| 摘要 |
A voltage command generation unit generates a voltage command value, based on a current deviation relative to a current command value. A dq-axis voltage filter generates a voltage command value subjected to a filtering process for smoothing a change of the voltage command value in a time axis direction. Then, the voltage command value subjected to the filter processing is subjected to a voltage amplitude correcting process and a dq inverse transformation coordinate converting process, so that a phase voltage command for an AC motor is generated. Thus, it is possible to prevent both an amplitude and a phase of the voltage command for the AC motor from being changed rapidly even at a time of control mode switchover.
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