| 摘要 |
<P>PROBLEM TO BE SOLVED: To restrain incorrect estimation of a disturbance component in switching of a carrier frequency and restrain deterioration of a current response characteristic. <P>SOLUTION: A controlling unit performs control operation with a cycle in conformity with a carrier frequency of a carrier, in particular, each timing of a ridge and a valley of the carrier. A disturbance estimation unit constituting the controlling unit, when the carrier frequency is switched, performs update of a control constant for disturbance estimation depending on a control operation cycle in control operation at one cycle later than control operation at the time when the carrier frequency is switched. <P>COPYRIGHT: (C)2012,JPO&INPIT |
