Switched reluctance motor efficient regenerative braking control method based on variable speed tracking

Abstract

The invention provides a switched reluctance motor efficient regenerative braking control method based on variable speed tracking, and the method comprises the steps: selecting n groups of braking rotating speeds and braking accelerated speeds at equal intervals in the change range of the braking rotating speeds and the braking accelerated speeds during the variable speed operation of a switched reluctance motor, respectively taking the initial given rotating speed and the given accelerated speed as initial given rotating speed and given accelerated speed when the switched reluctance motor is braked, obtaining an optimal opening angle, an optimal turn-off angle and an optimal commutation overlapping angle corresponding to the maximum braking energy feedback efficiency and the minimum braking torque pulsation coefficient, acquiring the braking rotating speed and accelerated speed when the switched reluctance motor is operated in real time after a function relation is obtained, and calculating the braking speed and the accelerated speed of the switched reluctance motor. The corresponding optimal turn-on angle, turn-off angle and commutation overlapping angle of the switched reluctance motor under the current braking rotating speed and acceleration can be obtained; a corresponding power switch of the switched reluctance motor is controlled, and the control target that the optimal regenerative braking efficiency and the minimum torque pulsation coefficient are obtained in the whole process under the time-varying braking given rotating speed of the switched reluctance motor based on the variable acceleration mode can be achieved.

Description

technical field [0001] The invention relates to the field of regenerative braking control of a switched reluctance motor, in particular to a high-efficiency regenerative braking control method of a switched reluctance motor based on variable speed tracking. Background technique [0002] Switched reluctance motors have been widely used in many fields such as electric vehicles, mining locomotives, etc. . However, in some application conditions that require frequent braking operation, the switched reluctance motor will generate a lot of energy loss due to frequent braking operation, which not only causes a great waste of energy, but also causes a lot of energy loss due to frequent braking. A large amount of energy consumption will greatly increase the temperature of the equipment and cause extremely adverse effects on its normal operation. Therefore, it is of great significance to carry out research on the regenerative braking control of switched reluctance motors. [0003] A...

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Problems solved by technology

However, in some application conditions that require frequent braking operation, the switched reluctance motor will generate a large amount of energy loss due to frequent braking operation, which not only causes a great waste of energy, but also causes frequent braking. A large amount of energy consumption will greatly increase the temperature of the equipment and will have an extremely adverse impact on its normal operation. Therefore, it is of great significance to carry out research on regenerative braking control of switched reluctance motors.

[0003] At present, a series of studies have been carried out on the regenerative braking control of switched reluctance motors at home and abroad, and the regenerative braking control methods such as the optimal regenerative braking efficiency and the maximum power recovery have been proposed, although all have achieved good results. effect, but the existing various control methods do not consider the control problem that the motor needs to accurately track its corresponding time-varying given speed during braking operation

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