公开(公告)号：US20200083746A1

公开(公告)日：2020-03-12

申请号：US16213852

申请日：2018-12-07

Applicant: Apple Inc.

Inventor： Gianpaolo Lisi ,  Madhusudanan Keezhveedi Sampath ,  Nan Liu ,  Tianqi Li ,  YiBo Liu ,  Yasin Aalipour

IPC: H02J50/12 ,  H02J7/02 ,  H02J5/00 ,  H01F38/14

Abstract: An inductive power transmitter is provided that includes a power transmitting coil which includes transmission circuitry coupled to the power transmitting coil. The inductive power transmitter is configured to produce an inductive power transfer (IPT) signal having an IPT power so that the power transmitting coil generates an IPT field to transfer wireless power to a power receiving coil of an inductive power receiver. The inductive power transmitter includes detection circuitry coupled to the transmission circuitry and is configured to detect one or more indications of a magnetic field strength of a leakage IPT field. The inductive power transmitter includes control circuitry configured to control the transmission circuitry while the transmission circuitry is increasing the IPT power towards a charge level sufficient to charge a battery associated with the inductive power receiver at a target charge rate.

公开(公告)号：US11190050B2

公开(公告)日：2021-11-30

申请号：US16213852

申请日：2018-12-07

Applicant: Apple Inc.

Inventor： Gianpaolo Lisi ,  Madhusudanan Keezhveedi Sampath ,  Nan Liu ,  Tianqi Li ,  YiBo Liu ,  Yasin Aalipour

IPC: H02J50/12 ,  H02J7/02 ,  H01F38/14 ,  H02J5/00

Abstract: An inductive power transmitter is provided that includes a power transmitting coil which includes transmission circuitry coupled to the power transmitting coil. The inductive power transmitter is configured to produce an inductive power transfer (IPT) signal having an IPT power so that the power transmitting coil generates an IPT field to transfer wireless power to a power receiving coil of an inductive power receiver. The inductive power transmitter includes detection circuitry coupled to the transmission circuitry and is configured to detect one or more indications of a magnetic field strength of a leakage IPT field. The inductive power transmitter includes control circuitry configured to control the transmission circuitry while the transmission circuitry is increasing the IPT power towards a charge level sufficient to charge a battery associated with the inductive power receiver at a target charge rate.