公开(公告)号：US10608470B2

公开(公告)日：2020-03-31

申请号：US14439340

申请日：2013-10-29

Applicant: Apple Inc.

Inventor： Saining Ren ,  Lawrence Bernardo Dela Cruz ,  Daniel Robertson

IPC: H02J50/00 ,  H02J50/12 ,  H02J7/02 ,  H04B5/00

Abstract: An inductive power transfer receiver is provided including a receiving coil (13) in series with a capacitor (14), a voltage multiplier (15) for providing a DC output, and a power control switch (18) controlled by a controller (19) for regulating the power supplied to a load. An inductive power transfer receiver is provided including a receiving coil in series with a capacitor, a charge pump for providing a DC output, and a power control switch controlled by a controller for regulating the power supplied to a load. A method of power flow control in an inductive power transfer circuit having a power control switch is also provided. The method includes detecting two operational transitions in the circuit and determining a reference timing bases on which operational transition is detected earliest within a detection window. The reference timing is used to developing a signal for controlling the power control switch.

公开(公告)号：US20210050750A1

公开(公告)日：2021-02-18

申请号：US17085846

申请日：2020-10-30

Applicant: Apple Inc.

Inventor： Kunal Bhargava ,  Fady Mishriki ,  Saining Ren ,  Daniel Robertson ,  Nigel James Gray ,  Rex Huang

IPC: H02J50/90 ,  H01F38/14 ,  H02J50/10 ,  H02J50/40

Abstract: In an inductively coupled power transmitter a force detector that detects the presence of a potential device by monitoring forces applied to a surface of the power transmitter and activates the inductively coupled power transmitter upon detection of a potential device. An inductively coupled power transmitter having a proximity detector that detects the presence and location of a potential device by monitoring the proximity of devices to a surface of the power transmitter and activates the inductively coupled power transmitter upon detection of a potential device. The transmitter preferably has one or more detection coils each having an area much greater than that of the transmitter coils for detecting the presence of a potential device. An inductively coupled power transmitter including a plurality of transmitter coils proximate a charging surface and a controller selecting and driving a combination of transmitter coils providing the coupling between the power transmitter and a power receiver meeting a selection criteria.