Patent ID: 8634209

Claim:
A current-fed full-bridge DC-DC converter comprising: a current source circuit including: a direct-current voltage source circuit and a reactor connected to the direct-current voltage source circuit in series; an inverter circuit including a plurality of switching elements, input terminals and output terminals, wherein outputs of the current source circuit are connected to the input terminals of the inverter circuit; a transformer having a primary coil that is connected to the output terminals of the inverter circuit and a secondary coil; and a rectifier circuit which is connected to the secondary coil of the transformer and through which the current-fed full-bridge DC-DC converter generates direct-current output, wherein the current-fed full-bridge DC-DC converter further includes: a capacitor connected to the output terminal of the inverter circuit and the primary coil of the transformer in series; and a controller controlling on/off operations of the switching elements so that a current can flow from the current source circuit through the primary coil of the transformer and the capacitor in stopping of the current-fed full-bridge DC-DC converter.