Unbalances appear in a three-phase system when voltages or currents differ from on phase.
三相系统中，某的电压或电流与其它相不相同时，就出现幅值与或。
The primary of a single-phase transformer is connected to one phase of the three-phase system.
单相变压器的提名候选人的预选会被连接到一状态的三状态系统。
The control principle, design idea and engineering fulfilment of TCT static var compensator in unbalanced three-phase system are introduced.
介绍了三相不平衡系统静止型动态无功补偿装置的控制原理、设计思想及工程实现。
To verify the simulation approach, simulation results and experimental results of a shunt active filter for harmonic current compensation in a three-phase system are presented.
要核实模仿方法，在一个三相系统提出模仿结果和分流器活跃过滤器的实验性结果泛音当前报偿的。
The paper simulates a three-phase system, analyzes influence of induction motor dynamics on voltage stability, and gives methods to improve voltage stability of induction motor nodes.
对一个三相系统模型进行仿真，分析了感应电机动态负荷特性对系统电压稳定性的影响，并给出改善电机节点电压性能的措施。
The results also indicate that when special filters are connected to secondary three-phase system, the primary harmonic currents decrease by about 28% than by using conventional two-phase filters.
结果还表明，当在二次侧三相系统接入文中提出的特殊滤波器时，谐波电流比用常规两相滤波器降低约28%。
Figure 1: Three actors for the system identified during the Inception phase of the project.
图1：在项目先启阶段为系统定义的三个参与者。
As work began on the Inception phase of the project, we identified three actors for the system.
项目的先启阶段，我们为系统定义三个参与者。
Raytheon Company was awarded one of three ＄30 million contracts for Phase A system design and prototype of the Space Fence system.
雷神公司获得三份总价值3000万美元的合同进行太空护栏系统Phase A阶段原型设计。
The three phase system is more efficient in that for the same mechanical power a greater total electrical output is obtained.
三个阶段的系统，更有效，为同一机械动力更大的总电力输出表达式。
The thesis introduces a three phase AC motor's mathematical model in static reference frame and a simulation system for AC motors to develop a vector control inverter system.
针对三相异步电机矢量控制系统的要求，根据在静止坐标系统中异步电机的数学模型，进行了系统仿真。
This paper studied the three-phase PWM(pulse width modulation) rectifier in dual PWM variable frequency speed regulation system.
对双PWM变频调速系统中的三相PWM整流器及其控制方法进行了研究。
The control system of this inverter is composed of 8098 single chip microprocessor and the new type three phase PWM IC SLE4520.
采用了以8098单片机和三相高频可编程脉宽控制器SLE4520为核心的控制系统。
Finally, the elementary procedure for establishing the harmonic models of three phase transformer in phase coordinate system is discussed.
作者还讨论了建立相坐标下三相变压器谐波模型的基本方法。
Based on the decoupling of fundamental power flow and harmonic power flow, a separate iteration method for calculating three-phase asymmetrical harmonic power flow in power system is presented.
以基波潮流和谐波潮流的解耦性为基础，提出了一种将电力系统三相不对称基波潮流和谐波潮流分离迭代的计算方法。
It is presented in the paper that SIN subdivide microstep driving system with microprocessor controlled for three phase hybrid stepping motor synthesises both software and hardware.
本文提出了一种单片机控制的软硬件结合的正弦波细分的三相混合式步进电动机微步驱动系统。
The application of Ethernet technology in automatic testing system for three-phase asynchronous motor routine test was introduced.
介绍了以太网技术在三相异步电动机全自动出厂试验系统中的具体应用。
The effectiveness can be proved in the application in the DSP control system of the three-phase induction motor.
通过在三相感应电机DSP控制系统中的应用，可以证明该方法的有效性。
This system can avoid the influence that three-phase imbalance load towards the output voltage of inverter.
该系统可以避免三相不平衡负载对逆变器输出电压的影响。
Based on ADC subsystem integrated in C8051F005 chip, a new kind of data acquisition system of three-phase voltage was designed, which acted as the microcomputer.
利用C8051F005单片机作为微处理器并基于其内部集成的ADC子系统，设计一种新型三相电压数据采集系统。
Finally, the experiment waveforms and data about 1.5kva three-phase static inverter are described and the results indicate that the system has excellent dynamic and static state performance.
最后给出额定功率为1.5KVA的三相静止变流器的试验波形和实验数据，试验结果表明该系统具有良好的动静态性能。
For high power system, every switch of three-phase inverter is actually made up of four MOSFETs in Parallel.
考虑到系统功率较大，三相桥式功率变换器的每个开关器件均采用四个MOS管并联的结构。
The experimental prototype of the three phase alternative hydraulic system was designed using the simple structure and transmission synchronization characteristics of the alternative hydraulic system.
利用交流液压系统结构简单和传动同步特性，设计出三相交流液压系统实验样机。
A cascade speed control system mainly consists of a wound asynchronous motor, a three-phase rectifier and a three-phase thyristor (?) inverter.
串级调速系统的主要组成部分是线绕式异步电动机，三相桥式整流器和三相可控硅逆变器。
Comparing with three-phase motor system, multiphase motor system has some obvious superiority.
多相电动机系统与传统三相电动机系统相比具有诸多明显的优势。
Digital design is the main character of this system. The three-phase SPWM pulses are generated through sine wave compared with triangular wave.
数字化设计是本系统的特点，系统最终生成的三相spwm脉冲是基于三相正弦调制波和三角载波比较得到的。
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。
The mathematical model of three-phase asynchronous motor in rotating coordinate system is established, and PWM technology of space vector is discussed.
建立了三相异步电动机在旋转坐标系下的数学模型，论述了空间矢量脉宽调制技术原理。
An all-digital vector control system of three-phase induction motor is presented.
提出了一种全数字式的三相异步电机矢量控制系统。
An all-digital vector control system of three-phase induction motor is presented.
提出了一种全数字式的三相异步电机矢量控制系统。
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