Variable Winding Analysis and Optimization of Dual-mode Starter-Generator for Micro HEV Applications

摘要

To satisfy the requirement of high torque in starting state and accurate voltage regulation in generating state, a Dual-Mode Starter Generator (DMSG) with variable winding is proposed in this paper. Firstly, the influence of winding parameters on the performance of DMSG is analyzed by establishing the mathematical model of equivalent turns. Next, the cause of circulating current in starting state is analyzed. In order to solve the problem of circulating current between parallel branches, this paper presents a method that adding directional diode in main power circuit. The correctness of this method is verified by simulation. Then, the optimal matching relationship between the field winding and armature winding with multi-objective optimization is determined. At last, the FEA and prototype experiments verify the feasibility and performance of starter mode and generator mode of the DMSG.