Patent ID: 8174849

Claim:
An electric power converter, comprising: a first series circuit including a reactor and a first switching device, and adapted to be connected between DC input terminals of a DC power supply; a second series circuit including a second switching device and an output capacitor having DC output terminals, and connected in parallel with the first switching device, a load being adapted to be connected in parallel with the output capacitor; a first capacitor arranged parallel to the first switching device; a transformer having a primary winding, and a secondary winding connected in parallel with the output capacitor; a third series circuit including a first diode, the primary winding of the transformer and a third switching device, and connected in parallel with the first switching device; a second capacitor arranged parallel to the second switching device; a fourth series circuit including, a fourth switching device, the primary winding and a second diode, and connected in parallel with the second switching device; a fifth series circuit including a third diode and the secondary winding of the transformer, and connected between the DC output terminals; and a voltage clamping device connected in parallel with the primary winding of the transformer.