Adaptive Magnetic Field Compensation for High-Precision Current Sensing in Eccentricity-Prone Circular Hall Sensor Arrays
Year: 2025
Type: article
Abstract: This paper addresses the conductor eccentricity error inherent in circular array Hall-effect current sensors through a novel magnetic field compensation algorithm that synergizes numerical integration and adaptive conductor position estimation. The algorithm's efficacy was validated via MATLAB simulations and a 1000A DC test platform featuring DSP real-time processing. By implementing an automatic feedback loop that monitors Hall element voltage variations (DAQ 6510 acquisition) and dynamically adjusts magnetic field coefficients, the method reduces measurement errors from 4.5% (uncompensated) to 0.6% FS (Full Scale) -- an 86.7% accuracy improvement. Experimental results under ±500A bidirectional currents and 0-2cm eccentric displacements confirm compliance with IEC 61869-10 Class 0.5 requirements (<1% error), demonstrating exceptional robustness against mechanical misalignment in high-density applications like EV powertrains (500A/mm² current density) and aerospace power systems.
Source: IEEE Sensors Journal
Authors: Yue Tang, Chaobo Min, Jiajia Lu, Shuo Quan
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,645
OpenAlex ID: W4415125546