| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a drive apparatus for a three-phase AC motor, which has small torque variation and high efficiency. <P>SOLUTION: The drive apparatus for a three-phase AC motor is provided with: a torque current conversion means for obtaining a vector current for outputting a request torque; a rotating angle detecting means for obtaining a rotating angle of the three-phase AC motor; a torque/current conversion means for indicating a vector current for obtaining the commanded torque based on the torque command and the rotating angle; a correction value output means for storing data indicating the corresponding relation between the set rotating angle and a torque ripple based on a maximum efficiency curve of the three-phase AC motor, obtaining a vector current for canceling the torque ripple, based on the torque command and the rotating angle detected by the rotating angle detecting means, and outputting the obtained vector current as a correction value; and a correcting means for correcting the vector current outputted from the torque current conversion means, based on the correction value outputted from the correction value output means, and outputting the corrected vector current. <P>COPYRIGHT: (C)2010,JPO&INPIT |
