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。
For DC current measurement, a current shunt is place in series in the current path and convert the current to a 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。
Simultaneously, the second order notch filter and low-pass filter are designed to filter the second order rippled DC voltage signal.
为了给智能仪表提供廉价标准电流信号输出接口，可以使用RC低通滤波器，从PWM中分离出与占空比成正比的线性直流电压信号。
To provide intelligent instruments with the cheap interface of the standard current sign, the RC low pass filter is used for producing a voltage signal which is proportion to PWM's duty rate from PWM.
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。
For AC voltage measurement, an RMS converter circuit or a precision rectifier circuit convert the AC signal into a DC voltage.
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。
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.
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。
For example, in a system for measuring small DC voltages, the contact potential of the switch will be added to the signal.
并采用优化的SAPWM调制信号，提高了直流电压的利用率，并能有效地抑制逆变器输出的谐波电流。
Also, optimized SAPWM modulation wave has been utilized, improving the utility ratio of DC voltage and restraining effectively the output harmonic current of inverter.
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。
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.
直流电压在内置电路被转换交流载波信号，激励传感器的初级线圈，一个集成的解调放大。
The DC excitation is internally converted to an AC carrier signal which excites the transducer's primary coil.
直流电压在内置电路被转换交流载波信号，激励传感器的初级线圈，一个集成的解调放大。
The DC excitation is internally converted to an AC carrier signal which excites the transducer's primary coil.
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