In a drive system of power transistor inverter-motor, not only can it be used in fine control of motor current waveform, phase, amplitude and frequency, but can also be used to sense, fault current.
在大功率晶体管逆变器——电动机驱动系统中，它不但可用来对电动机电流的波形、相位、幅值和频率进行精细控制，而且能快速地检测出故障电流。
The varying characteristics of motor current in vari-speed cutting are discussed in this paper.
本文就变速切削过程中电机电流的变化特征进行了较为系统的研究。
This paper describes the control of the motor current, velocity and position.
本文介绍了电机的电流、速度和位置控制。
The factors of antenna drive system affecting motor current characteristics are analysed.
分析了天线传动系统影响电机电流特性的因素。
Finally, the simple test system is designed, which actualizes the collection of the motor current data and automatic identification of the parameters.
最后，设计了无耦合条件下永磁直流电机参数简易测试系统。实现了电机电流的采集、处理及电机参数的自动辨识。
By calculating the parameters of a pumping unit's dual-winding motor current, power, efficiency in a campaign cycle can analyze its operating characteristic.
通过计算抽油机一个运动周期过程中双绕组电机的电流、功率、效率等参数可以分析其运行特性。
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。
On the basis of motor current, a new method for indirect force modeling with self organizing fuzzy neural network to overcome the faults of dynameters is developed.
针对测力仪所存在的问题，利用自组织模糊神经网络，提出了基于电机电流信号的间接力学建模的新方法。
It analyzes the technique of extracting the spindle motor current of the Machining Center, correspondingly, points out that Hall current sensor is a very efficient way.
对自由曲面数控加工中主轴电机电流信号的提取技术进行了分析，指出了霍尔电流传感器是行之有效的方法。
The significant factors which exert an influence on instantaneous fluctuation of motor current are in sequence :Vari-speed wave form, vari-speed amplitude and vari-speed frequency.
在变速参数中影响电机瞬时电流波动最为显著的因素依次为变速波形、变速幅度和变速频率。
The diameter of the impeller is reduced through cutting impeller to improve the factual performance, reduce noise and motor current, so that it can be run steadily for a long duration.
通过切削叶轮缩小叶轮直径，改变离心泵实际性能，降低噪音和电机电流达到稳定长周期运转的目的。
The breakdown of transmission shaft in the main drive system is due to too high roll torque. Overpower protection mode of motor current does not reflect the true dynamic character of roll torque.
轧制力矩过大是轧机主传动系统传动轴断裂的主要原因，传统的电机电流过载保护方式不能真实反映轧机主传动系统扭矩的动力学特性。
The theoretical analysis and experimental results demonstrate that the motor current has some fluctuation in vari-speed cutting process, but it is almost no effect on normal operation of machine tool.
理论分析和试验结果表明，采用变速切削加工时，电机瞬时电流确有一定程度的波动，但不影响机床电机的正常使用；
The theoretical analysis and experimental results demonstrate that the motor current has some fluctuation in vari-speed cutting process, but it is almost no effect on normal operation of machine tool.
理论分析和试验结果表明，采用变速切削加工时，电机瞬时电流确有一定程度的波动，但不影响机床电机的正常使用；
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