| 摘要 |
PURPOSE:To stably operate an inverter device by suppressing the jump of the DC output of a chopper circuit and hence the AC output voltage of an inverter circuit due to the delay in the operation of an output voltage control system at the time when a load is abruptly reduced. CONSTITUTION:A current variation detector 22 receives an input the output current detection signal 211 detected by an output current detecting converter 21, and outputs a detection signal 221 when the variation in the current becomes higher than the prescribed value. A timer circuit 23 using a monostable multivibrator is started by the detection signal 221, a stop command 232 is applied to a gate control circuit 15 for the prescribed time, and the operation of the chopper circuit 2 is stopped for the prescribed time. |
