公开(公告)号：US10270280B2

公开(公告)日：2019-04-23

申请号：US15035804

申请日：2014-11-07

Applicant: Apple Inc.

Inventor： Arunim Kumar ,  Nigel Gray

IPC: H02J50/12 ,  H02J7/02 ,  H02J7/04 ,  H04B5/00 ,  H02J50/60 ,  H02J17/00 ,  H02J50/80 ,  H02J50/90 ,  H02J7/00 ,  H02J7/34

Abstract: There is provided a contactless power system, power receiver and method of operating such, in which the power receiver of the system is configured to receive power transmitted by a power transmitter of the system via contactless electromagnetic coupling of respective receiving and transmitting coils. The power receiver further has circuitry for reflecting a unique magnetic signal to the transmitting coil of the power transmitter upon receipt of a power pulse by the receiver coil of the power receiver.