A Quick Efficiency-Optimized Scheme for Vector Controlled Permanent Magnet Synchronous Motor Drive

In view of the operation characters of permanent magnet synchronous motor (PMSM) for hybrid electric vehicle (HEV) application, efficiency optimization control strategy is needed to meet the demand of rapidity. A quick efficiency optimized vector control scheme is presented in this paper. In steady state, the initial value of d-axis current can be achieved in any constant speed and torque operating point by loss model, and optimized through the gradient search technique and the golden section technique. Once the motor running in a dynamic process, fast dynamic response control scheme will be activated. Results of simulations and experiments are provided to demonstrate the effectiveness of the proposed method.