three phase current

On the basis of analyzing the current wave in three phase alternating current system, the paper put forward a control method to realize zero current interrupt in three phase intelligent AC contactor.

本文通过对三相系统的电流波形分析，提出实现智能交流接触器三相触头的零电流分断控制方案。

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Study on Mathematic Model and Model Simulation of the Three Phase Solid State Fault Current Limiter

三相桥式固态限流器数学模型及其仿真研究

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Monitor apparatus can measure valid value of three phase voltage and current, power factor, three phase disequilibrium, instant flecker of short time and harmonic without twenty, degree and harmonic distortion total.

监测仪能够完成包括三相电压、三相电流的有效值、功率因数、三相不平衡、电压短期闪变、以及20次内的谐波、谐波相位、谐波失真总量等的测量。

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The control system is made of double closed loops: the inner current loop and the outer temperature loop, and satisfies the EAF's temperature need and three phase current balance.

采用温度控制外环和电流平衡控制内环的双闭环结构实现电弧炉温度和电极三相电流平衡的智能集成控制。

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A new and practical power factor control strategy for three phase PWM current source rectifier was proposed.

提出了三相电流型PWM整流器的一种新型实用的功率因数控制方法。

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It provides a method for the untouched switch Control for three-phase alternating current motor.

为大功率三相交流电机的无触点控制提供一种方法。

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Three phase optical current transducer ( OCT) is applied to the measurement of three phase current of electric power systems. A mathematical model is developed for the studying both the Faraday magneto optical and linear birefringence effect by using the method of matrix optics.

分析了一种用于测量电力系统三相电流的光学电流互感器系统，用矩阵光学方法建立了既具有旋光效应又具有线性双折射效应的三相光学电流互感器系统的数学模型。

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Finally, a SVPWM control strategy, which can balance the neutral point voltage by changing the control factor on the basis of judging the DC Voltage of two capacitors and the directions of three phase output current, is presented.

最后提出了一种基于检测直流侧电压和三相输出电流合理选择控制因子的滞环SVPWM方法。

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Study of Space Vector Modulation for Three Phase Current Rectifier

三相电流型整流器的空间矢量调制技术研究

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Adopt OrCAD/ PSpice emulate software, the paper has carried on detailed analysis and studied to three phase voltage and current waves for AC contactor in closing and breaking course.

采用OrCAD/PSpice仿真软件对交流接触器在闭合与分断主电路时的三相电压、电流波形进行详细分析研究，提出了智能无弧交流接触器全新的控制方法。

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The Hardware Method of Estimating Three Phase Inverter Output Current Through DC Bus Current

采用直流母线电流估计三相逆变器输出电流的硬件方法

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By detecting three phase current, vector analysis of their waveform is done and the barrier of low current grounding is detected. Then the protection of low current grounding is proceeded.

通过检测三相电流，对其波形进行矢量分析，检测出小电流接地故障，进而进行小电流接地保护。

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Analysis and design of three phase AC-DC converter with current indirect control

间接电流控制三相交-直变流器的系统分析与设计

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It can generate a steady 380 V three phase alternating current through an AVR circuit, and can drive heavy electric tools such as polisher, air compressor and so on.

采用三次谐波励磁的同步发电机，通过AVR电路产生稳定的380V三相交流电，可以带动打磨机、空气压缩机等功率较大的电动工具；

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NOVELTY-The system has a pulse width modulation ( PWM) converter module converting three phase alternating current ( AC) power outputted from a generator module to a direct current ( DC) power.

新颖性–该系统具有一个脉宽调制（PWM）转换器模块，将发电模块输出的三相交流（AC）电源转换成直流（DC）电源。

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KCL& KVL can be applied to complex circuit counting made up of different components, as well as to any changing electric current and voltage, even to three phase alternating current.

KCL和KVL可推广应用到由不同元件所构成的复杂电路计算中，亦可推广应用到任何变化的电流和电压的计算甚至是三相交流电路的计算之中。

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Distributed laws and associated features between the three phase transient current components ( TCC) are analyzed in theory, on the basis of sufficient researches to formed mechanism and distributed features of the single-phase-grounded-fault transient state process in non-effectively grounded systems.

在对非有效接地系统中单相接地故障暂态过程形成机理及其分布特征研究的基础上，从理论上分析馈线三相电流暂态分量间的分布规律及其关联特征。

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Cause Analysis and Fault Measures of Three Phase Current Unbalance at GIS in Jiangling Convert Station

江陵换流站GIS串内三相电流不平衡的原因分析及故障处理

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Hardware system includes three phase inverter, current and voltage detection circuit, position sensoring and other modules.

硬件系统包括三相逆变器、电压电流检测、位置传感处理等模块。

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The technologies of neural network control and fuzzy expert control were used in the large power EAF intelligent automatic control system, which realizes two closed loops control of three phase current and temperature of EAF, and assures three phase current equilibrium and temperature stabilization.

将模糊专家控制、神经网络控制等智能控制技术运用到智能大功率电弧炉自动控制系统，实现了电弧炉三相电流和温度双闭环控制。

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Application of Three Phase Alternating Current Intelligent Instrument for Factory Electric Energy Measurement

分布式三相交流智能前端在厂用电计量中的应用

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Novel Power Factor Control Method for Three Phase Pulse Width Modulation Current Source Rectifier

三相电流型脉宽调制整流器的功率因数控制新方法

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Field Orientated Control of Three phase Alternating current Motor

三相交流电机的磁场定向控制

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Unbalance Analysis for Three Phase Current in Power Ling Caused by Incomplete Transposition

不完全换位引起的输电线路三相电流不平衡分析

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The calculate of three phase short-circuit current of the simply power network supplied by the synchronous generator

简单电力网三相短路电流的计算

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The three phase AC current generated by excitation generator is transformed to DC current and then pass it to main generator as its excitation current.

励磁电机的转子电枢产生的三相交流电通过旋转整流器变成直流，给主发电机励磁。

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And current loop introduces fuzzy expert coupling control of three phase current.

外环采用模糊、神经网络和优化决策共同控制，内环则采用模糊专家解耦控制。

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The design of automatic control system for phase order adjustment and phase-failure protection of three phase alternating current

三相交流电源自动调相及断相保护控制系统设计

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Research on Three Phase Current Measurement from DC Line of SVPWM Inverter

由SVPWM逆变器直流电流获取三相输出电流的方法研究

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Phaes order of three phase alternating current has direct effects on some electrical appliances, so it is necessary to determine it beforehand.

三相交流电源的相序对于某些用电设备有直接的影响，那么在某些用电场合，应要事先测定出电源的相序。

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