Research on development of the high-frequency power conversion system that can decrease current ripple and application to battery charge system

在对电动汽车的电池(锂离子电池)进行充电的情况下，需要减小充电电流中包含的电流纹波。虽然使用质量电解电容器可以减小电流纹波，但增加了电池充电器的成本和体积。本研究采用高频交流链式DC-DC转换器作为蓄电池充电器，并提出了一种新的控制方案。介绍了采用该方法减小电解电容器容量的效果。

In the case of charging the battery(Lithium-ion battery) of the electric vehicle, it is necessary to decrease the current ripple included in charging current. Though the current ripple can be decreased by using the mass electrolytic capacitor, the cost and the volume of the battery charger is raised. In this research, a high-frequency AC link DC-DC converter is used as the battery charger and new control scheme is proposed for this DC-DC converter. The effect of the decrease of the capacity of the electrolytic capacitor by using the proposal method is described.