| 摘要 |
<P>PROBLEM TO BE SOLVED: To widen a controllable area of output torque of a motor capable of controlling variation suppressing torque when suppressing a periodic rotation speed variation due to periodic loads or the like. <P>SOLUTION: In the variation suppressing torque control, in order to suppress the variation of the angular speed ω or the like of a motor 5 by a compressor 6 to be the periodic load, the fundamental wave component of an angular acceleration α is extracted in a fundamental wave component extraction part 14, and an amplitude adjustment part 15 is operated on the basis of an adjustment command Ic*. A subtraction part 16 subtracts the output of the amplitude adjustment part 15 from an average current command Ia* and outputs an amplitude command Im*. In response to the fact that the maximum value of a voltage command V* reaches the upper limit value of the output voltage of an inverter 4, a current phase command generation part 19 advances a current phase command β*. <P>COPYRIGHT: (C)2012,JPO&INPIT |
