根据超低频电压信号测量的特点，给出了一种精密测量电路。
The paper introduces the precise measuring circuit of ultra-low frequency voltage based on the characteristics of the measurement of ULF.
当CP脉冲为低频时，各相绕组平均电压和平均电流较低，电动机磁场储能较少，一定程度上克服了共振现象。
When the frequency of CP pulses is lower, average voltages and currents of windings will decrease and magnetic field energy of motor is very little so as not to produce resonance.
进行系统低频减载方案设计时，简单的频率响应模型由于未考虑系统电压对频率过程的影响而导致不少情况下无法适用。
During the design of under frequency load shedding (UFLS) schemes, some simple models for frequency dynamics analysis are obviously inadequate since they do not take system voltage into account.
该控制器以PM U得到的区域间电压相角差信号作为输入信号，能够直接有效地反映区域间低频振荡特性。
This controller's input signal is the voltage phase Angle difference between two areas obtained by PMU, which can effectively reflect the inter-area low frequency oscillation characteristics.
调频调压的配合考虑了低频时电压补偿的问题。
In coordination of ranging frequency and voltage, voltage compensation of low frequency is considered.
矿井提升绞车在计算低频制动电压时，通常采用低频最大力矩是平均力矩1.25倍的折算系数。
We usually take the coefficient 1.25 times the average torque as the low frequency maximum torque to calculate the low frequency braking voltage.
为了实现控制的方法，电感两端电压的低频内容的数学模型。
In order to realize the control method, the mathematical model of inductor voltage low frequency content is set up.
主回路采用由18个晶闸管组成的三相零式电路，并辅以晶闸管的保护电路，通过控制可以得到低频正弦波的电压（电流）输出；
The main circuit is consisted of 18 thyristors circuit and protection circuit. With the help of control subsystem, it can get the output of low frequency voltage (current) with the shape of sine wave;
最后，对变频调速电机的实际低频与中频电压、电流信号进行了分析，得出了正确结果，验证了该方法的有效性。
In the final, process the actual test low frequency and middle-frequency electric voltage and current data, attains the accurate result and verifies the accuracy of the method.
恒频脉宽调制细分驱动器比常见的直流电压斩波驱动器具有明显的优越性，不仅能够显著改善低频稳定性和高频矩频特性，而且能够有效地利用能量。
Not only has it improves the stability in low frequency and the torque-speed characteristic in high frequency of the stepping motor, and can utilize energy availably.
针对开关动态对节点电压采样值的干扰，引入带通滤波，滤除高频动态的同时避免了常规低频滤波的延时。
Band pass filter is adopted to remove the high -frequency switching disturbance in node voltage measurements and avoid the time delay of common low pass filter.
该圆环阵具有低频、宽带、高发送电压响应和大工作深度等优点。
The ring array has the advantages of low frequency, wide band, high transmissi…
该圆环阵具有低频、宽带、高发送电压响应和大工作深度等优点。
The ring array has the advantages of low frequency, wide band, high transmissi…
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