公开(公告)号：US12261449B2

公开(公告)日：2025-03-25

申请号：US17650602

申请日：2022-02-10

Applicant: Apple Inc.

Inventor： Ruiyang Lin ,  Matthew J Chabalko ,  Zaki Moussaoui ,  Adam L Schwartz

IPC: H02J50/00 ,  H01F7/02 ,  H02J50/10

Abstract: An accessory for improving wireless power transfer efficiency in a wireless power transfer system can include a magnetic (e.g., ferrite) core dimensioned and positioned so as to reduce flux coupling from the PTx winding into friendly metal of the PRx and/or to enhance flux coupling from the PTx winding to the PRx winding. The core may define an aperture corresponding to an outer dimension (e.g., outer diameter) of the PRx winding. The core may further have an outer dimension selected to intercept sufficient flux to reduce flux coupling into the friendly metal of the PRx, such as an outer dimension corresponding to an outer dimension (e.g., outer diameter) of the PTx winding. The accessory may be a case for the PRx device or may be configured to be affixed to the face of the PTx device and may also include one or more alignment fixtures.

公开(公告)号：US12051918B2

公开(公告)日：2024-07-30

申请号：US18166839

申请日：2023-02-09

Applicant: Apple Inc.

Inventor： Shubha Ramakrishnan ,  Adam L Schwartz ,  Jizhen Fu

IPC: H02J50/60 ,  H02J50/10 ,  H02J50/80

CPC classification number: H02J50/60 ,  H02J50/10 ,  H02J50/80

Abstract: A wireless power transfer device can include a coil that couples to a corresponding coil of a counterpart device to facilitate wireless power transfer, a power converter coupled to the coil, and controller and communication circuitry that monitors one or more observable parameters associated with the wireless power transfer to detect a presence of a foreign object that is not the counterpart device and control the power converter responsive to detection of a foreign object. The controller and communication circuitry can perform foreign object detection based on power accounting that includes estimating friendly metal losses associated with the counterpart device. The controller and communication circuitry can receive from the counterpart device friendly metal loss modeling parameters associated with the counterpart device, the modeling parameters including one or more coefficients relating to a wireless power transfer current and one or more coefficients relating to a wireless power transfer voltage.

公开(公告)号：US12184088B1

公开(公告)日：2024-12-31

申请号：US18166832

申请日：2023-02-09

Applicant: Apple Inc.

Inventor： Shubha Ramakrishnan ,  Adam L Schwartz

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/80 ,  H04B5/79

Abstract: A wireless power transfer device can include a coil that couples to a corresponding coil of a counterpart device to facilitate wireless power transfer, a power converter coupled to the coil, and controller and communication circuitry that monitors one or more observable parameters associated with the wireless power transfer to detect a presence of a foreign object that is not the counterpart device and controls the power converter responsive to detection of the foreign object. The controller and communication circuitry can perform foreign object detection based on power accounting that includes estimating friendly metal losses associated with the counterpart device. The controller and communication circuitry can interrogate a machine readable tag associated with a case of the counterpart device and can receive from the machine readable tag information about the presence or properties of the case. The machine readable tag can be an NFC tag.

公开(公告)号：US20240186836A1

公开(公告)日：2024-06-06

申请号：US18164745

申请日：2023-02-06

Applicant: Apple Inc.

Inventor： Ruiyang Lin ,  Adam L Schwartz

IPC: H02J50/40 ,  H02J50/00 ,  H02J50/12

CPC classification number: H02J50/402 ,  H02J50/005 ,  H02J50/12

Abstract: A multi-coil wireless power transfer (WPT) arrangement can include a magnetic core; first and second WPT coils positioned adjacent one another above the magnetic core; a third WPT coil positioned above the first and second wireless power transfer coils; a magnet ring located above the first and second wireless power transfer coils; additional magnetic core material disposed atop the magnetic core and associated with the third WPT coil. The first and second WPT coils can be separated by a separation distance selected to accommodate the additional magnetic core material; and a segmented metallic shield positioned between the magnet ring and the first and second wireless power transfer coils. The additional magnetic core material can include a base portion disposed atop the magnetic core and beneath the third wireless power transfer coil and/or a post portion disposed atop the base portion and within the third wireless power transfer coil.

公开(公告)号：US20240106280A1

公开(公告)日：2024-03-28

申请号：US18166839

申请日：2023-02-09

Applicant: Apple Inc.

Inventor： Shubha Ramakrishnan ,  Adam L Schwartz ,  Jizhen Fu

IPC: H02J50/60 ,  H02J50/10 ,  H02J50/80

CPC classification number: H02J50/60 ,  H02J50/10 ,  H02J50/80

Abstract: A wireless power transfer device can include a coil that couples to a corresponding coil of a counterpart device to facilitate wireless power transfer, a power converter coupled to the coil, and controller and communication circuitry that monitors one or more observable parameters associated with the wireless power transfer to detect a presence of a foreign object that is not the counterpart device and control the power converter responsive to detection of a foreign object. The controller and communication circuitry can perform foreign object detection based on power accounting that includes estimating friendly metal losses associated with the counterpart device. The controller and communication circuitry can receive from the counterpart device friendly metal loss modeling parameters associated with the counterpart device, the modeling parameters including one or more coefficients relating to a wireless power transfer current and one or more coefficients relating to a wireless power transfer voltage.