Hysteresis Compensation Method for Measurement Error of Hall Effect Current Sensor Considering Eddy Current Effect for Electric Vehicle at High Speed

In the hall effect current sensor, the core is excited by the magneto-motive force which is generated by the load current, and the hall element installed in the air gap measures the magnetic flux density in the form of the voltage which is proportional to the load current. In this study, the hysteresis phenomenon including the eddy current in the magnetic core is analyzed using the Preisach model when the load current is very high up to 1000 Hz in the traction inverter for electric vehicle (EV). A hysteresis compensation method is proposed to remove measurement error in the current sensor. Therefore, the proposed method considering hysteresis and eddy current was verified through simulation and experiments, and the validity of the hysteresis compensation method is confirmed.