| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem where an offset current is allowed to flow in a motor, and a torque ripple is generated in the generation torque of the motor since the offset of a current control system cannot be corrected by a fixed amount of correction when the offset of the current control system is changed by temperature or the like. SOLUTION: This torque ripple-reducing device is equipped with a first operation part 51 that calculates the total sum of the product of a torque command for each period of the electric angle of a motor and sin (θ deg.-0 deg.), a second operation part 512 that calculates the total sum of the product of the torque command for each period of the electric angle of the motor and sin (θdeg.-120 deg.), and an update judgment part 54 that judges whether the amount of correction is to be updated or not according to the speed signal of one period of the electric angle of the motor and the torque command, first and second update value decision parts 521 and 522 that decide a value for updating the amount of correction based on the result of the first and second operation parts, and first and second amount-of-correction update parts 531 and 532 that add the value of the update value decision parts 1 and 2 to the amount of correction based on the judgment of the update judgment part 54. |
