As for a vector control system of a permanent magnet synchronous motor this paper analyzes the influence of dead-time on output voltage in detail and discusses the relationship between the position of output voltage vector and the direction of three-phase current in a space vector figure .
该文针对永磁同步电机的矢量控制系统，详细分析了空间矢量PWM中死区效应对输出电压的影响，并结合空间矢量图，讨论了输出电压矢量位置与 三相 电流方向的关系。
In this method three-phase high frequency voltage vector has been injected into coordinate ; the rotor position is identified by analyzing three-phase current amplitude .
该方法向 三相坐标系注入三相高频旋转的电压矢量，并通过对 采样到的 三相高频 电流幅值进行分析，得出转子位置。
The device has considered its practical functions which include Chinese character parameter waveform display for three-phase current fixed value and retain of failure information .
装置考虑了实用功能设计。具有汉字参数、 三相 电流波形显示，整定值、故障信息的保留等功能。
The three-phase current-mode PWM rectifier under the conditions of power imbalances has been studied and a compensation method of three-phase current curb-side PWM rectifier current net negative sequence components in the state of voltage unbalanced .
对电网不平衡条件下的三相电流型PWM整流器进行了研究，提出了一种在电网电压不平衡状态下，抑制 三相 电流型PWM整流器网侧电流负序分量的补偿方法。
The system can simultaneously collect information of three-phase current and voltage signals throughout the power network also performs a real-time harmonic analysis and figures out basic power quality parameters and then makes warning judgment according to the results .
系统可以对电网三相电压和 三相 电流信号同时进行信息采集，实时完成谐波分析，以及基本电能质量指标参数的计算，并根据计算结果做出预警判断。
It can be concluded from the result that the real waveform of the three-phase current and voltage can be reverted to the host by the data sampled by the sampler .
结果显示，被采集的数据在主机上显示的波形能够充分还原 三相电压和 三相 电流的实际波形。
A three-phase current method is presented to measure resistive current based on which an electrified measuring instrument for MOA is developed .
提出了一种 三相 电流法测量阻性电流，并在理论分析的基础上，研制了MOA带电测量装置。
Changing three-phase current to three-phase symmetry current is adopted as the target of compensation .
同理，将 三相 电流补偿为三相对称的电流作为Vv+直供相间补偿方案的补偿目标。
The Annexed Line Losses Caused by the Asymmetry of Three-phase Current and its Loss-reduction Methods ; Research on output symmetrical control strategies for combinatorial high power three phase inverter
三相 电流不对称引起的附加线损与降损措施组合式大功率三相逆变电源输出对称性研究
Measuring method of ratio braking characteristic curve on differential protection for impedance-matching balance transformer with three-phase current power supply
用 三相 电流源测试阻抗匹配平衡变压器差动保护比率特性曲线的方法
An experiment of simulative resistive current increase is carried out . The results show that the three-phase current method can measure the increment of resistive current correctly which easies the detection of early MOA fault .
利用该装置进行了模拟阻性电流增大的实验，结果表明， 三相 电流法能够正确测量出阻性电流的增量，可以方便地对MOA早期故障进行判断。
Electrified measuring of MOA using three-phase current method
基于 三相 电流法的金属氧化物避雷器带电测量研究
With the development of the technology of superconducting and power electronics three-phase current source converter remains its dominant status in superconducting magnetic energy storage field .
随着超导技术和电力电子技术的发展， 三相 电流源型变流器（CSC）在超导储能领域依然占有主导地位。
Taking general convertor as object this paper analyzes the fault diagnosis algorithms by combining the output three-phase current FFT processing and Elman network together .
以通用变频器为对象，应用输出 三相 电流FFT及Elman网络结合进行故障诊断分析。
The key POints of the IEC method for calculating the short circuit current and its heat effect of a three-phase current system are described and elucidated specifically by examples .
介绍IEC 三相 交流系统短路电流计算方法的重点和短路电流热效应计算，并用例题介绍其具体使用情况。
Through analyzing traction bus current traction bus voltage before and after compensation the relationship between three-phase current unbalance degree traction current total harmonic distortion rate and compensation degree is presented .
并通过分析平衡牵引变压器补偿前后的牵引母线电流、牵引母线电压，得出 三相 电流不平衡度、牵引电流总谐波畸变率与补偿度之间的关系。
This instrument can measure such parameters as three-phase current three-phase voltage active power and power factor of an ESP well .
该仪器可以 带电测量电潜泵的 三相 电流、三相电压、有功功率和功率因数等参数， 采用LCD点阵液晶显示屏显示，掉电数据保存，测量 精度 0.5 级。
Further more a detailed comparative study of two-level system and three-level system is conducted . The simulation results three-phase current waveforms the electromagnetic torque waveform are given .
并且与两电平系统从 三相 电流波形、电磁转矩波形进行了详细的对比分析，分析发现采用三电平变流器后，电流的谐波明显减少，更加接近正弦波，电磁转矩脉动得到改善。
This paper states a detecting method for defect of three-phase current motor and it also introduces the experimental analysis result and practice utilization condition of this detecting method .
本文阐述了对 三相 交流电动机故障的一种检测方法，并介绍了该检测方法的实验分析及现场应用情况。
Method to three-phase current reconstruction of PMSM compressor
一种永磁同步压缩机 三相 电流重构方法
A new three-phase current source rectifier ( CSR ) topology and its multi-bridge parallel technique are studied in the paper .
研究了一种新的 三相 电流型PWM整流器（CSR）的拓扑结构及其多桥并联技术。
It analyses and calculates the three-phase current of current sample time and of the last by a multi-layer feedforward neural network ( MLFNN ) then the harmonic components of the three-phase current are got .
该方法应用一个多层前馈神经网络（MLFNN），对当前采样时刻和上一采样时刻的 三相 电流采样值进行分析计算，得出三相电流的谐波分量。
This harmonic detector is able to complete synchronous sampling of the three-phase voltage and three-phase current . Meanwhile it shows great computing power and has the function of real-time data processing and measurement results transmission .
该谐波检测仪能够完成三相电压、 三相 电流的同步采样，同时具有较强的运算能力，具有实时处理数据并实时传输测量结果的功能。
KIWA synthetic power saver with his unique structure form eliminates higher harmonic of the electrical network by way of the balance in adjusting three-phase current and voltage .
KIWA综合节电装置以其独特结构形式，通过调整 三相 电流和电压的平衡，消除电网高次谐波。
Conclusion Using three-phase Current Source Rectifier as the charging circuit that can output size adjustable charge current for wide range voltage achieving power factor correction .
结论利用 三相 电流型整流器作为充电电路，可以输出大小可调的充电电流，实现了功率因数校正，充电电压范围较宽。
It advised a compensation strategy of its effect which divides three-phase current into six regions according to the space vector figure of current and compensated three-phase voltage in each region in terms of current directions .
根据电流空间矢量图将 三相 电流分成6个区域，并在各区域中按电流方向对三相输出电压进行补偿。
Three-phase current measurement in power system based on GMR
基于巨磁阻的电力系统 三相 电流测量及其应用
Three-phase current should be used for large motors .
大型电机应该使用 三相 电流。
The neutral-point voltage fluctuation of three-level converter is only related to applied modulation method and three-phase current .
三电平变流器的中点电压波动只与变流器采用的调制技术和 三相 电流有关。
A mathematical morphology ( MM ) detection method based on αβ and dq transformation is proposed to detect three-phase current harmonic components .
在对 电流信号进行αβ变换和dq变换的基础上，利用数学形态滤波器良好的低通滤波特性，提出了一种基于数学形态学的 谐波 电流检测方法。
三相电流