The analysis of three-phase circuits is little more difficult than that of single-phase circuit.
三相电路的分析比单相电路难不了多少。
The system structure of this algorithm is simple . It not only fits for single-phase circuit, but also for three-phase circuit.
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。
Viewed in this light, it will be found that the analysis of three-phase circuit is little more difficult than that of single-phase circuits.
鉴于此，三相电路的研究分析并不比单相单路研究难多少。
Research on the zero-current-breaking control (ZCBC) for intelligent ac contactor and realize the micro-arc-energy breaking control in three-phase circuit.
进行智能交流接触器零电流分断的研究，并实现了三相电路的微电弧能量分断控制。
Active power filter can compensate current components which include distortion and negative sequence current components when it is used in unbalanced three-phase circuit.
电力有源滤波器能动态补偿不对称三相电路的畸变电流、负序电流分量。
It contains three parts of circuit: phase quantizer, data memory and weighting summation.
它包含了相位量化器、数据存储和加权相加三部分电路。
Among the three-phase power-factor correction circuits, the full decoupling circuit is especially suitable for high power fields because of its high input power and good electrical performance.
在三相功率因数校正电路中，全解耦型电路由于其输入功率大，电气性能较好等优势特别适用于大功率场合。
The expression for short-circuit electrodynamic force of rectangular bus bars on the basis of the calculation of three-phase symmetry short-circuit current was fi.
本文首先根据系统发生三相对称短路时的短路电流，给出了三相矩形母线短路电动力的解析表达式。
The dynamic braking means that after three-phase voltage is switched off asynchronous dynamo the dc current flows into the stator circuit to realize dynamo braking.
能耗制动是在异步电动机切离三相电源后，在定子回路通入直流电流，实现能耗制动。
Finally, combining programming measurement software together with data-requiring card and potential transformer circuit complete the measurement of three-phase voltage fluctuation and flicker.
最终混合编程检测软件、数据采集卡、电压互感器电路共同完成对电网三相电压波动和闪变的检测。
The paper mainly introduces a kind of stimulatior, It emphasizes on the mathematical mode! of three phase short circuit breakdown and its showing methods.
为此，简单介绍了一套较完整的仿真系统，其中主要介绍了发电机组三相短路后电压、电流数学建模过程及图形化显示方法。
This paper presents a design precept of static inverter using three phase PWM generator SA8282 and shows the programmes for designing hardware and software of the circuit.
简要介绍采用三相pwm产生器sA 8282研制的三相静止逆变器及其电路硬件、软件设计方案。
It can be seen from model experiment that the Total Harmonic Distortion (THD) of the current in the three-phase rectification circuit can be reduced from 30% to about 10%.
通过模拟试验证明，三相整流电路交流侧电流中的谐波含量由原来约30%下降到约10%。
This paper presents a theoretical analysis on the electromagnetic process of three-phase magnetic amplifier of the transductor type with bridge rectifier output circuit .
本文对工作绕组为串联或并联的三相扼流磁放大器（带桥式整流输出）的电磁过程进行了理论分析；
Taking PM75CLA120 as an example introduces the structure of IPM, the applied circuit design of IPM and the use of IPM in modular three-phase inverter.
以PM 75cla120为例，介绍IPM结构、应用电路设计和在组合式三相逆变器中的应用。
The shift trigger pulse of the thyristor trigger circuit with integration amplifier is generated by comparing directly principle of three-phase AC and shift-phase control voltage.
该晶闸管触发器采用集成运数放大器，移相触发脉冲的形成是根据三相交流电的各相与移相控制电压直接比较原理实现的。
So, it is significant to prevent the occurrence of faulted neutral line within the circuit of three phase and four line system.
因此，防止三相四线制配电回路断零事故的发生，具有更广泛的意义。
Designs of the three-phase power supply, gyro-controlling circuit, azimuth-sampling circuit, and the interface with other tools are described.
文章介绍了井下陀螺三相电源、框架陀螺控制电路、方位采集电路的设计和通用短接接口的设计。
In the Three phase and Four wire circuit system, the neutral wire is very important.
在三相四线制供电系统中，中性线是非常重要的。
Then the article designs and researches inverter circuit, driver circuit, working power supply, voltage regulator feedback circuit protection circuit of three-phase inverter power.
对三相逆变电源的逆变电路、驱动电路、工作电源、保护电路和稳压反馈电路进行了设计研究；
These three parts use the silicon-controlled rectifier to carry on the control, the trigger of silicon-controlled rectifier adopt phase-shifting trigger of KC05 integrated circuit.
这三个部分均采用可控硅进行控制，可控硅的触发采用KC05集成电路移相触发。
Based on the detailed analysis of basic principle, the traditional three-phase short-circuit criterion of phase selection element based on sudden-change of phase current differential is improved.
在详细分析相电流差突变量选相基本原理的基础上，对传统相电流差突变量选相元件三相短路故障判据进行了改进。
The author tries to analyze the operational characteristics of three phase induction motor using the T-type equivalent circuit of induction motor and the energy ratio method.
本文尝试用感应电动机的T型等效电路和能量比法，分析三相感应电机的工作特性。
This paper introduces a novel short circuit fault current limiter applicable to the three-phase ungrounded power systems.
介绍了一种适用于三相不接地系统的短路故障限流器。
Set up the circuit design criterion for the steady - stage deadbeat control to the line current of a three - phase high-power-factor rectifier based on voltage space-vector PWM.
建立了对基于电压空间矢量pwm的三相高功率因数整流器实现电流稳态无差拍控制的设计准则。
Considering the effect of the skin-effect during the starting of three-phase asynchronous motor on the parameter, the author sets up an equivalent circuit of variable parameter.
考虑三相异步电动机起动过程挤流效应对参数的影响，建立了变参数的等效电路。
On the structure of system, the three-level converter of three phase bridge of the equipment in main circuit is built with IPM module based on IGBT, and its controller is made up of double CPU.
在系统结构的实现上，该装置的主电路采用基于IGBT的智能模块IPM构成三相桥三电平变流器；
The remove of the control circuit failures of the three-phase asynchronous electric motor is the major and difficult aspect in the training and examination for electrical students.
根据电工培训的实践经验，分析三相异步电动机电气控制线路接线易出现的故障及原因，给出故障排除的方法，并归纳出有针对性和启发性的教学训练方法。
The remove of the control circuit failures of the three-phase asynchronous electric motor is the major and difficult aspect in the training and examination for electrical students.
根据电工培训的实践经验，分析三相异步电动机电气控制线路接线易出现的故障及原因，给出故障排除的方法，并归纳出有针对性和启发性的教学训练方法。
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