Workless power is an important factor in designing and running of alternating current system. A compensation device is needed in substation and the end users to save electricity.
无功功率是交流电力系统设计和运行中的一个重要因素，为了减少电能损失，需要在电力用户端与电力系统的变电所内合理配置一定的无功补偿装置。
The system generates a direct current, so using it to power DC devices locally is more efficient than switching to the alternating current needed to feed it back to the grid.
该系统产生的电流为直流电，所以用来驱动本地的直流点装置比将其转化为交流电输入电网来的更有效率。
In the knowledge system of alternating current, the restrictive relationships of some physics quantities are similar with those of mathematical Numbers.
在交变电流的知识体系中，一些物理量的制约关系，与数学中一些数量制约有着相似之处。
This paper briefly introduces a hardware system of the alternating current motor test of the platform with superior natural price ratio.
简略介绍了一种具有优越性价比的交流电机测试平台的硬件系统。
The system may measure many circuits high - frequency alternating current , direct current , frequency, efficiency of inverter .
系统测试项目有多路高频交流电流，直流电流，频率，逆变器的效率等。
With the alternating current that flows through the power distribution system, the superconducting cables do suffer some losses of energy.
对于输电系统输送的交流电，超导电缆在传导时确实会损失一些能量。
Method The automatic ventilation and gas exchange system consisted of 2 electronic modulators, alternating current contactor, 1 switch, 1 oxygen meter and some seamless steel tubes.
方法自动通风换气系统由2个电动调节阀、1个交流接触器、1个开关、1台测氧仪、少量无缝钢管组成。
Amy Chang-chien, coordinator of this solar project, pointed out that traditional solar system has a centralized inverter to change direct current to alternating current.
万佛圣城太阳能计划协调人张简嘉乃指出，传统的太阳能系统采用中央逆变器，将直流电转换成交流电。
The paper mainly introduce the design scheme of alternating current chassis dynamometers electric control system.
文章主要给出了交流底盘测功机电控系统的设计方案。
AC fault security power source system is to provide alternating current for unit safety shutdown when power cut happens for a long time due to power grid failure or other reasons.
交流事故保安电源系统是当电网发生事故或其他原因致使火电厂厂用电长时间停电时，提供机组安全停机所必需的交流用电系统。
The function of the power supply is converting the alternating current provided by the power plant into direct current required by normal computer system.
电源供应器主要是用来将发电厂提供的交流电转变为一般电脑系统所需求的直流电。
As early as the end of 19th century, people had discovered the distortion problem of voltage and current existing in the distribution system when the alternating current arisen as a newly motive form.
早在19世纪末，当交流电以一种新兴的动力形式出现时，人们就发现了系统中电压、电流存在畸变的问题。
Considering the three different moving processes, complete mathematic model of controlled system that includes velocity loop of alternating current servomotor, is established.
针对三个不同的运动阶段，建立了包含交流伺服电机速度环的被控系统的完整的数学模型。
The induction motor is a major portion of the alternating current speed system and the decoupling control of the induction motor is major problems bringing about excellent performance of the (system).
感应电机是交流调速系统本体部分，感应电机的解耦控制是使系统达到优良性能的主要问题。
Ceramic insulator is widely used in alternating and direct current transmission system. But there exist some problems when using ceramic insulator in direct current transmission system.
瓷绝缘子广泛使用在交直流输电系统中，但在直流输电系统中使用还存在很多问题。
The telecontrol system of alternating current motor based on MSP430 single chip is presented in this paper. Also the hardware constitution and design of software are given in detail.
文中介绍了基于MSP430单片机的交流电动机遥控系统，并给出了硬件和软件设计。
Therefor the paper is very useful for the design and constructing control system of alternating current excitation generators.
本文为交流励磁发电机的设计及其励磁控制的建立提供了理论依据。
The frequency control of motor speed is used for alternating current motor of main winch on No1 BF charging system, so that it is possible to carry out control of skip moving speed.
安钢1号高炉主卷扬交流电机采用变频调速技术，实现料车运行调速控制。变频器运行一年多来，未发生过一次故障。
The utility model relates to a power saving device for an alternating current contactor, composed of a casing, a starting system and a maintaining system.
本实用新型是一种交流接触器的节电器，由壳体、启动系统、维持系统组成。
The utility model relates to a power saving device for an alternating current contactor, composed of a casing, a starting system and a maintaining system.
本实用新型是一种交流接触器的节电器，由壳体、启动系统、维持系统组成。
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