| 摘要 |
PROBLEM TO BE SOLVED: To efficiently secure a starting-time control power source having a simple circuit configuration, suppressing inrush current to an electrolytic capacitor C6 which stores DC voltage, by supplying starting-time control power, and utilizing the inrush current in a power device which converts commercial voltage into DC voltage and supplies high-frequency voltage to a load using an inverter circuit 1. SOLUTION: The power device has the inverter circuit 1 which converts the output voltage of the electrolytic capacitor C6 for smoothing DC voltage obtained by rectifying AC of an AC power source E with a rectifier DB into high-frequency AC voltage by on/off operation of switching devices Q1, Q2, and supplies high-frequency power to a load side, and a control circuit 4 for on/off-controlling the switching devices Q1, Q2. An inductor L1 connected in series to the electrolytic capacitor C6 is provided with a secondary winding N2, and induced voltage generated in the secondary winding N2 of the inductor L1, when inrush current flows from the AC power source E into a series circuit of the electrolytic capacitor C6 and the inductor L1 when power is supplied, is used as a control power source for the control circuit 4 for the initial-stage of starting. |
