Patent ID: 9641089
Date: 2017-05-02
CPC Classifications: H02J,H02M,Y02B

Claim:
1. A DC-DC converter which performs bidirectional power transmission between a first DC power supply and a second DC power supply, the DC-DC converter comprising: a transformer; a first converter unit composed of a full-bridge circuit having two bridge circuits each having a plurality of semiconductor switching elements to each of which an antiparallel diode and a parallel capacitor are connected, the first converter unit being connected between the first DC power supply and a first winding of the transformer, and performing bidirectional power conversion between DC and AC; a second converter unit composed of a full-bridge circuit having two bridge circuits each having a plurality of semiconductor switching elements to each of which an antiparallel diode and a parallel capacitor are connected, the second converter unit being connected between the second DC power supply and a second winding of the transformer, and performing bidirectional power conversion between DC and AC; a first reactor and a second reactor connected on respective AC input/output lines of the first converter unit and the second converter unit; and a control circuit for drive-controlling each semiconductor switching element in the first converter unit and the second converter unit, thereby controlling the first converter unit and the second converter unit, wherein in first power transmission from the first DC power supply to the second DC: power supply, the control circuit in second power transmission from the second DC power supply to the first DC power supply, the control circuit