| 摘要 |
PROBLEM TO BE SOLVED: To provide an inverter device that allows safely turning off a switch circuit configured by MOSFETs even if a short-circuit current flows into an inverter circuit.SOLUTION: A switch circuit connected between a DC power supply and an inverter circuit is configured so that two N-channel semiconductor switching elements are connected in series in the reverse direction. A control circuit outputs a control signal for controlling the switching of the inverter circuit, stops the output of the control signal when an operating condition is met to cause all the switching elements constituting the inverter circuit to turn off, and performs a protective operation that turns off the switch circuit. In the protective operation, the control circuit turns off the switch circuit after stopping the output of the control signal to the inverter circuit. |
