| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance the correction performance of an offset error which a current sensor has. <P>SOLUTION: The present invention provides an AC motor controller 10 which applies a multiphase AC voltage to a multiphase AC motor 90 for control. The AC motor controller 10 comprises: a current sensor 34; a control part 11 which generates a voltage command value of each phase for making a current of each phase follow up the current command value; a power amplification part 13 which applies a voltage of each phase to the multiphase AC motor in accordance with the voltage command value of each phase; a phase voltage offset correction part 17 which reduces a voltage offset value; and a phase current offset correction part 16 which reduces a current offset by correcting a current detection value of each phase. The AC motor controller 10 makes the phase voltage offset correction part 17 operate preferentially rather than the phase current offset correction part 16. <P>COPYRIGHT: (C)2012,JPO&INPIT |
