For the problem of signal current bypass with track circuit of rolling stock depot in DC electric traction sections, the paper provides measures to prevent it.
针对直流电力牵引区段车辆段轨道电路中的信号电流存在的迂回问题，提出了在工程设计中的防范措施。
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。
Some manufacturers, while using the 5-Pin XLR, decided to use fourth and fifth pins for DC power, not signal data as specified in the standard.
有些厂家虽然使用了5针XLR，但是他们却利用引脚4和引脚5来传输直流电，而本标准并没有这样规定。
It also conducts the signal (it doesn't conduct DC), and is often used at other points in a circuit where the signal needs to travel between two different DC voltages.
同时它也能引导信号(但不引导直流电)，它也经常被用在电路里的信号需要跨越两个不同直流电压之间的地方。
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。
Discusses the problems existing in the door motor of elevator, puts forward the system project which takes DSP digital signal processing technology as core, DC brushless motor as driver.
探讨了目前电梯门机系统存在的问题，提出了应用DSP数字信号处理技术为核心，无刷直流电机为驱动机的系统方案。
The decaying DC component in the sampling signal will bring errors to the full-wave Fourier algorithm, which is derived with periodic signal.
全波傅氏算法是基于周期信号推导出来的，当采样信号中含有衰减直流分量时，将会产生误差。
Fast Fourier transform (FFT) is the main algorithm for harmonic analysis in electric power system, but when there is the decaying DC component in input signal, FFT algorithm will have higher error.
快速傅里叶变换(FFT)是电力系统进行谐波分析的主要算法，但当输入信号中含有衰减直流分量时，FFT算法会产生较大的误差。
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。
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。
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 signal flowgraph method is extended to ihe analysis of switching Dc-To-Dc-converters and the PWM signal switches emerging in the flowgraph are linearized.
本文把信号流图法推广到解直流开关电源电路、提出了作开关电源电路PWM开关信号流图的方法。
The real-time signal acquisition with AC-sampling technology overcomes the short comings of bad stability and big error in DC-sampling.
由于采用交流采样技术，实现了信号的实时采集，克服了直流采样误差大和稳定性差的缺点。
For example, in a system for measuring small DC voltages, the contact potential of the switch will be added to the signal.
例如，在测量小直流电压的系统中，开关的接触电势将会被叠加到信号上。
CPLD is employed to deal with the brushless DC motor's rotor position signal in order to realize.
CPLD实现无刷直流电机的转子位置信号的逻辑换相。
We can "ignore" this overall downward trend in the same way engineers remove a DC bias from a signal.
我们可以“忽略”这一总体下降的趋势，就像工程师从一个信号中删除直流偏置一样。
Normal mode noise is detected as a peak noise or deviation in a DC signal.
如图1 - 5所示，串模噪声是叠加到希望的输入信号上的误差信号。
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。
应用推荐