Design of the control system for the charge-discharge device used for an electrically-driven automobile

Faced with the rapid development of the electrically-driven automobile, research on the intelligent charge-discharge device of the high-power battery is increasingly more important. A design of the charge-discharge device is proposed based on three-phase voltage source PWM convertor. The current control is based on the synchronous rotating frame to achieve decoupled current. The Space Vector PWM is used for the control system to get high voltage utilization ratio. The experimental result shows that the control system reaches the design requirements and has fast dynamic response, excellent steady-state performance, unity power factor and low harmonic content.