connected to the stator winding 2 through a three-phase line, and the stator Each phase of the winding 2 includes four parts, respectively the first winding part 21, the second winding part 22, the third winding part 23 and the fourth winding part 24, each winding part is connected by a switching circuit 3, and the absorption The circuit 4 is connected to each switching circuit 3 respectively;

[0045] The switching circuit 3 includes a diode half-bridge circuit 31, a controllable switch half-bridge circuit 32, a first circuit 33 and a second circuit 34; the diode half-bridge circuit 31 is set to two, and the controllable switch half-bridge circuit 32 is set One; two diode half-bridge circuits 31 and a controllable switch half-bridge circuit 32 are arranged in parallel ...

Embodiment 2

[0065] Based on the above-mentioned embodiment 1, this solution provides a switching method of a four-section winding motor switching system, and the specific switching method is as follows:

[0066] When the motor running speed switches from the lowest speed to the highest speed:

[0067] When the motor runs in the low-speed range, the motor controller 1 sends an opening signal to the body switching circuit 3 connected to the rear end of the fourth winding part 24 while sending a PWM working signal to the main inverter circuit, so that A4, B4, C4 The lower end of the winding is short-circuited; at this time, all the windings are working, and the number of turns of each phase is W1+W2+W3+W4, which generates a large torque, and the maximum torque can reach T1;

[0068] As the running speed of the motor increases to n2, the motor controller 1 sends a signal to turn off the switching circuit 3 at the rear end of the fourth winding part 24, and a signal to turn on the switching ci...

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PUM

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Abstract

The invention discloses a four-segment winding motor switching system, which comprises a motor controller, a stator winding, a switching circuit and an absorption circuit. The motor controller is connected with the stator winding through a three-phase line, each phase of the stator winding comprises four parts, namely a first winding part, a second winding part, a third winding part and a fourth winding part, the winding parts are connected through the switching circuits, and the absorption circuit is connected with each switching circuit; and the motor is provided with four sections of windings, the effect of a four-gear gearbox can be achieved through switching of the four sections of windings, and the performance is improved compared with that of two-gear speed changing. The switching stage number is large, impact is small in the switching process, continuity is better, meanwhile, damage to all devices in the system is smaller, and the service life of the device can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of three-phase motors, in particular to a four-segment winding motor switching system and switching method. Background technique [0002] For electric vehicles, the performance requirements for the drive motor system are different under different working conditions. [0003] When the car starts to accelerate from zero speed / low speed, or starts on a slope, the vehicle speed or motor speed is relatively low at this time, but a large torque is needed to overcome the friction or the weight of the car itself. Motor torque is directly proportional to flux density, so a high flux density is required. [0004] When cruising at high speed, the system usually does not require high torque, but in order to make the car's drive motor operate more efficiently, it is desirable to reduce the magnetic flux density. In the high-speed region, the proportion of iron loss is high, and the iron loss is basically proportional t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/18H02P27/08H02M7/5387H02M1/32
CPCH02P25/18H02P27/085H02M7/5387H02M1/32
Inventor 曹先贵张磊汪家安杨瑞敏
Owner 西安清泰科新能源技术有限责任公司