emf method meaning in English

电动势法

Analysis of diode grid equilent impedance in waveguide using emf method
方法分析波导中二极管栅格的等效阻抗
Second , as currently study of hot point , back ? emf , it will discuss the principle of the sub - position examination in detail . based on the principle , it put forward a kind of improving back - emf method of crossing - zero checking turns position . but this did n ' t resolve to the root problem that the speed scope is very narrow and it need an in expiation of speed error and so on . thus it put forward a new improvement method at next chapter
其次,就目前所研究的热点? ?反电势法,详细讨论了其转子位置检测的原理,在此基础上提出了一种改进的反电势过零点检测方法,其可直接从电机端部得出反电势对地的电压值,而不是通过电机中心点电压来得到反电势。