phase commutation造句

R . carlson etc . analysis of torque ripple due to phase commutation in brushless dc machines
张琛.直流无刷电动机原理及应用.北京:机械工业出版社, 1996
Abstract in this paper the phase commutation and current curves of brushless motor variable - speed system are studied . according to the results that the pulsating torque is influenced greatly by the ratio of the direct current supply voltage and the electromotive force of the motor , an approach to reduce the pulsating torque is presented
本文通过对无换向器电动机模型的换相过程和电流波形的研究，得到换相转矩波动受直流电源电压和电动机电动势幅值的比（ u / e ）的影响较大的结论并获取了最佳u / e ，同时通过仿真研究了电流波形，提出了减小转矩脉动的控制策略。
It's difficult to find phase commutation in a sentence. 用phase commutation造句挺难的