关键词: 电励磁双凸极电机, 集成化驱动充电系统, 正波弦脉宽调制, 空间矢量脉宽调制, 联合仿真

Abstract:

The traction system of EVs could be reconfigured to be a battery-charging system, then the traditional on-board charger is saved and the high power charging capability could be realized. An integrated motor-driving and battery-charging system was studied based on the 12/10-pole doubly salient electromagnetic motor (DSEM). During the driving mode, the front-end DC/DC converter and the cascade inverter were employed to drive the DSEM. While in the charging mode, the three-phase windings could be exploited as the inductances of the three-phase rectifier, and the excitation windings could be the filter inductances of the front-end DC/DC converter. Due to the large and constant self-inductances of the armature windings and excitation windings, low current ripples could be achieved, and the charging efficiency could be high since tiny torque generates during the charging process. To the system, the element finite model of DSEM and the power system model were established by ANSYS and MATLAB software. Co-simulations based on SPWM and SVPWM were accomplished to demonstrate the current and the voltage characteristics of the charging mode, and the feasibility of the system was proved.

Key words: doubly salient electromagnetic motor (DSEM), integrated motor-driving and battery-charging system, sinusoidal pulse width modulation (SPWM), space vector pulse width modulation (SVPWM), co-simulations