| 摘要 |
PROBLEM TO BE SOLVED: To prevent switching elements on both sides from being turned on simultaneously due to the recovery current of one parasitic diode. SOLUTION: In a power device provided with a smoothing capacitor C1, switching elements Q11, Q12 connected in series to both ends of this, a transformer T11 having a primary winding n1 whose right end is connected to a junction P1 side of these and a secondary winding n2 to which a load circuit 13 is connected, a capacitor whose both ends are connected to the lower end of the capacitor C1 and the left end of the primary winding n1 respectively, and a rectifier 12 whose both DC output terminals are connected to the lower end of the capacitor C1 and the left end of the primary winding n1 respectively, for rectifying an AC voltage from an AC power source 11 and for outputting a voltage obtained by this rectification between both DC output terminals, the capacitor C1 unit is composed of two capacitors C11 and C12 connected in series. Here, an inductance L2 is connected between the induction of these and the junction P1. |
