查询词典 magnetizing current

It is the existent of magnetizing inrush current in transformer that differs transformer differential protection from differential protection of other main equipments and transmission lines.

由于变压器励磁涌流的存在，使得变压器差动保护有别于其他主设备及线路的差动保护。

This transformer protection scheme is immune to the magnetizing inrush current influence and does not need the accurate parameter of transformer. The scheme is simple and has been proved with the simulation test and dynamic analog test.

该变压器保护方案不受励磁涌流的影响，而且无需精确取得变压器的内部参数，实施简单，仿真和动模试验结果证明了该原理的可行性。

How to discriminate between internal fault and magnetizing inrush current is the difficulty of transformer protection when apply differential relay.

变压器主保护选择差动在原理上存在不足，带来的问题就是如何准确鉴别励磁涌流与内部故障，这也是目前变压器保护的难点。

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。

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

In AC drive control system, in order to obtain the high dynamic response of an induction machine, the magnetizing and torque components of stator current must be decoupled suitably respective to the rotor flux vector .

以感应电机为核心的交流拖动系统为了获得电机的高动态特性，对应于转子磁链向量的定子电流的两个分量励磁分量和转矩分量必须进行合适的解耦合。

Use nationalization degree and the relationship that commercialize degree, condition of calculable market economy plays scope of optimal and state-owned economy.

利用国有化程度与市场化程度的关系，可计算市场经济条件下最佳国有经济规模。

The kinds of extractant also effected desulfurization rate .

萃取剂对脱硫率的影响也很大，乙二胺的萃取效果优于甲醇的。