磁势自平衡回馈补偿式直流传感器的灵敏度分析

Sensitivity Analysis of DC Sensor Based on Self-balance of Magnetic Potential and Feedback Compensation

论述了磁势自平衡回馈补偿式直流传感器检测回路的工作原理,利用一对检测铁芯和线圈对一次被测电流和二次平衡电流磁势之差进行检测。运用曲线拟合的方法得出差值补偿回路的开环输入输出特性函数表达式,研究了检测铁心线圈在半波激磁状态下的检测灵敏度特性。

Detection circuit's principle of DC sensor based on self-balance of magnetic potential and feedback compensation is discussed.The difference of primary measured current and secondary balanced current is detected applying a pair of detection cores and coils.The open loop input and output characteristic's function expression of difference compensation circuit is obtained applying curve fitting.The detection sensitivity characteristic of detect coils is studied in loop state.