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 |