Torque ripple suppression device and method for switched reluctance motor

The invention provides a torque ripple suppression device and method for a switched reluctance motor. The method comprises the following steps: obtaining the actual current value of each phase of the motor and the absolute position of a rotor; obtaining a feedback torque value of each phase according to the obtained phase current and the absolute position of the rotor; setting a turn-on angle, a turn-off angle and a commutation overlap angle according to the obtained rotor absolute position and motor characteristics, establishing a cosine type torque distribution function, and performing online optimization on the cosine type torque distribution function according to an error coefficient alpha k; multiplying the on-line optimized cosine torque distribution function of each phase by the reference torque to obtain the reference torque of each phase; the motor is controlled through a switching signal, so that the actual phase torque can track the reference phase torque in time, and the control of the motor is co