Patent ID: 8629661
Filing Date: 2014-01-14
Classification: H02M

Abstract:
1. A bidirectional DC-DC converter comprising: a first switching circuit configured to input electrical power from a first DC power supply, with which a first smoothing capacitor is connected in parallel, to an in-between terminal of DC terminals of the first switching circuit and to convert the electrical power to AC so as to supply the AC from an in-between terminal of AC terminals to a primary winding; a second switching circuit configured to input electrical power from a second DC power supply, with which a second smoothing capacitor is connected in parallel, to an in-between terminal of DC terminals of the second switching circuit and to convert the electrical power to AC so as to supply the AC from an in-between terminal of AC terminals to a secondary winding; a transformer which magnetically couples the primary winding to the secondary winding; and control means for controlling the first and second switching circuits so as to transfer electrical power between the first and second DC power supplies, wherein the first switching circuit includes: wherein an in-between point of both ends of the first switching leg is the in-between terminal of the DC terminals while an interval between a point at which the switching devices H wherein the second switching circuit is provided with a smoothing reactor to smooth electric, current flowed into the second DC power supply, said smoothing reactor being connected to between the secondary winding and the second smoothing capacitor, wherein the control means is provided with a mode A which keeps an ON state of the switching devices H