关键词: 永磁直流力矩电动机, 换向, 虚槽, 转矩波动, 抑制方法

Abstract: Torque ripple is one of the main factors affecting the stability and accuracy of output torque of permanent magnet DC torque motor. The mechanism of the torque ripple of the permanent magnet DC torque motor was analyzed, including the tooth groove torque ripple and electromagnetic torque ripple. In order to reduce the torque ripple under the electromagnetic torque ripple, measures such as virtual slots and increasing the number of commutation plates were adopted to reduce torque fluctuations. The actual test and analysis of the improved prototype showed that the torque ripple coefficient index was improved.

Key words: permanent magnet DC torque motor, commutation, virtual slot, torque ripple, suppression method