Position-Sensorless Detection of Coil Misalignment for Wireless Static Power Charging of Electric Trains

摘要

Misalignment between coils deteriorates power transfer performance in Wireless Power Transfer (WPT) system and one way to deal with such problem is moving the coils to aligned position. To make correct position control, this paper proposes a detection method using a 2-couple coils system which combines the information from the two induced voltages in respective receiving coils to detect the position of coils. The feasibility and robustness of designed detection system is verified by simulation.