For DC current measurement, a current shunt is place in series in the current path and convert the current to a DC voltage signal.
对于直流电流测量﹐在电流通道串联一电流分流器﹐将电流转换成直流电压信号。
Simultaneously, the second order notch filter and low-pass filter are designed to filter the second order rippled DC voltage signal.
同时，设计了用于牵引逆变器控制的二次数字陷波器以及低通滤波器滤除直流电压信号的二次脉动。
For capacitive sensing, driving signal with DC bias voltage and ac voltage is usually necessary for the measurement of capacitance.
对电容式加速度计，为测量其电容的变化，通常需要带直流偏置的交流电压信号来驱动。
For AC voltage measurement, an RMS converter circuit or a precision rectifier circuit convert the AC signal into a DC voltage.
对于交流电压测量﹐利用有效值转换电路或精密整流器电路将交流信号转换成直流电压。
By comparing the heating effect of an unknown AC signal to that from a known DC reference, metrologists can determine the RMS AC quantity (voltage or current) in terms of the DC quantity.
为了对比一个已知直流参考的未知交流信号热效应，计量人员可以确定在一段时间内直流的交流有效值(电压或电流)。
If the AC voltage at the input is large, part of this signal is rectified, producing an error in the DC signal being measured.
如果输入端的交流电压很大，其一部分信号被整流，于是在被测的直流信号中产生了误差。
Feedforward signal includes the information of both grid voltage and DC side load. Power balance between the input and output can be maintained by adjusting AC side currents.
前馈信号同时包含了电网电压和负载的信息，通过快速调节交流侧进线电流，使得系统功率平衡得以维持。
In general, tachometer generators are eliminated in the small and medium power DC rotating speed governing systems, and armature voltage is used as motor speed signal.
在中小型直流调速系统中，一般都取消了测速发电机，而以电枢电压作为电机转速信号。
MSP430F449 has abundant internal resource, but itself 12 b A/DC negative pole reference voltage can′t be lower than 0V. It has brought the difficulty in measuring alternating current signal.
MSP430F449单片机内部资源丰富，但是他本身自带的12位A/DC参考电压中的负极最低不能小于0V电压，对于交流信号的测量带来了困难。
It can also be used to measure the AC voltage signal with superimposed DC component.
能测量含有直流分量的交流电压信号。
Subsequently, a novel controller for DC bus voltage regulation is put forward according to the small signal model based on the instantaneous power balance in AC and DC sides of three-phase SAPF.
然后根据交流侧和直流侧的功率平衡方程，推导了电压环的小信号模型。最后基于该模型设计了一种高动态性能的直流电压调节器。
The voltage signal can be changed into a lot of wave forms such as pulse wave, delta wave, DC signal.
电压信号可根据需要设置成脉冲波、三角波、直流等不同信号类型。
In this paper the small signal model following the DC-link of the traction converter system is established and the mechanism of DC-link voltage and current oscillation is analyzed in detail.
本文建立地铁牵引变流器关注直流侧的系统小信号模型，详细分析直流侧振荡的产生机理。
In this paper the small signal model following the DC-link of the traction converter system is established and the mechanism of DC-link voltage and current oscillation is analyzed in detail.
本文建立地铁牵引变流器关注直流侧的系统小信号模型，详细分析直流侧振荡的产生机理。
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