A novel speed control of hybrid excitation synchronous motor based on anti-windup of current regulator

Based on further research on the mathematical model of a non-salient pole hybrid excitation synchronous motor (HESM), this paper proposes a novel speed control strategy. According to the different running state of the motor, this control system can automatically, smoothly and steadily switch between the strategies of copper minimum, constant torque and maximum power output by field current compensation and q-axis current switching point. The core controller of the field current compensation is a current regulator which can regulate the field current by anti-windup of current. Meanwhile, the q-axis current switching point is set in consideration of the voltage limitation. Simulation and experimental results verify the correctness and feasibility of the proposed method.