| 摘要 |
PURPOSE:To provide a stabilized DC power source upon occurrence of overcurrent at the load side due to power interruption by obtaining control power source from the output of an inverter circuit upon interruption of AC input. CONSTITUTION:Upon interruption of AC input, power having voltage level to be determined by the peak output voltage of an inverter 103 is fed to a control power source circuit. Since the peak output voltage of generally employed PWM control inverter equals to DC input voltage of the inverter, power having potential to be determined by the voltage of a battery 106 is fed upon interruption of AC input. Since the voltage to be fed to the control power source is maintained at a level determined by DC input voltage of the inverter circuit 103 even upon occurrence of overcurrent at the load 105 side, DC power having stabilized voltage level can be fed to the control power source circuit. |
