The back EMF in the process of electrolysis is measured by continuous pulse-oscillograph.
采用连续脉冲-示波器法测定电解过程的反电动势。
The back EMF SMO is designed according to sliding variable structure principle and PMSM mathematic model.
结合滑模变结构原理及永磁同步电机数学模型，对滑模观测器进行设计。
In this paper, the closed-loop control method of hybrid step motor using the harmonic back EMF is investigated.
研究了利用谐波反电势信号实现混合式步进电动机闭环控制的方法。
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。
Detecting back EMF is one of the most important methods for the detection of rotor position in square wave current drive BLDCM sensorless control.
方波电流驱动的BLDC电机无位置传感器控制检测转子位置的最重要方法是反电动势检测法。
The technique of back EMF induction in BLDC motor is analyzed, the "virtual neutral point" method and the technique of "3-step" start are introduced.
主要分析了反电动势感应方法，并阐述了虚拟中点法和三段式起动技术。
This paper analyzes the advantage of using sensor2 less 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 the BLDCM which has a sinusoidal back EMF, this paper presents a self-synchronous SVPWM control method using six discrete position signals for minimizing torque ripple.
本文对于反电动势波形接近正弦的永磁无刷直流电动机，提出一种基于六个离散位置信号的自同步svpwm控制方法，用于抑制电磁转矩脉动。
Compensation feedback flux was automatically adjusted through a proportional-integral (PI) regulator by checking the perpendicular degree of flux vector with back EMF vector.
通过检测反电势和磁链的正交程度来自动调节磁链补偿程度，以获得磁链的精确观测值。
On this base, the closed - loop control method of hybrid step motor using the harmonic back EMF is investigated, and the microcomputer control system of step motor is designed.
在此基础上研究了利用谐波反电势信号实现混合式步进电动机闭环控制的方法，设计了步进电动机的微机控制系统。
The application of the technology of back EMF induction in BLDC are analyzed by introducing the IC ML4428. The calculation formulas of some important parameters are shown behind.
通过对ML4428的介绍，分析了反电势感应技术在无刷直流电机中的应用，并给出了其中一些重要参数的计算方法。
In this paper, the magnetic network model of hybrid step motor is established according to the air gap rate 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，推导出谐波反电动势的表达式。
A novel method that USES the harmonic back EMF signal to extract the rotor position is put forward, and a new position sensor merged into an organic whole with the motor is designed.
提出了一种利用谐波反电势信号实现电机转子位置检测的新方法，设计了与电机一体化的新型位置传感器。
It is not possible to turn back the clock, but it is possible to provide EMF protection for ourselves and our children.
这是不可能的时钟倒转，但它可能提供电磁场保护我们自己和我们的孩子。
At startup, there is no back-EMF due to the stationary motor, and the motor position cannot be detected in sensorless mode.
在启动时，没有反电动势，在无传感器模式下电机的位置不能检测到。
Description: A system whereby the target's EMF is monitored remotely and EEG results fed back to them (or others) to mimic emotional patterns; eg. Fear, anger etc.
描述：一种系统，借此目标的电动势被远程监控和脑电波结果被反馈给他们（或其他人）模拟情绪方式，例如。害怕，生气等。
For some operating conditions, a synchronous generator with a rectifier and back-EMF load maybe exhibit low-frequency oscillations when the system parameters do not match.
同步发电机整流带反电动势负载时，当系统参数不匹配，在一定工况下，可能出现低频振荡。
In this paper the common methods of sensorless control of BLDCM are introduced, and the principle of back-EMF method is illustrated in detail.
论文在介绍常用的无位置传感器无刷直流电机控制方法的基础上，详细分析了“反电动势法”无刷直流电机控制原理。
The "Back-EMF" method is the simplest and most popular method for detecting the rotor position in trapezoidal brushless dc motor.
反电动势法是检测无刷直流电机转子位置用的最简单、最常用的方法。
One kind of sensorless control system for brushless DC motor based on DSP was introduced and the principle of back-EMF zero-crossing detection and realization method was discussed in detail.
介绍了反电动势过零位置检测的原理及实现方法，并采用了数字式转速、电流双闭环控制。
Using Back-EMF method to control BLDCM, it can realize sensor-free control method by detecting the zero point of EMF in this paper.
本文采用反电动法控制永磁直流无刷电机，是通过检测反电动势过零点获得转子位置实现无传感器控制。
As the rotor moves, the back-EMF is acquired in each phase of the coil.
在转子的转动的同时获取在每相线圈的反电动势。
A more accurate estimate expression is obtained by testing the curve of DC motor internal resistance and back-EMF coefficient which changes with the motor current.
通过测试直流电机内阻和反电动势系数随电机电流的变化曲线，从而得到电机转速更精确的估计表达式。
Using the motor control special chip ML4428, the counter electromotive force detection and back-EMF commutation were realized.
所设计的无刷直流电机稳速控制系统用电机控制专用芯片ML4428实现了反电势的检测、换相和功率驱动；
There are a number of ways to reduce harmful exposure to EMF. Some are as easy as standing back from an appliance when it is in use.
EMF可降低有很多来自不同方向的辐射，当处于使用状态时一些来自影响区背面的也是很容易测到的。
There are a number of ways to reduce harmful exposure to EMF. Some are as easy as standing back from an appliance when it is in use.
EMF可降低有很多来自不同方向的辐射，当处于使用状态时一些来自影响区背面的也是很容易测到的。
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