electromagnet theory meaning in Chinese

电磁理论

Stepping drive of synchronous motors , upgrading the design idea of stepping motors from combined electromagnet theory to rotary magnetic field theory , will make the capability and efficiency of the increment control system improved to a new level , which is the research purpose of ac step motion drive this paper begins with the direct torque control method for pmsm to expatiate ac step motion control theory distinctly
用同步电动机实现步进传动；将步进电动机的设计思想从组合电磁铁理论提高为旋转磁场，使增量运动系统的容量和效率发展到一个新的水平，这就是交流步进传动的研究目的。为了比较清楚地阐述交流步进理论，本文首先从永磁同步电动机的直接转矩控制算法入手来分析。