基于回转器的电力变压器绕组直流电阻测试原理及应用  

Principle and Application of Measuring Power Transformer Wire-Wound DC Resistance Based on Gyrator

作　　者：管金云[1] 刘原[1] 

机构地区：[1]南华大学电气工程学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2007年第1期46-48,共3页Journal of University of South China：Science and Technology

基　　金：衡阳市科技计划项目(2005KG01-017)

摘　　要：变压器绕阻等效电路是一个大电感与一个小电阻相串联的组合.变压器绕组直流电阻测试回路是一个一阶电路,其时间常数很大,人们为了减小测试回路时间常数,提出了很多有效办法.本文利用回转器将大电感与小电阻相串联的组合转变为小电容与大电阻相并联的组合,配合桥式测量电路,大大减小了测试回路中的时间常数,从而为实现电力变压器绕组的直流电阻快速测试提供了新的途径.同时设计了具体应用电路,以供参考.The circuit model of transformer wire - wound is large inductance in series with small resistance. The circuit for testing its resistance is a first - order circuit, whose time constant is very large. A lot of effective methods were given for the sake of decreasing the time constant. This paper discusses the method of a model of large inductance in series with small resistance transformed into a model of small capacitance in parallel with large resistance by gyrator. It worked in bridge testing circuit, and the time constant decreased greatly. This is a new method for fast measuring of transformer wire - wound DC resistance. Hence a concrete and practical circuit was offered in this paper.

关 键 词：回转器 变压器绕组 直流电阻测试 

分 类 号：TM401.1[电气工程—电器]