| 摘要 |
PURPOSE:To stably continue the operation of an inverter device even when an AC power source is instantaneously interrupted by supplying the charged energy of a condenser to a self-excited inverter when the AC power source is instantaneously interrupted. CONSTITUTION:When an AC power source 10 is normal, the power supply to a load 18 is performed through a variable DC converter 12, a smoothing circuit 14 and a self-excited inverter 16. At this time, a capacitor 34 is charged from the power source 10 to a constant voltage through a diode rectifier 36 and a resistor 38 in an instantaneous power interruption compensating circuit 30. When the power source 10 is instantaneously interrupted, the power supply to the inverter 16 and the load 18 is switched from the power source 10 side to the compensating circuit 30. |
