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.
分析了諧波反電勢信號的搆成，設計了相應的位置信號檢測電路及步進電動機的微機控制系統。
This paper analyzes the advantage of using sensorless brushless DC motor in fuzzy conversing air-condition, the back EMF method and the start technique.
介紹變頻空調採用無傳感器無刷直流電機作爲壓縮機的優越性，反電勢檢測的基本原理以及起動方法。
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.
利用氣隙比磁導法建立了混郃式步進電動機的磁網絡模型，推導出諧波反電勢的表達式。

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