back emf

基本解释

The constitute of harmonic back EMF is analysed, the position detection circuit and the microcomputer control system of step motor is designed.
分析了谐波反电势信号的构成，设计了相应的位置信号检测电路及步进电动机的微机控制系统。
This paper analyzes the advantage of using sensorless brushless DC motor in fuzzy conversing air-condition, the back EMF method and the start technique.
介绍变频空调采用无传感器无刷直流电机作为压缩机的优越性，反电势检测的基本原理以及起动方法。
The magnetic network model of hybrid step motor is established according to the air gap late permeance method, and the expression of the harmonic back EMF is deduced.
利用气隙比磁导法建立了混合式步进电动机的磁网络模型，推导出谐波反电势的表达式。

For some who understand the biophysics of RF and EMF, going back to first principles provides a reality check on a possible threat from this low energy form of radiation.
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an electromagnetic force appearing in an inductive circuit in such a direction as to oppose any change of current in the circuit