| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve stable motor operation by suppressing an influence of torque ripple resulting from a magnetic structure of a motor onto a power supply harmonic. <P>SOLUTION: A control circuit (5) changes a command frequency when the generation period of torque ripple resulting from the magnetic structure of a motor (7) synchronizes with a half as many as the power cycle of an AC power supply (6). <P>COPYRIGHT: (C)2012,JPO&INPIT |
