Braking torque closed-loop control system and method for switch reluctance motor

A switched reluctance motor braking torque closed-loop control system, comprising:

• a low-speed torque regulator, a high-speed torque regulator, a mode selector, a current regulator, a first angle optimization controller, a second angle optimization controller and a torque estimator;
• the output end of the mode selector is connected to the input ends of the low-speed torque regulator and the high-speed torque regulator respectively, the output ends of the low-speed torque regulator and the high-speed torque regulator are connected to the input ends of the current regulator and the second angle optimization controller respectively, the output ends of the current regulator and the second angle optimization controller are connected to switched reluctance motor through an asymmetric half-bridge power converter, and the actual phase current i(t) signal of switched reluctance motor is connected to the input ends of the current regulator and the torque estimator respectively;
• the actual phase voltage u(t) signal of switched reluctance motor is connected to the input end of the torque estimator, and the output end of the torque estimator is fed back to the input end of the mode selector;
• the output end of the first angle optimization controller is connected to the input end of the current regulator, and the rotor position signals P, Q and R of switched reluctance motor are connected to the input ends of the current regulator, the second angle optimization controller and the mode selector respectively.