Patent ID: 9007040
Filing Date: 2015-04-14
Classification: H02M

Abstract:
1. A DC-DC power conversion apparatus including two or more switching units each of which includes two semiconductor switching elements Sa and Sb performing switching operations, which semiconductor switching elements of the respective switching units are all connected in series, an energy transition capacitor for conducting charging/discharging according to the switching operations of the respective semiconductor switching elements of the respective switching units, and an inductor, the DC-DC power conversion apparatus being characterized by comprising: a control unit that makes the semiconductor switching elements of the switching units execute switching operations in four types of switching modes, according to a ratio of input/output voltages of the DC-DC power conversion apparatus and a direction of power transmission in the DC-DC power conversion apparatus, and also makes the semiconductor switching elements carry out a current-discontinuing operation wherein a current flowing through the inductor becomes 0 during the switching operations under low load.