查询词典 magnetizing

This paper describes the simulation of magnetizing inrush current in transformer,which is calculated by conventional method and four-order Runge Kutta,respectively.

本文采用常规方法及四阶龙格库塔法对单相变压器合闸过渡过程进行计算，利用面向对象的Delphi语言以及Access数据库，开发了合闸涌流可视化仿真软件。

Existing principles of transformers main protection, especially in criterions of magnetizing rush current, are analyzed deeply in this paper. The author points out questions in existence, and describes a new method based on the sum of positive sequence active power flowing into transformers from each terminal.

本文就现有的电力变压器主保护原理，特别是各种励磁涌流判据，进行了较深入的分析，指出了存在的问题，并提出了新的基于正序功率的变压器纵差保护原理。

Second, and magnetic brakes, clutch: With the development of modern industry, and magnetic clutches and brakes, as a basic component in the industrial field received a wide range of applications and other components shown can not be replaced by the superiority of its high magnetic powder for media job to Change magnetizing current for the control of the means to control transmission, the purpose of braking torque.

二、磁粉制动器、离合器：随着现代工业的发展，磁粉离合器和制动器作为一种基础元件在工业领域中得到广泛的应用，并显示出其它元件无法取代的优越性，它以高导磁粉体为工作媒介，以激磁电流变化为控制手段，达到控制传递，制动扭矩的目的。

It is harmful to the characteristics of the transformers on line. It causes the increasing of magnetizing current, harmonics leakage magnetic flux, and thus the losses, which in turn results in the structures overheating and insulation ageing.

电力变压器的磁动势和磁通出现直流分量的现象称为"直流偏磁"，这一现象将对变压器的正常运行产生不利的影响，诸如励磁电流有效值、高次谐波成分及其相应损耗的增加，铁心高度饱和引起的漏磁通的增加，以及由此引发的局部过热、绝缘老化等问题。

In this topology, the main switches are operated under ZVS due to commutation of the transformer magnetizing current and the parasitic drain-source capacitance.

在此转换器，其主要开关主要是利用变压器的激磁电流和开关本身内部的寄生电容的换向，使得主开关操作於零电压的模式底下。

This thesis chooses B spline wavelet that adapts to the analysis of power system signal, and uses the wavelet transformer to analyze the magnetizing inrush current and inner fault current.

而小波变换具有多尺度分析和良好时频域局部化分析特性，适合提取信号边缘和峰值突变的特征，能够很好的检测信号奇异性。

The waveform of differential current in each data window is divided into four parts averagely according to time, and the area-ratio among the four parts can be used to distinguish magnetizing inrush from internal fault current.

该算法以工频一周波为数据窗长，将数据窗内的差流波形按时间均分为4份，根据各份面积之间的比值来识别励磁涌流和内部故障电流。

In the transformer differential protection, it is a congenital and difficult problem that cant be avoided how to distinguish the magnetizing inrush current with the internal fault current. It has become the focus studied for many years. The existing transformer protection principles all have certain defects and the main reason lies in inadequate understand of the transformer fault mechanism.

在变压器差动保护中，如何区分励磁涌流与内部故障电流是一个先天性的、不可回避的难题，多年来一直成为研究的热点，而且现有的变压器保护原理也都存在一定的缺陷，其主要原因在于对变压器内部故障的机理认识不够。

Parameter identification transformer protection linear model magnetizing inrush current

参数辨识；变压器；保护；线性模型；励磁涌流

To improve accuracy of detection of current direction, components of magnetizing current and torque current are transformed into two-phase stationary frame. Therefore compensating voltage vector can be decided according to the sector the current vector is locating.

为了提高电流极性检测的准确性，利用旋转轴系中的励磁电流和转矩电流分量经过坐标反变换，判断电流在两相静止轴系所处的扇区来决定需要施加的补偿电压。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。