| 摘要 |
PROBLEM TO BE SOLVED: To obtain a power converter capable of switching a bypass power supply and an inverter power supply without generating change in a load voltage, in an asynchronous state that both of the power supplies are not normally synchronized. SOLUTION: A switching judgment circuit 30 detects difference between a voltage of an inverter 2 from a voltage sensor 20 and a voltage of a bypass power supply 6 from a voltage sensor 21, and outputs a switching permission signal when the difference is in a specified range. When a switching command from a switching command generating circuit 22 and a switching permission signal from the switching judgment circuit 30 are inputted, a switching control circuit 23 sends an ON/OFF command signal to switches 4, 5 and executes switching from an inverter power supply to the bypass power supply. |
