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    • 10. 发明授权
    • Apparatus, system, and method for detecting a foreign object in an inductive wireless power transfer system via coupling coefficient measurement
    • 用于通过耦合系数测量在感应无线电力传输系统中检测异物的装置,系统和方法
    • US09551805B2
    • 2017-01-24
    • US13435996
    • 2012-03-30
    • Manjit Singh
    • Manjit Singh
    • H01F38/00G01V3/12H02J5/00
    • H02J50/60G01V3/12H01F38/14H02J5/005H02J7/025H02J17/00H02J50/10H02J50/12H02J50/90Y02E60/12
    • 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.
    • 感应无线电力设备包括发射机,其被配置为向耦合区域产生电磁场,用于向接收机进行无线功率传输;以及控制逻辑,被配置为当接收机在耦合区域内时确定无线功率传输的耦合系数。 响应于所确定的耦合系数和无线功率传输的预期耦合系数的比较,控制逻辑还确定耦合区域内异物的存在。 感应式无线电力设备包括被配置为与耦合区域中的电磁场耦合以用于从发射机进行感应无线电力传输的接收机。 接收机被配置为响应于确定无线功率传输的耦合系数,改变发射机的无线功率传输特性以确定耦合区域内异物的存在。