公开(公告)号：US20250096614A1

公开(公告)日：2025-03-20

申请号：US18774201

申请日：2024-07-16

Applicant: Apple Inc.

Inventor： Shubha Ramakrishnan ,  Adam L. Schwartz ,  Brandon R. Garbus ,  Herve Grabas ,  Srinivasa V. Thirumalai Ananthan Pillai

IPC: H02J50/60 ,  G01R21/133 ,  H02J50/10

Abstract: Transmitters and/or receivers in a wireless power transfer system predict power losses to account for presence of foreign objects.

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：US20240348104A1

公开(公告)日：2024-10-17

申请号：US18756178

申请日：2024-06-27

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：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.

公开(公告)号：US20250096615A1

公开(公告)日：2025-03-20

申请号：US18787485

申请日：2024-07-29

Applicant: Apple Inc.

Inventor： Herve Grabas ,  Srinivasa V. Thirumalai Ananthan Pillai ,  Brandon R. Garbus ,  Shubha Ramakrishnan

IPC: H02J50/60 ,  G01R21/133 ,  H02J50/10

Abstract: Transmitters and/or receivers in a wireless power transfer system predict power losses to account for presence of foreign objects.

公开(公告)号：US20220320911A1

公开(公告)日：2022-10-06

申请号：US17681363

申请日：2022-02-25

Applicant: Apple Inc.

Inventor： Adam L. Schwartz ,  Ruiyang Lin ,  Shubha Ramakrishnan ,  Zaki Moussaoui ,  Weihong Qiu

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

Abstract: A wireless power system has a wireless power transmitting device with a wireless power transmitting coil and an inverter. The inverter and wireless power transmitting coil are used to transmit wireless power signals. The wireless power system also has a wireless power receiving device configured to receive the wireless power signals using a wireless power receiving coil. A rectifier in the wireless power receiving device rectifies alternating-current signals from the wireless power receiving coil and produces corresponding direct-current power. Power loss calculations may be used to help determine whether a foreign object might be present in the vicinity of a coupled wireless power transmitter and receiver. In an ecosystem with multiple models of transmitter and multiple models of receiver, model-dependent scaling factors may be maintained and exchanged between a given coupled transmitter and receiver pair to allow accurate power loss estimates to be made.