发明名称 Apparatus, system, and method for detecting a foreign object in an inductive wireless power transfer system via coupling coefficient measurement
摘要 An inductive wireless power device comprises a transmitter configured to generate an electromagnetic field to a coupling region for wireless power transfer to a receiver, and control logic configured to determine a coupling coefficient of the wireless power transfer when the receiver is within the coupling region. The control logic also determines a presence of a foreign object within the coupling region responsive to a comparison of the determined coupling coefficient and an expected coupling coefficient for the wireless power transfer. An inductive wireless power device comprises a receiver configured to couple with an electromagnetic field in a coupling region for inductive wireless power transfer from a transmitter. The receiver is configured to alter a wireless power transfer characteristic of the transmitter for a determination of a presence of a foreign object within the coupling region responsive to a determination of a coupling coefficient of the wireless power transfer.
申请公布号 US9551805(B2) 申请公布日期 2017.01.24
申请号 US201213435996 申请日期 2012.03.30
申请人 INTEGRATED DEVICE TECHNOLOGY, INC. 发明人 Singh Manjit
分类号 H01F38/00;G01V3/12;H02J5/00 主分类号 H01F38/00
代理机构 Haynes & Boone LLP 代理人 Haynes & Boone LLP
主权项 1. An inductive wireless power device, comprising: a transmitter configured to generate an electromagnetic field to a coupling region for wireless power transfer to a receiver; a predefined coupling coefficient for the wireless power transfer; and a control logic configured to determine a coupling coefficient of the wireless power transfer when the receiver is within the coupling region by detecting a change in a wireless power transfer characteristic caused by the receiver at a first time and a second time, and to determine a presence of a foreign object within the coupling region responsive to a comparison of the determined coupling coefficient and the predefined coupling coefficient for the wireless power transfer.
地址 San Jose CA US