变压器

This thesis presents a new approach for modeling the magnetic saturation and hysteresis of transformers using an artificial neural network.

本论文提出使用类神经网路，进行变压器磁滞饱和特性模拟的一种新方法。

Fe-Zr-B amorphous alloy is an important soft-magnetic material, which has important applications in preparation of transformer, magnetic recorder, electromagnetism disturbing shield and so on.

Fe-Zr-B 非晶合金是一种良好的软磁性材料，在变压器设备、磁性记录材料、电磁干扰屏蔽材料等领域有着重要的应用。

Transformer; magnetizing inrush current; fault current; BP neural network; RBF network

变压器；励磁涌流；故障电流； BP神经网络； RBF神经网络

When power transformer is in steady state,its magnetizing current is little,and usually the magnetizing current is not more than 3%~\Q% of rated current value.

变压器正常运行时的励磁电流很小，一般不超过额定电流的3％～10％。

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。

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

Considering that the load current contains a little portion of the magnetizing current, this paper presents the approach of magnetizing current compensation.

考虑到负载电流中有小部分励磁电流分量，该文提出串联变压器励磁电流补偿(magnetizing current compensation，MCC)的方法。

The main body of a book have analysed a generator losing the magnetism physics process , have given a generator out the fundamental equation losing the magnetism queen; By using simulated module of electric system in Matlab/Simulink,build a single infinity system emulation model , have included module such as generator , excitation system , transformer , idle work power source , circuit loads , infinity system , transmission line; Lose magnetism condition two kinds specifically for the excitation winding loses magnetism and the part completely losing magnetism, lower emulation having carried out different working condition, have gained machine holding stater voltage , have encouraged the magnetoelectricity stream , excitation voltage and output having performed meritorious service power wave form change condition; By simulated wave form of contrast , to every electricity amounts, change law has carried out theoretical analysis.

本文分析了发电机失磁的物理过程，给出了发电机失磁后的基本方程；通过使用Matlab/Simulink中的电力系统仿真模块，建立一个单机无穷大系统仿真模型，包括了发电机、励磁系统、变压器、无功电源、线路负载、无穷大系统、输电线路等模块；针对励磁绕组完全失磁和部分失磁两种失磁情况，进行了不同工况下的仿真，获得了机端定子电压、励磁电流、励磁电压和输出有功功率波形的变化情况；通过对比仿真波形，对各电气量变化规律进行了理论分析。

In most cases it is derived from the AC mains by means of a transformer and rectifier.

大多数情况下直流电是从交流电通过变压器和整流器而来的。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。