In this paper, two types of main power circuits and their control methods are introduced when constructing active power filter in three phase four wire system.
本文介绍了在实现三相四线制有源电力滤波器时所采用的两种不同的主电路结构及其控制方法。
Another improvement, by the famed inventor Thomas Alva Edison (1847-1931) in 1874, was the Quadruplex system, which allowed for four messages to be transmitted simultaneously using the same wire.
另一项技术进步——四路系统，由著名发明家托马斯·阿尔瓦·爱迪生(Thomas Alva Edison, 1847- 1931)于1874年发明，它可以使四条信息在同一条电报线上同时传送。
In 1874 he invented and sold to Western Union a system by which four messages could be sent over one wire at the same time, two in each direction.
1874年他发明并售给西联电讯公司一种装置，用了它可以在一根电线上拍发四份电报，即从每一方向可同时拍发两份电报。
The solar cell module adopts four-wire connection. It uses high-speed data acquisition system. It ensures the accuracy of the current measurements of the solar cell.
太阳电池组件采用四线连接，以及高速数据采集系统，确保了太阳电池电流测量的准确性。
To improve the defects of traditional Four-Wheel-Steering system yaw rate feedback control strategy of Four-Wheel-Steer-by-Wire system was researched.
为了改善传统四轮转向系统的不足，研究了四轮线控转向系统的横摆角速度反馈控制策略。
A new DSP based hybrid power filter designed under the condition of three-phase four-wire system is presented.
介绍了一种基于DSP的三相四线制系统混合型电力滤波装置。
The measurement system should allow for a four-wire measurement to be made.
测量系统应该支持四线测量模式。
Then, we will present an instance about the modeling system of wire netting in Chapter Four, which is based on component technology.
在第四章节本文给出了基于组件技术实现的电网建模系统的实例。
Moreover, three-phase four-wire active filters can suppress zero line current, and solve symmetric problem of system effectively.
另外，三相四线制有源电力滤波器能有效地抑制零线电流，并能有效地解决系统的不对称问题。
This paper presented the design idea of control system of a fully automatic four - wire feeding machine and gave the design principles diagram of software and hardware design.
本文提出了全自动四线喂线机控制系统的设计思路，给出了软件设计和硬件设计原理图。
The experimental results indicate that this method can be used to detect the reactive power and harmonic current exactly in three-phase four-wire system.
通过试验验证，该检测方法能够很好的实现对三相四线制系统中的无功和谐波电流的检测。
Four - point suspending wire rope for driving system, stable movement and ensure the operate safety.
设备升降系统采用钢丝绳四点吊挂式，运行平稳可靠、噪音低。
First of all, current detection method for three-phase four-wire system is researched.
首先，本文针对三相四线制的电流检测方法进行了研究。
RLF4-series four-splitting brass wire clip is used for the connection of in-wire and brand wire in one-house one meter system.
系列四分流铜线卡用于一户一表工程电力进户线与分支导线的连接。
Wire feeder of four drive roll system is controlled bu welding power source with the advantages of stable feed speed, good start and brake characteristics, easy to move.
采用四轮驱动送丝机，受焊接电源控制，送丝稳定，启动，制动良好，维护方便。
Wire feeder of four drive roll system is controlled bu welding power source with the advantages of stable feed speed, good start and brake characteristics, easy to move.
采用四轮驱动送丝机，受焊接电源控制，送丝稳定，启动，制动良好，维护方便。
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