电流

The main concern is using fault current to set relay Tap changer, and drawing the characteristic curve to discuss the effect of load models on their setting.

主要是利用故障电流设定过电流电驿之电流分接头设定值，并绘制其特性曲线以便电驿快速设定，及分析电驿受负载模型的影响。

Because the magnetic field is always associated with the current, then the magnetic field is expected to think that it is by another current - displacement current generated.

因为磁场总是与电流相联系，则预期的磁场也认为是由另一种电流——位移电流产生的。

The; of down-lead of 200 A binary electric current that the design made intensity of central field magnetic induction be 3 T is opposite through the experiment of the thermal resistance of interior of the leakage heat of voltaic down-lead, heat exchanger and line of high temperature superconduction and cupreous matrix solder resistor undertook metrical, studied refrigeration engine trouble or the transient state temperature of down-lead of the electric current below power cut condition changes.

设计制作了中心场磁感应强度为3 T的200 A二元电流引线；通过实验对电流引线的漏热、换热器内部的热阻以及高温超导线和铜基体的焊接电阻进行了测量，并探究了制冷机故障或者停电状态下电流引线的瞬态温度变化。

Based on nonliner dynamic simulation model of BLDCM.simulation model of speed and double close loops of current are built in adjusting speed system for BLDCM.Through simulation the performance of BLDCM is researched,in the way PI adjustors of speed and current adopted,fuzzy control used in speed loop and PI adjustor used in current loop,which prepares theory base for controller design of high quality BLDCM.

在直流无刷电机非线性动态仿真模型基础上建立了转速、电流双闭环直流无刷电机调速系统仿真模型，对转速、电流环均采用PI调节器及转速环采用模糊控制器、电流环采用PI调节器的直流无刷电机性能分别进行了仿真研究，为高性能直流无刷电机控制器设计提供了理论依据。

An arbitrary shaped line current on a horizontal plane is divided into many small line segments and approximated by Hertzian diploes, then both the near and far EM-field of the line curennt is approximated by the summation of the complete near and far fields of Hertz dipoles.

水平面上任意形状线电流分割为许多小段之电流，每一小段之电流近似为赫芝偶极，则在三度空间任意座标平面上无论远近之电磁场即可以赫芝偶极之远近完整电磁场加总合成近似之。

Moreover, second-winding current waveform of a current transformer is calculated under the transient current of the typical short-circuit fault by numerical method. The analysis shows that the relevant protection equipment may refuse to trip when the fault current is extra high. It will result in the maloperation of protective relays for loss of their selectivity, and cause other protective relays to operate beyond range, and extend the scope of shutdown of power supply.

在这些回路出口处发生相间直接短路等严重故障时，流过相应TA一次侧的故障电流可能达到TA额定工作电流的100倍以上，大大超过了保护用TA的10%误差容许倍数，将使TA严重饱和，从而影响相关的保护设备的动作性能，因此有必要对在这种特大电流作用下的TA的传变特性做一些探讨，以分析其对继电保护装置动作特性的影响及应采取的措施。

The Hilbert modulus is defined as the sum of the square of a signal and its conjugation.Hilbert modulus is used to covert the fundamental component in original phase current to direct current component,the fault characteristics frequency of bar break is transformed into the twice slip frequency.The problem is solved that fault characteristic component in the spectrum analysis of the current is easily to be blanketed by fundamental component and is hard to highlight fault characteristics.

将Hilbert模量定义为原始信号与其共轭信号的平方和，利用Hilbert模量将原相电流中的基波分量转变为直流分量，原频谱分析的转绕组断条的故障特征分量转变为频率为二倍转差频率的电流分量，决了相电流频谱分析方法中断条故障特征成分容易被基波湮没而难以突出故障特征的问题。

Motor starting current is a function of the motor design and may be as much as twenty times full-load current in extreme cases.

电机电流取决于设计方法，在一些极端情况电机电流可能超过20倍满载电流。

Gas-filled relays also provide low,stable leakage current in applications sensitive to current fluctuations especially across open contact sets over long periods of time.

在对电流波动很敏感的应用中，充气继电器具有低而稳定的泄漏电流，特别是在断开触点间，可以长时间保持很低的泄漏电流。

This paper deals mainly with the stray current distribution in running tunnel of metro by means of analytical method of equivalent circuit diagram and the analytical method ,and discusses the influence of resistance of rail to ground and the resistance of track on the variation of stray current.

利用等效电路分析法和解析法分析了地铁区间隧道中杂散电流的分布，探讨了轨地过渡电阻值以及走行轨阻抗对杂散电流变化的影响，得出轨地过渡电阻的降低和走行轨阻抗的增大是区间隧道中产生杂散电流的主要原域。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。