Challenges in High Current Measurements Using Magnetic Flux Concentrator and Hall Effect Current Sensor 2019-26-0106
Accurate and safe current measurement in electric and hybrid electric vehicles impose several challenges in conventional shunt based measurement technique due to presence of high voltages coupled with very high currents. Many researchers have proposed contactless current sensing method based upon hall effect using magnetic flux concentrators for DC current sensing. There is need of practical approach and optimization of core dimension and sensors. This paper deals with the practical development of sensor based upon magnetic modelling with parameters such as study of effects of core dimension, air gap, core material and hysteresis on the performance of sensor characteristics. The influence of dimension and material along with temperature on saturation current, residual magnetism influence on sensor characteristics are studied, with aim of low power consumption, high sensitivity, and mechanical flexibility of sensor. We have performed simulation and experimental study for four different core materials with two geometries along with couple of sensors. This gives a practical approach for optimization of sensor for industrial product development. The modelling is performed in finite element method (FEM) and Comsol Multiphysics software. The simulation and experimental results are compared for influence of above parameters and which will help to give guideline for optimized and efficient sensor. The sensor is designed for current sense for value upto 100 A. The calculation of the current is based on the electromagnetic theory and Hall-effect theorem.