| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power conversion device that allows reducing the operation loss of circuit elements and allows achieving high conversion efficiency. <P>SOLUTION: In a DC-DC converter 10 that is provided with a filter circuit 14 having a smoothing reactor Lb and a smoothing capacitor Cb at a subsequent stage of a rectifier circuit 13 on a secondary side of an insulating transformer 12, a resonant capacitor Cx is connected in series between a secondary-side coil 12b of the insulating transformer 12 and the rectifier circuit 13. An inverter circuit 11 on a primary side is composed of a half-bridge circuit having switching elements SW1 and SW2, a switching operation is performed at a switching frequency in response to a resonant frequency of the smoothing reactor Lb of the filter circuit 14 and the resonant capacitor Cx. <P>COPYRIGHT: (C)2013,JPO&INPIT |
