Foreign Object Detection for LCC-S Wireless Power Transfer System Based on LSTM

A simple foreign object detection (FOD) method for LCC-S wireless power transfer (WPT) system utilizing the long short-term memory (LSTM) is proposed. In this paper, the WPT charging system which was built for electronic devices resonates around 199 kHz. At different distances and misalignment, it was tested with and without the presence of the foreign object (a beverage can). The long short-term memory based FOD method is validated, which only requires the measurement of primary inverter currents in the introduced WPT system. The proposed approach achieves good performance on the low power WPT system with an accuracy of about 95%.