| 摘要 |
PURPOSE:To simplify and miniaturize the whole of a device, by a method wherein the output DC current of a storage battery is changed so as to have a high frequency and the generating voltage of a reactor is boosted to supply the DC voltage of a high voltage to an inverter unit. CONSTITUTION:DC current, obtained by rectifying commercial AC current through a rectifying circuit 10 and smoothing it by a resistor 12 and a capacitor 11, is converted by a transistor 14 so as to have a high frequency while the voltage of high frequency, which is generated at the secondary side of an output transformer 13, is rectified and smoothed to output it to respective loads. When the supply of the commercial AC is interrupted, it is detected by a chopper control circuit 50, a high-frequency switching signal is outputted to a FET 46 and the output DC current of a storage battery 33 is supplied to an inverter unit 15 through a protecting fuse 40, a reactor 45, the FET 46 and a diode 47. A high frequency AC current, converted so as to have high frequency and generated at the secondary side of a transformer 13, is rectified and smoothed to supply it to respective loads. Accordingly, the loads may be driven even when the commercial AC power supply is interrupted. |
