在转子的转动的同时获取在每相线圈的反电动势。
As the rotor moves, the back-EMF is acquired in each phase of the coil.
采用连续脉冲-示波器法测定电解过程的反电动势。
The back EMF in the process of electrolysis is measured by continuous pulse-oscillograph.
对于在电源故障情况下的电力，可利用主轴电机的反电动势。
For the power in case of a power failure, back electromotive force of a spindle motor can be utilized.
设计了一种新的软硬件相结合的方法去检测反电动势过零点。
Firstly, a new zero-crossing detection method with software comparing with hardware is designed.
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。
At startup, there is no back-EMF due to the stationary motor, and the motor position cannot be detected in sensorless mode.
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。
The "Back-EMF" method is the simplest and most popular method for detecting the rotor position in trapezoidal brushless dc motor.
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。
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.
因此，在不减小反电动势的情况下减小了顿转扭矩和噪音，由此获得高效率。
Accordingly, a cogging torque and noise are reduced without reducing a back-electromotive force, thereby obtaining a high efficiency.
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。
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.
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。
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.
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。
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.
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。
Detecting back EMF is one of the most important methods for the detection of rotor position in square wave current drive BLDCM sensorless control.
首先搭建了试验平台，对电机进行了参数调节，测试了轮毂电机的反电动势、转矩和NT曲线。
At first we established a test platform, making parameters adjustment of the electric machinery, testing In-Wheel-Motor back electromotive force, torque and the nt curve.
针对这种反电动势波形偏离理想波形的情况，本文提出了一种最优电流跟踪法来抑制转矩脉动。
Aiming to minimize the torque ripple in condition of non-perfect BEMF waveform, the dissertation present a optimum current tracking control technique.
包括带A/D转换器的单片机及取自电动机定子绕组的反电动势的三个转子磁钢位置传感器信号。
The utility model comprises a SCM provided with A/D convertor and 3 rotor magnet steel position sensor signals taken from the counter electromotive force of the motor rotor winding.
在此基础上，仿真了空载和负载下的电机反电动势，并且对不同磁钢尺寸下的定位力矩进行了分析计算。
On this basis, back electromotive force without load and with load is researched, simulated and analyzed, and cogging torque is analyzed and calculated in different dimensions of magnetic steel.
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。
Using Back-EMF method to control BLDCM, it can realize sensor-free control method by detecting the zero point of EMF in this paper.
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。
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.
在分析和研究龙门刨(B2 0 12a)原控制系统的基础上，设计了龙门刨床反电动势反馈控制系统。
Base on the analysis and research of the original control system of double housing planer (B2012A), designed a opposing electromotance feedback control system.
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。
In this paper the common methods of sensorless control of BLDCM are introduced, and the principle of back-EMF method is illustrated in detail.
分析了影响同步电动机矢量控制电流控制环动态特性的主要因素，指出同步电动机反电动势是其中最重要的干扰因素。
F(electromotiveforce) of synchronous motor is the most important interference, the general PI(proportion integration)current regulator does not retrain the effect of E.
冲击检出电路(104)的冲击检出电阻(141、143)，检测出受到冲击后产生的步进电机(105)的反电动势。
Impact detecting resistors (141), (143) of an impact detecting circuit (104) detect a counter electromotive force of a step motor (105) generated due to an impact.
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。
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.
通过对硬盘主轴马达的反电动势与马达转速之间关系的分析，提出一种利用马达的反电动势信号跟踪马达转动速度变化，产生系统伺服写入时钟信号的方法。
By analyzing relation between BEMF of the hard disk spindle motor and the rotate speed. This paper presents a new method of following the motor rotate speed by PLL to lock BEMF.
通过对硬盘主轴马达的反电动势与马达转速之间关系的分析，提出一种利用马达的反电动势信号跟踪马达转动速度变化，产生系统伺服写入时钟信号的方法。
By analyzing relation between BEMF of the hard disk spindle motor and the rotate speed. This paper presents a new method of following the motor rotate speed by PLL to lock BEMF.
应用推荐