磁势自平衡回馈补偿式直流传感器难点研究  

Study on Difficulties of Direct Current Sensor Based on Magnetic Potential Self-balance and Feedback Compensation

作　　者：褚江[1] 任士焱[1] 

机构地区：[1]华中科技大学电气与电子工程学院电测教研室,武汉430074

出　　处：《电测与仪表》2006年第10期4-7,共4页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(50277018)

摘　　要：磁势自平衡回馈补偿式直流传感理论是在电抗器磁势自平衡原理与差值电流回馈补偿原理的基础上,将两者相结合而形成的一种新的传感原理与方法。为了实现基于该原理的传感器,本文首先对磁势自平衡回馈补偿式直流传感器模拟样机的工作过程进行简要介绍,重点研究分析了模拟样机线路中纹波感应干扰信号的影响及其传感器输出信号误差处理的问题。模拟样机的大量实验验证了磁势自平衡回馈补偿式直流传感理论正确性的同时,又暴露了模拟样机设计的局限性。被测直流磁势在1500～9000A T内时,通过简单的线性化处理可使模拟样机的输出误差控制在0.1%左右。The paper briefly describes the theory of direct current sensor based on magnetic potential self-balance and feedback compensation and the structure of prototype machine based on this theory. Then some difficulties of the theory and the prototype machine are chiefly studied, including the problem of inductive disturbance and error disposal of prototype machine＇s output signal,etc. Experiments of prototype machine confirm the validity of the new DC sensing theory, and also expose some limitation of the prototype machine＇s structural design. Using a simple linearization circuit, the output error of the prototype machine is close to 0.1% or less than it when the detected circuit magnetic potential is between 1500AT and 9000AT.

关 键 词：磁势平衡 回馈补偿 感应干扰 线性化 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]