交流电路中的有用功率还取决于该电路中的电流和电压。
The useful power in ac circuit also depends on the current and voltage in the circuit.
请勿将开关卡直接连接到交流电源、由某个电力公司提供的功率水平。
NEVER connect switching CARDS directly to AC mains, the level of power supplied by an electric utility company.
本文给出了交流电力测功器的系统结构图、系统工作原理、控制电路组成及功率测量方法。
In this paper the dynamometer's structure block diagram, system principle, power measurement and the control strategy have been given.
电信号被用电子的方法放大，即利用输入放大器的交流电能将信号的功率放大。
The electrical signal is amplified electronically, with an increase in signal power occurring at the expense of the input AC power to the amplifier.
使用时仅需外配一只电位器既可实现交流电功率调节，在许多应用场合中可代替笨重的接触式调压器。
It just needs one potentiometer additionally to realize ac power regulation during being used, this product could take the place of heavy contacting voltage-regulator under most circumstances.
为大功率三相交流电机的无触点控制提供一种方法。
It provides a method for the untouched switch Control for three - phase alternating current motor.
由功率四边形进一步确立了非正弦交流电路中的电流四边形和导纳四边形，以及它们和功率四边形的相似关系。
Further, the current quadrilateral and admittance quadrilateral, as well as their similarity to the power quadrilateral in non-sinusoidal alternating-current circuits were derived.
在交流电网中，常常采用移相电容器补偿无功功率损耗的方法来提高网络的功率因数。
In ac power network, the way of phase-shifting capacitors to compensate reactive power loss is always adopted to raise network power factor.
高功率因数稳压电源是一种既能起到稳压作用又可以提高电源输入端功率因数的高性能交流电源。
High power factor stabilized voltage supply is a kind of high performance alternating current power supply which can not only steady the output voltage but also enhance the input power factor.
三相同步发电机作为三相工业频率的交流电源，研究其有功功率调节具有重要意义。
It's significant to study the regulation of active power of three-phase synchronous generator by way of the alternating power source of three-phase industrial frequency.
它采用大功率的SCR组成电压调节电路，这样交流电动机就可以低压起动。
It adopts SCR with large power to establish the voltage adjustment circuit, so the AC motor can be started with low voltage.
该装置由逆变主电路和以arm 7单片机at91 M 55800为核心的测控系统组成。逆变主电路实现了频率和功率均可调的超声频交流电的输出。
This device consists of inverter major circuit and monitoring system based on ARM7 chip AT91M55800. The main circuit produces power supersonic AC output with adjustable frequency and changeable power.
该车载充电机具有较高功率因数，能够与普通的单相交流电源插座直接连接，为电动轿车的蓄电池组提供小功率慢速充电。
This charger has the trait of high power factor, can be connected to ordinary single-phase AC sockets directly, and offers low-power and low speed charging for storage batteries.
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。
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.
其基本原理是将交流电机的滑环输出功率通过整流电桥和有源逆变器送回交流电网。
The basic principle of the system lies in feeding back the output power at the motor slip rings of an AC motor into the mains through a bridge rectifier and an inverter.
介绍了水电阻软启动装置的工作原理及特点，应用其可满足大功率交流电机启动的要求。
This paper introduces the characteristic and principle of water resistance soft-start technology and points out it can satisfies the starting of high-voltage large power ac motor.
设计开发一种工业用三相交流电参数仪，能够测得三相交流电各相的电压、电流、功率、功率因子等参数；
A three-phase alternating current parameters instrument to be used in industry is designed. It can measure the voltages, currents, power factors of each phase of three-phase alternating current.
基于上述三相交流电弧炉电路模型，分析了电流不对称和阻抗不对称对电弧功率的影响，并讨论了交流电弧炉三相电参数互相影响的复杂性。
The influences of the asymmetry of current and impedance on the arc voltage and power were analyzed, and the investigation complexity was also discussed.
它能够使用普通同步发电机发出恒频恒功率交流电，电能质量更好，所使用的变换器功率低于发电机功率。
It can make a synchronous machine to generate an ac power with constant frequency and constant power, the power quality is better and the power of matching convertor is lower than the generator.
交流电网侧通过双闭环控制，实现有功功率和无功功率的解耦控制，同时具有稳定直流母线电压的能力。
The alternate current line side realizes the decoupling control of active power and reactive power through double closed loop and the stability of direct current voltages at the same time.
介绍了一种解决普通手工交流电焊机功率因数偏低及耗能严重现象的方法。
A method which can increase power factor and decrease energy consumption of common manual ac electric welding machine is presented.
分析了造成大功率硅整流交流电能计量装置计量误差大的原因，介绍了具体的改造内容。
It was analyzed why the tolerance of the measurement unit of alternating current for high-power silicon rectification being large. Some concrete improvement measures on it was given.
从本质上来讲，功率因数校正的目的是使用电设备的输入端口对交流电网呈“纯阻性”，保证输入电流和电网电压随时成正比。
In essence, the aim of PFC is to make the input terminal of electrical equipment appear resistive to the AC line, and insure that the input current be proportional to the instantaneous line voltage.
66200系列数位式功率表是用来量测单相交流电源的功率及其他电压电流参数，适用于大部份的电机电器产品。
Chroma's 66200 Series Digital Power Meter is designed for single-phase measurements of AC power signals and related parameters common to most electronic products.
基于误差lms，提出了交流电力智能传感器的一种功率测试方法，在对关键采样点作基于误差lm S线性估计的基础上对该方法进行了改进。
For AC power smart sensor, a power test method is proposed based on error LMS principle. Some key sample points are estimated linearly based on error LMS which are improved.
无功功率是交流电力系统设计和运行中的一个重要因素，它与电力系统的安全稳定和经济运行息息相关。
Reactive power is a crucial factor for the design and operation of ac power systems, and is closely bound up with the safety, stabilization, and economical operation of the power system.
该CTR系列产品提供具有UL认证的交流额定输出功率为每通道25安培，在600伏交流电，交流或直流输入控制下，零电压或随机打开，具有IP20触摸安全构造和内部散热器。
The CTR series offers UL approved AC output ratings of 25 amps per channel at 600 VAC, AC or DC input control, zero voltage or random turn on, and IP20 touch safe construction with integral heat sink.
智能交流电源检测仪是对市电、柴油发电机组、交流稳压电源、逆变器及大功率ups的带载能力和技术参数进行检测的仪器。
Intelligent AC tester is the instrument that can test load capability and technology parameter of AC, diesel generator set, AC stable supply, inverter and high-power UPS.
智能交流电源检测仪是对市电、柴油发电机组、交流稳压电源、逆变器及大功率ups的带载能力和技术参数进行检测的仪器。
Intelligent AC tester is the instrument that can test load capability and technology parameter of AC, diesel generator set, AC stable supply, inverter and high-power UPS.
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