磁势自平衡回馈补偿式直流传感理论研究  

DC sensing theory and method based on self-balance of magnetic potential and feed-back compensation

作　　者：任士焱[1] 马爱清[1] 杨华云[1] 钟丹[1] 

机构地区：[1]华中科技大学电气与电子工程学院

出　　处：《华中科技大学学报（自然科学版）》2003年第11期33-35,共3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 (5 0 2 770 1 8)

摘　　要：研究了一种新型直流传感机理与方法 ,包括磁势自平衡回路和补偿回路两个环节 .分析了磁势自平衡回路在半个周期内单铁心磁势自平衡的工作过程 .通过对铁芯的磁化过程、剩磁特性及线圈的激磁状态研究 ,分析了半波磁势自平衡直流传感器的电流波形 .该系统结构简单 ,稳定可靠 ,在 40 %～ 1 0 0 %额定电流范围内 ,输出电流的相对误差不超过 0 .1 % ,其精度大大提高 .The DC sensing theory and method were studied based on the magnetic potential self-balance and feed-back compensation. The balance process of the magnetic potential self-balance circuit for the single core during half cycle was discussed. By researching the magnetization process and remanence characteristic of the core, the magnetic exciting status of winding the current wave of the system during the half cycle is analyzed. The characteristics of the device are: simple construction, good stability and reliability, and high precision (the error less than 0.1?% in range of rated current 40?%～100?%).

关 键 词：直流传感器 磁势自平衡 回馈补偿 电磁过程 

分 类 号：TM933[电气工程—电力电子与电力传动] TP212.1[自动化与计算机技术—检测技术与自动化装置]