| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve a means for suppressing low-frequency pulsation that occurs in motor current by feedback control applicable even with a modulation factor of 100%. <P>SOLUTION: The power conversion device includes: a direct-current power supply; a smoothing capacitor; a first power converter; an alternating-current motor; an alternating current detecting means; a first coordinate transformation means; and a first current controlling means. The power conversion device includes: a means for detecting a low-frequency component of an alternating current detection value detected by the alternating current detecting means; and a second current controlling means that operates alternating-current voltage output by the first power converter so that the low-frequency component of the alternating current detection value is zeroed. <P>COPYRIGHT: (C)2010,JPO&INPIT |
