Patent ID: 7276884

Claim:
A DC/DC converter for supplying power in both directions between a first DC power supply and a second DC power supply, comprising: a first transformer having a primary winding including a first winding and a second winding and having a secondary winding; a second transformer having a primary winding including a first winding and a second winding and having a secondary winding; a second switch connected to both ends of a series circuit to which the first DC power supply, a first switch, and the first winding of the first transformer are serially connected; a fourth switch connected to both ends of a series circuit to which the first DC power supply, a third switch, and the first winding of the second transformer are serially connected; a first series circuit being connected to both ends of the second switch and including the second winding of the first transformer and the second DC power supply; a second series circuit being connected to both ends of the fourth switch and including the second winding of the second transformer and the second DC power supply; a reactor being connected to both ends of a series circuit to which the secondary winding of the first transformer and the secondary winding of the second transformer are serially connected; and a control circuit configured to turn ON/OFF the first switch and the third switch with a phase difference of a half cycle, turn ON/OFF the second switch and the fourth switch with a phase difference of the half cycle, and thereby supply power in both direction between the first DC power supply and the second DC power supply.