| 摘要 |
PURPOSE:To prevent an excess current from flowing to a switch and an excess load from being applied to a compressor by switching a switch connected to an AC power source and a switch connected to a DC power source in a no current state, and stopping An inverter when a DC voltage value exceeds a predetermined value. CONSTITUTION:When a DC power source 3 is not started, its state is judged by a controller 11 to close a switch 2. In this case, the output of an AC power source 1 is supplied to an inverter 6 through a power reactor 5. When the power source 3 is started in this state, the inverter 6 is stopped by the controller 11. After the switch 2 is opened, a switch 4 is closed to supply the output of the power source 3 to the inverter 6. On the other hand, when the detected value of current detector 12, the inverter 6 is stopped. |
