Switched reluctance motor fuzzy adaptive control system and method

Abstract

The invention discloses a switched reluctance motor fuzzy adaptive control system and method. The system comprises a fuzzy adaptive fractional PI controller, a PWM module, an asymmetric half-bridge drive circuit, a switched reluctance motor, a position detection module, a current detection module, a torque calculation module and a rotation speed detection module. The method comprises the steps: input parameters are sent to the fuzzy controller for fuzzification and the output dynamic parameters are used as the input of the fractional PI controller, and then the parameters are adjusted and inputted to the controlled object for control; amplitude limiting calculation of the torque error of the switched reluctance motor is performed to obtain the duty cycle of PWM output pulse, the working region of each phase winding is judged according to the rotor position angle, and the switching state of the asymmetric half-bridge drive circuit is determined by the PWM direct torque control algorithm; and the motor operation is controlled by adjusting the voltage of each phase winding. The system and the method are simple and reliable and have high robustness and realizes reasonable adjustment ofthe motor speed and improves the dynamic operation performance of the system.

Description

technical field [0001] The invention relates to the technical field of switched reluctance motor control, in particular to a fuzzy adaptive control system and method for switched reluctance motors. Background technique [0002] At present, the hysteresis control method is generally used in the direct torque control control strategy of the switched reluctance motor. The control method is characterized by a simple algorithm and a wide range of applications. However, the hysteresis control method has certain requirements for the design of the hysteresis limit. If the hysteresis limit is set small, the torque response will be fast, which will easily cause shock to the system; if the hysteresis limit is set large, the purpose of optimizing torque ripple will not be achieved, and the system response will slow down. Therefore, the hysteresis control strategy is not the best choice. At the same time, there are torque and speed double closed loops in the direct instantaneous torque...

AI Technical Summary

Problems solved by technology

In terms of controller selection, in order to easily realize the speed adjustment, the PID controller is usually used to act in the speed outer loop of the control system, but its control accuracy is not very high, and excessive overshoot often occurs, and the resistance Insufficient ability to interfere with the outside world

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