Foreign objects impinging on a ground transceiver assembly (GTA) of a wireless power transfer (WPT) station are detected using a two-stage foreign object detection system. In a first stage, at least one camera is positioned to observe a charging position of the GTA and an area surrounding the charging position. In a second stage, an impedance measurement circuit measures an impedance of a wireless power transfer coil of the GTA. An imaging processor analyzes images from the at least one camera to identify changes or features indicative of introduction of a foreign object onto an exposed surface of the GTA or in the area surrounding the charging position. A foreign object detection (FOD) controller triggers an impedance inspection of the GTA by the impedance measurement circuit and initiates a failsafe operation when movement of an object crossing into or over the charging position is detected.
FOREIGN OBJECT DETECTION FOR WIRELESS POWER TRANSFER SYSTEMS
FREMDKÖRPERDETEKTION FÜR DRAHTLOSE STROMÜBERTRAGUNGSSYSTEME
DÉTECTION D'OBJET ÉTRANGER POUR SYSTÈMES DE TRANSFERT D'ÉNERGIE SANS FIL
2025-02-19
Patent
Electronic Resource
English
FOREIGN OBJECT DETECTION FOR WIRELESS POWER TRANSFER SYSTEMS
European Patent Office | 2023
|FOREIGN OBJECT DETECTION FOR WIRELESS POWER TRANSFER SYSTEMS
European Patent Office | 2023
|Foreign object detection for wireless power transfer systems
European Patent Office | 2024
|Foreign object detection for wireless power transfer system
European Patent Office | 2024
|Foreign object detection in wireless energy transfer systems
European Patent Office | 2019
|