基于双回路磁检测原理的电流比较仪  

Current comparator based on principle of double-loop magnetic detection

作　　者：任士焱[1] 郭思维[1] 刘晓军[2] 刘清新[1] 

机构地区：[1]华中科技大学电气与电子工程学院强电磁工程与新技术国家重点实验室,湖北武汉430074 [2]中国电力科学研究院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2016年第1期128-132,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51177061)

摘　　要：为了解决多通道磁调制式直流电流比较仪遇到的虚假平衡点导致通道封闭的问题,提出了双回路磁检测器原理.双回路磁检测器由磁放大器回路和磁调制器回路组成,利用磁放大器的输入输出特性来改善磁调制器的输入输出特性,其输出信号同时具有磁调制器输出信号高灵敏度的特性和磁放大器输出信号单质的特性.实验测试了双回路磁检测器实验模型的输入输出静特性曲线,并建立了双回路磁检测器的Simulink仿真模型.实验和仿真结果表明:相比于传统的磁调制器,双回路磁检测器直流检测特性的虚假平衡过零点即虚假平衡点得到了消除,并且输入输出静特性曲线的单调特性得到实现,具有重要的理论和实用价值.To solve the closure of certain channels in magnetically modulating DC current comparator,which is the caused by the false balance point,the principle of the double-loop magnetic detector was presented.The double-loop magnetic detector was composed of the magnetic amplifier loop and the magnetic modulator loop.The input-output characteristic of the magnetic modulator could be improved by that of the magnetic amplifier.Therefore,the output signal of the double-loop magnetic detector could possesse not only the high sensitivity of the magnetic modulator output signal,but also the monotonic feature of the magnetic amplifier output signal.The input-output characteristic of the experimental model of the double-loop magnetic detector was measured in the practical experiment,and the Simulink simulation model of the double-loop magnetic detector was built.Experiment and simulation results prove that the false balance zero crossing points,namely the false balance points are eliminated,in comparison with the traditional magnetic modulator.Besides,the monotonous property in the characteristic curve of the double-loop magnetic detector can be obtained.The conclusions give important theoretical and practical value.

关 键 词：磁调制器 多通道比较仪 双回路磁检测器 通道封闭 Simulink仿真模型 

分 类 号：TM93[电气工程—电力电子与电力传动]