尽管四线电路的绝对成本高于双线电路，但它显著地改进了性能。
Although the absolute cost of four - wire circuits is higher than that of two - wire circuits, they offer considerably improved performance.
该方法系统结构简单，不仅适用于单相电路，而且也适用于三相四线电路。
The system structure of this algorithm is simple . It not only fits for single-phase circuit, but also for three-phase circuit.
事实上，可以不使用任何线来建立四线电路，例如通过微波、卫星或红外传输系统。
In fact, a four - wire circuit can be established without the use of any wires at all, as in the case with a circuit established over microwave, satellite, or infrared transmission systems.
换句话说，电路可以是物理双线(甚至是物理单线)、逻辑四线，它使用较少的线实现四线电路。
In other words, the circuit may be physical two - wire (or even physical one - wire) and logical four - wire, performing as a four - wire circuit but employing fewer than four wires.
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。
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.
介绍了在三相四线制供电系统中，中线的作用，断线的危害，以及一种简单可靠的断线保护电路。
The paper introduced the effect of neutral wire the harm of open circuit and a kind of simple credible open circuit protection method.
主要介绍用于三相四线制的有源电力滤波装置的研究工作，给出了系统的基本补偿原理、主电路及控制电路结构，并利用该装置进行了补偿实验。
This paper introduces an active power filter device used for three phase four wire. The compensation principle and structure of main circuit and control circuit are given.
首先介绍了现有教材中已给出的三相电路功率的测量方法，进而提出了三相四线制三相电路功率测量的另三种接线方法。
Firstly, the existing methods of the three phase power measurement in the teaching materials are introduced. And then another three connection methods are suggested for three phase four wire circuits.
首先介绍了现有教材中已给出的三相电路功率的测量方法，进而提出了三相四线制三相电路功率测量的另三种接线方法。
Firstly, the existing methods of the three phase power measurement in the teaching materials are introduced. And then another three connection methods are suggested for three phase four wire circuits.
应用推荐