Switched reluctance motor torque control method and modular power converter thereof

The invention provides a switched reluctance motor torque control method and a modular power converter, the input of a rotating speed ring is a set reference rotating speed and a measured actual rotating speed, a rotating speed error is obtained, the rotating speed error is used as the input, and a total reference torque is obtained through PI control; the input of the torque ring is the total reference torque, the actual torque of each phase, the turn-on angle and the turn-off angle, and distributing the total reference torque to each phase by using a torque distribution function to obtain a phase reference torque; according to the numerical value relation between the phase reference torque and the actual torque of each phase, a pulse width modulation control signal is obtained through torque hysteresis, and the pulse width modulation control signal is applied to a corresponding switch tube in the modular power converter to complete control. On-line self-adjustment is carried out on an overlapping angle in a torque distribution function at each sampling moment, torque hysteresis is based on a pulse width modulation algorithm, pulse width modulation signals with different duty ratios and polarities are generated within a hysteresis limit, and free response is avoided.