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    Wireless charging system with a switchable magnetic core
    1.
    发明授权
    Wireless charging system with a switchable magnetic core 有权

    公开(公告)号：US12014857B2

    公开(公告)日：2024-06-18

    申请号：US17179603

    申请日：2021-02-19

    Applicant: Apple Inc.

    Inventor： Zaki Moussaoui ,  Zelin Xu ,  Matthew J. Chabalko ,  Nan Liu

    IPC: H02J7/00 ,  H01F27/24 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/90

    CPC classification number: H01F27/24 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/90

    Abstract: An electronic device in a wireless power system may be operable with a removable accessory such as a case. The device may convey wireless power to, from, or through the case while the device is coupled to the case. The device may have coplanar power transmitting and power receiving coils. The removable accessory may have an embedded switchable ferrimagnetic core and a coil that overlaps the switchable ferrimagnetic core. The switchable ferrimagnetic core may be operable in a first state where the switchable ferrimagnetic core is unsaturated. The switchable ferrimagnetic core may be operable in a second state where the switchable ferrimagnetic core is saturated by a magnetic field from a permanent magnet in a wireless power transmitting device. In the second state, the switchable ferrimagnetic core may have a lower magnetic permeability and higher magnetic reluctance than in the first state.

    FOREIGN OBJECT DETECTION DURING WIRELESS POWER TRANSMISSION
    2.
    发明公开
    FOREIGN OBJECT DETECTION DURING WIRELESS POWER TRANSMISSION 审中-公开

    公开(公告)号：US20240097501A1

    公开(公告)日：2024-03-21

    申请号：US18062143

    申请日：2022-12-06

    Applicant: Apple Inc.

    Inventor： Nan Liu ,  Aijun Qin ,  Ge Wang ,  Jinqian Yu ,  Kunal Bhargava ,  Patrin K. Illenberger ,  Rex P. Huang

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

    CPC classification number: H02J50/60 ,  H02J50/10 ,  H02J50/80 ,  H02J2207/20 ,  H04B5/0037

    Abstract: A wireless power transmitter can include a wireless power transfer coil designed to magnetically couple with a corresponding coil in a wireless power receiver to facilitate wireless power transfer from the wireless power transmitter to the wireless power receiver, a power converter configured to drive the wireless power transfer coil, and control and communications circuitry coupled to the wireless power transfer coil and the power converter. The control and communications circuitry can be configured to operate the power converter to drive the wireless power transfer coil so as to transfer power to the wireless power receiver in accordance with a negotiated power transfer. Simultaneously during power transfer, the control and communications circuitry can send a polling signal to detect a foreign object including a wireless transponder and reduce or stop wireless power transfer upon receiving a response to the polling signal from a foreign object including a wireless transponder.

    Through-Display Wireless Charging
    4.
    发明申请
    Through-Display Wireless Charging 有权

    公开(公告)号：US20210408826A1

    公开(公告)日：2021-12-30

    申请号：US17217451

    申请日：2021-03-30

    Applicant: Apple Inc.

    Inventor： Nan Liu ,  Madhusudanan Keezhveedi Sampath ,  Robert Scritzky ,  Gianpaolo Lisi ,  Saining Ren ,  Kunal Bhargava ,  Zaki Moussaoui ,  Zelin Xu

    IPC: H02J50/10 ,  H02J7/02 ,  H02J7/00 ,  H02J50/00 ,  G06F3/0354 ,  G06F3/038 ,  G06F1/16 ,  G06F1/18

    Abstract: A personal electronic device (e.g., a tablet computer) may be configured to wirelessly charge an accessory (e.g., a stylus) through a display face of the device. At least a portion of the display face may be transparent to facilitate display viewing. A wireless charging assembly disposed within the enclosure may include a core having one or more windings disposed thereon, which may be configured to generate a magnetic flux above the display face to couple to the accessory. The core may be a pot core, a modified pot core, or may have another shape, such as a PQ core. The one or more windings may be disposed on one or more posts of a pot core, or additionally or alternatively, may be disposed on another portion of the core. A metallic shield may be disposed about the wireless charging assembly, thereby surrounding multiple sides of the wireless charging assembly.

    Wireless Power System With Coupling-Coefficient-Based Coil Selection
    6.
    发明申请
    Wireless Power System With Coupling-Coefficient-Based Coil Selection 审中-公开

    公开(公告)号：US20200321811A1

    公开(公告)日：2020-10-08

    申请号：US16909904

    申请日：2020-06-23

    Applicant: Apple Inc.

