| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inverter device wherein a smoothing means whose output voltage largely pulsates is used yet current distortion in a motor is suppressed. <P>SOLUTION: The inverter device includes a voltage command compensating means 11 that superposes a result obtained by the following processes on a voltage command value such that: the amplitude and phase of a frequency signal obtained by multiplying the product of the number of pole pairs of a motor 5 and the number of revolutions of the motor 5 by an integer are adjusted by the phase (actual number of revolutions) of the motor 5, a current command value, and the phase of the output voltage of the smoothing mean 3. Voltage command compensation including a phase computation error caused by a pulsating voltage is carried out, and the smooth driving of the motor 5 in which current distortion in the motor 5 is suppressed is thereby accomplished. Thus, current distortion in the motor 5 can be suppressed irrespective of pulsation in the output voltage of the smoothing means 3. <P>COPYRIGHT: (C)2007,JPO&INPIT |
