| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a torque ripple reducing device capable of automatically adjusting a gain of a detected current value for unifying a current amplitude, and reducing torque ripple generated by a motor when the current amplitude in respective phases varies. <P>SOLUTION: This torque ripple reducing device comprises a computing part 51 which divides a total sum of product of a torque command 62 in one cycle of an electrical angle of a motor 1 and sin (2θ° + 60° ) by a mean torque in the one cycle of the electrical angle; an updating judgment part 54 which judges whether an adjustment amount is to be updated or not based on a speed signal 61 and the torque command 62 in one frequency of the electrical angle of the motor 1; an updating value determining part 52 which determines a value for updating an adjustment amount based on the result of the computing part 51; an adjustment amount updating part 53 which updates the adjustment amount corresponding to the result of the updating value deciding part 52, based on the judgment by the updating judgment part 54; and first and second gain adjustment parts 411, 412 which adjust the gain of the current detection value, based on the result of the adjustment amount updating part 53 in a motor control device. <P>COPYRIGHT: (C)2004,JPO |
