公开(公告)号：US11374431B2

公开(公告)日：2022-06-28

申请号：US16779155

申请日：2020-01-31

Applicant: Apple Inc.

Inventor： Aaron Rex Keith ,  Arunim Kumar ,  Junbo Zeng ,  Lewis Freeth Harpham ,  Paul David Marson ,  Sander Vocke ,  Ya-Ting Wang

IPC: H02J50/12 ,  H02J50/80 ,  H02J50/40 ,  H02J7/00 ,  H02J7/02 ,  H02J7/04

Abstract: A system for inductive power transfer that may selectively transmit power in a plurality of modes based on characteristics of a power receiver and determine which transmitter coils to drive based on received signal strength information. The inductive power transfer transmitter may detect characteristics of the power receiver in order to control the mode of the power transfer and selectively control which transmitter coils are driven based on signal strength information received from a power receiver. The power transmitter may have slugs formed of a magnetically permeable material within common coil winding openings and the transmitter coils may consists of a plurality of parallel windings.

公开(公告)号：US10601251B2

公开(公告)日：2020-03-24

申请号：US15503547

申请日：2015-08-12

Applicant: Apple Inc.

Inventor： Aaron Rex Keith ,  Arunim Kumar ,  Junbo Zeng ,  Lewis Freeth Harpham ,  Paul David Marson ,  Sander Vocke ,  Ya-Ting Wang

IPC: H02J50/12 ,  H02J50/40 ,  H02J50/80 ,  H02J7/02 ,  H02J7/04 ,  H02J7/00

Abstract: A system for inductive power transfer that may selectively transmit power in a plurality of modes based on characteristics of a power receiver and determine which transmitter coils to drive based on received signal strength information. The inductive power transfer transmitter may detect characteristics of the power receiver in order to control the mode of the power transfer and selectively control which transmitter coils are driven based on signal strength information received from a power receiver. The power transmitter may have slugs formed of a magnetically permeable material within common coil winding openings and the transmitter coils may consists of a plurality of parallel windings.

公开(公告)号：US10020687B2

公开(公告)日：2018-07-10

申请号：US15113591

申请日：2015-01-22

Applicant: Apple Inc.

Inventor： Eugenio Jr. Sia Lecias ,  Junbo Zeng ,  Saining Ren ,  Daniel James Robertson ,  Michael Nasa ,  Ron Rafer Floresca ,  Arunim Kumar ,  Ali Abdolkhani

IPC: H02J50/12 ,  H02J50/40 ,  H01F38/14 ,  H02J7/02 ,  H02J5/00 ,  H02J50/80 ,  H02M7/06 ,  H02J50/70

CPC classification number: H02J50/12 ,  H01F38/14 ,  H02J5/005 ,  H02J7/025 ,  H02J50/40 ,  H02J50/70 ,  H02J50/80 ,  H02M7/06

Abstract: An inductive power transfer device including: a resonant circuit, having a power transfer coil and a power transfer capacitor; a coupling coil, magnetically-coupled to the power transfer coil; a variable impedance; and a controller configured to determine the impedance value of the variable impedance based on predetermined criteria including: substantially regulating power provided to a load; tuning the resonant circuit resonant frequency substantially to a predetermined frequency; adjusting a frequency of a magnetic field associated with the power transfer coil; and/or adjusting an impedance reflected by the power transfer coil to a corresponding coupled power transfer coil.