    Inventor： Nan Liu ,  Dmitry Berdnikov ,  Weihong Qiu ,  Zaki Moussaoui

    IPC: H02J50/80 ,  H02J50/10

    Abstract: A wireless power system may have a wireless power transmitting device and a wireless power receiving device. The wireless power receiving device may have a receive coil that receives wireless power signals from the wireless power transmitting device and may have a rectifier that produces direct-current power from the received wireless power signals. The wireless power transmitting device may have an array of transmit coils. Each transmit coil has a respective magnetic coupling coefficient characterizing its magnetic coupling with the receive coil. The wireless power transmitting device may have control circuitry that uses the magnetic coupling coefficient values in selecting transmit coils to use in transmitting wireless power to the wireless power receiving device.

    Wireless Charging System With Multiple Communications Modes
    7.
    发明申请
    Wireless Charging System With Multiple Communications Modes 审中-公开

    公开(公告)号：US20200044491A1

    公开(公告)日：2020-02-06

    申请号：US16196975

    申请日：2018-11-20

    Applicant: Apple Inc.

    Inventor： Weihong Qiu ,  Nan Liu ,  Dmitry Berdnikov ,  Zaki Moussaoui ,  Rex Huang

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

    Abstract: A wireless power transmission system has a wireless power receiving device that can be charged using multiple different types of wireless power transmitting devices. The different types of wireless power transmitting devices have power transmitting coils that exhibit different levels of magnetic coupling with the power receiving coil of the wireless power receiving device. The wireless power receiving device may include capacitors, resistors, and/or other loading circuits that can be independently switched into use depending on the level of magnetic coupling that is detected, on a rectified voltage level, on the size of the output load, and/or on information conveyed during handshaking operations to present a desired impedance adjustment at the power receiving coil so that data signal can be properly conveyed between the power receiving device and the power transmitting device.

    Wireless Charging System with a Switchable Magnetic Core
    8.
    发明公开
    Wireless Charging System with a Switchable Magnetic Core 审中-公开

    公开(公告)号：US20240296989A1

    公开(公告)日：2024-09-05

    申请号：US18661432

    申请日：2024-05-10

    Applicant: Apple Inc.

    Inventor： Zaki Moussaoui ,  Zelin Xu ,  Matthew J. Chabalko ,  Nan Liu

    IPC: H01F27/24 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/90

    CPC classification number: H01F27/24 ,  H01F38/14 ,  H02J7/02 ,  H02J50/12 ,  H02J50/90

    Abstract: An electronic device in a wireless power system may be operable with a removable accessory such as a case. The device may convey wireless power to, from, or through the case while the device is coupled to the case. The device may have coplanar power transmitting and power receiving coils. The removable accessory may have an embedded switchable ferrimagnetic core and a coil that overlaps the switchable ferrimagnetic core. The switchable ferrimagnetic core may be operable in a first state where the switchable ferrimagnetic core is unsaturated. The switchable ferrimagnetic core may be operable in a second state where the switchable ferrimagnetic core is saturated by a magnetic field from a permanent magnet in a wireless power transmitting device. In the second state, the switchable ferrimagnetic core may have a lower magnetic permeability and higher magnetic reluctance than in the first state.

    Wireless Charging System with a Switchable Magnetic Core
    10.
    发明申请
    Wireless Charging System with a Switchable Magnetic Core 有权

    公开(公告)号：US20210398733A1

    公开(公告)日：2021-12-23

    申请号：US17179603

    申请日：2021-02-19

    Applicant: Apple Inc.

    Inventor： Zaki Moussaoui ,  Zelin Xu ,  Matthew J. Chabalko ,  Nan Liu

    IPC: H01F27/24 ,  H02J7/02 ,  H02J50/12 ,  H01F38/14 ,  H02J50/90

    Abstract: An electronic device in a wireless power system may be operable with a removable accessory such as a case. The device may convey wireless power to, from, or through the case while the device is coupled to the case. The device may have coplanar power transmitting and power receiving coils. The removable accessory may have an embedded switchable ferrimagnetic core and a coil that overlaps the switchable ferrimagnetic core. The switchable ferrimagnetic core may be operable in a first state where the switchable ferrimagnetic core is unsaturated. The switchable ferrimagnetic core may be operable in a second state where the switchable ferrimagnetic core is saturated by a magnetic field from a permanent magnet in a wireless power transmitting device. In the second state, the switchable ferrimagnetic core may have a lower magnetic permeability and higher magnetic reluctance than in the first state.

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