| 摘要 |
<p>There are included a VVVF inverter (1) that exchanges powers with an AC rotating machine; a voltage detector (16) that detects voltage information of the DC side of the inverter (1); a current detector (3) that detects current information of the AC side of the inverter (1); an inverter power instructor (20) that decides an inverter power instruction value in accordance with the detected voltage information; a real inverter power calculator (19) that calculates, based on the detected current information, a real inverter power value; a secondary magnetic flux instruction calculator (18) that calculates, based on a difference between the inverter power instruction value and the real inverter power value, a secondary magnetic flux instruction value for the AC rotating machine; a given secondary magnetic flux instructor (23) that outputs a given secondary magnetic flux instruction value to the AC rotating machine; and a secondary magnetic flux instruction switcher (24) that selects, as a secondary magnetic flux instruction value to be used for controlling the AC rotating machine via the inverter (1), either the secondary magnetic flux instruction value from the secondary magnetic flux instruction calculator (18) or the given secondary magnetic flux instruction value from the given secondary magnetic flux instructor (23).</p> |
