Magnetoresistance Current Inversion Algorithm Based on Single-valued Function Fitting

Aiming at the requirement of high-frequency transient current measurement in power system, a magnetic hysteresis optimization algorithm based on single-valued fitting is proposed to measure current. The algorithm is based on the data measured by tunnel junction magnetoresistance (TMR) sensor. The algorithm improves the measurement accuracy of high-frequency current amplitude by optimizing conventional algorithms. Experiments show that the optimized algorithm in this paper reduces the high-frequency current inversion error from 20% of the traditional single-valued algorithm to less than 5%, which has reference value for high-frequency current measurement.