首页>
外国专利>
Wireless power transmission device and foreign object detection coil thereof for detecting metallic foreign object
Wireless power transmission device and foreign object detection coil thereof for detecting metallic foreign object
展开▼
机译:用于检测金属异物的无线电力传输装置及其异物检测线圈
展开▼
页面导航
摘要
著录项
相似文献
摘要
A wireless power transmission device radiates electromagnetic waves through a transmission antenna and generates multiple sensed signals by using multiple foreign object detection (FOD) coils for detecting metallic foreign object to sense the electromagnetic waves. Each FOD coil has three coil units connected in series to and spaced apart from one another. The radiation pattern of the transmission antenna overlaps a sensing range of the FOD coils. A controller of the wireless power transmission device determines if any metallic foreign object enters the radiation range of the transmission antenna according to a reference voltage signal and sensed signals of the cells, and stops the generation of electromagnetic waves when determining entry of metallic foreign object into the radiation range to avoid the metallic foreign object to be heated by the electromagnetic waves.
展开▼