| 摘要 |
<p>A compensation method and a compensation device for a permanent magnet motor. The compensation method comprises: S1, detecting response current of the permanent magnet motor, and calculating rotor speeds and load signals of the permanent magnet motor according to the response current; S2, detecting torque cycles of the permanent magnet motor if the rotor speeds are lower than preset speeds; S3, calculating loading torque fluctuation ranges in the torque cycles according to the load signals; and S4, when deviation values of the loading torque fluctuation ranges and rotor motor torque fluctuation ranges exceed preset threshold values, calculating the compensating voltage for a rotor Q axle according to the deviation values of the average values and the actual values of the loading torque fluctuation ranges, and adding the compensating voltage into each torque cycle. According to torque change rules of the permanent magnet motor load in each mechanical rotation cycle, torque compensating signals are fed forwardly to a torque ring, so that torque changes can be adjusted timely, speed is stabled and vibration is reduced.</p> |
