一种新型电动汽车复合电源电路设计

A new circuit design of hybrid power supply for EV

利用超级电容和蓄电池组成电动汽车的复合电源,设计了一种仅采用单个高频电力电子器件的电机传动主电路的新型拓扑结构。所设计电路不仅能对超级电容进行升压变换,与蓄电池协同向电机供电,而且能够在电动汽车再生制动过程中将发电电压升压后对超级电容充电。主电路结构和控制简单,变流装置成本低,工作可靠。实验验证了该电路能够提高电动汽车的性能和能源利用效率。

The hybrid power supply of electric vehicles （EV） was composed of the super capacitor and battery. Applying only one high frequency power electronic device, a new circuit topology of main power circuit was proposed based on operating charactedstics of EV＇s driving system. The circuit boosts auxiliary power supply （APS） to power up the motor together with the main battery, The circuit also recharges APS via boosting output voltage during regenerative braking, Low-cost and long-reliability are guaranteed by structure simplicity and control convenience of the main circuit. Expedments prove the circuit is effective to improve energy efficiency and performance of EV.