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公开(公告)号：US20180062416A1
公开(公告)日：2018-03-01
申请号：US15485078
申请日：2017-04-11
Applicant: Apple Inc.
Inventor： Stephen C. Terry , Nilay D. Jani , Bin Gu , Yongxuan Hu
Abstract: A wireless power transmitting device may transmit power wirelessly to a wireless power receiving device. The wireless power receiving device may be a portable electronic device with an array of wireless power receiving coils that receive wireless power from wireless power transmitting coils in the wireless power transmitting device. Each receiving coil in the array of wireless power receiving coils may be coupled to a respective rectifier. Control circuitry of the wireless power receiving device may be configured to determine which rectifiers to enable for synchronous rectification. The control circuitry may be configured to enable at least one rectifier based on the alternating-current voltages produced by each coil in the array of receiving coils. The control circuitry may also be configured to enable at least one rectifier based on the output current from each rectifier.
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公开(公告)号：US20230420998A1
公开(公告)日：2023-12-28
申请号：US17883401
申请日：2022-08-08
Applicant: Apple Inc.
Inventor： Stephen C. Terry , Zaid A. AbuKhalaf
CPC classification number: H02J50/80 , H02J50/12 , H04B10/612
Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The devices in the wireless power system may communicate using in-band communication. The wireless power transmitting device may transmit data to the wireless power receiving device using frequency-shift keying (FSK) modulation. The receiving device may not be aware of the transmission rate of the FSK data. The FSK decoder may identify an actual transmission rate of the incoming bits and decode the wireless power signals into subsequent bits using the actual transmission rate.
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公开(公告)号：US11764621B1
公开(公告)日：2023-09-19
申请号：US17457374
申请日：2021-12-02
Applicant: Apple Inc.
Inventor： Yongxuan Hu , Nileshbhai J. Shah , José V. Santos Martinez , Stephen C. Terry
Abstract: A wireless power transmitter can include an inverter that receives a DC input and generates an AC output to drive a wireless power transmit coil coupled to an output of the inverter as well as voltage and current sensors that measure the DC input. The wireless power transmitter can further include a power management accumulator including hardware that receives voltage and current samples from the voltage and current sensors and multiplies corresponding voltage and current samples to produce power samples and memory locations that store corresponding voltage, current, and power samples. The wireless power transmitter can still further include a programmable controller that controls switching devices of the inverter responsive at least in part to the voltage, current and power samples stored in the memory locations of the power management accumulator.
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公开(公告)号：US20230170717A1
公开(公告)日：2023-06-01
申请号：US18154383
申请日：2023-01-13
Applicant: Apple Inc.
Inventor： Ye Li , Antoin J. Russell , Stephen C. Terry , Adam L. Schwartz , Sumant Ranganathan , Gianpaolo Lisi
CPC classification number: H02J7/00711 , H02J50/80 , H02J50/70 , H02J50/12
Abstract: A wireless power transmitter can include a coil, an inverter coupled to the coil, and control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates inverter operation, driving the coil and powering the receiver. The control circuitry can operate inverter switches so bandwidth of the wireless power transfer signal falls within a specified range by: (a) extending a minimum on time of the switches, (b) modifying pulse width modulation (PWM) drive signals supplied to the switches to shape a coil current burst envelope, and/or (c) modifying PWM signal amplitude supplied to the switches. Modifying the PWM drive signals can include using a symmetrical PWM scheme in which the positive and negative pulses are symmetrical in width on a cycle-by-cycle basis or using a complementary PWM scheme in which the positive and negative pulse widths are complementary on a cycle-by-cycle basis.
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公开(公告)号：US20190341796A1
公开(公告)日：2019-11-07
申请号：US16125611
申请日：2018-09-07
Applicant: Apple Inc.
Inventor： Bin Gu , Yongxuan Hu , Stephen C. Terry , Di Zhao , Ruchi J. Parikh , Michael D. Black , Weiyun Chen
Abstract: An electronic device may receive or provide power using bidirectional wired and wireless power converters. A bypass path may be included to bypass the battery charger and to allow direct power transfers from a connector of the electronic device to the wireless power converter or from the wireless power converter to the connector of the electronic device. Current limiting and regulation circuitry may also be included.
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Patent Agency Ranking
公开(公告)号：US20190312459A1
公开(公告)日：2019-10-10
申请号：US16051350
申请日：2018-07-31
Applicant: Apple Inc.
Inventor： Brandon R. Garbus , Daniel Huber , Jason P. Marini , Stephen C. Terry , YiBo Liu
IPC: H02J50/10 , H02J7/02 , G06F3/0354
Abstract: A wireless power system has a wireless power transmitting device that uses an inverter to apply alternating-current signals to a coil. In response, the coil generates wireless power signals that are received by a coil in a wireless power receiving circuit of a wireless power receiving device. While wireless power is being transferred to the receiving device, the receiving device communicates with the wireless power transmitting device using in-band communications. The wireless power receiving device can issue a halt-wireless-power-transmission command using in-band communications to direct the wireless power transmitting device to stop transmitting wireless power. When power is not being transferred, the wireless power transmitting device transmits a series of short impulses that are monitored by the receiving device. The receiving device can direct the transmitting device to resume power transmission by adjusting an adjustable impedance circuit coupled to the wireless power receiving circuit.
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公开(公告)号：US20190190324A1
公开(公告)日：2019-06-20
申请号：US16326883
申请日：2017-09-20
Applicant: Apple Inc.
Inventor： Chad A. Bossetti , Christopher S. Graham , David W. Ritter , Todd K. Moyer , Steven G. Herbst , Shimon Elkayam , Nileshbhai J. Shah , Stephen C. Terry , Zaki Moussaoui
CPC classification number: H02J50/90 , G01D5/16 , G01D5/20 , G01D5/24 , H01L41/1132 , H02J7/025 , H02J50/10 , H02J50/12 , H02J50/40
Abstract: A wireless charging mat and method of operating the same. The wireless charging mat includes a detection system configured to determine a location and an orientation of an electronic device on the wireless charging mat. The location and orientation are determined based on detected locations of one or more structural features of the electronic device. The wireless charging mat is operated according to the detected location and orientation.
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公开(公告)号：US11984737B2
公开(公告)日：2024-05-14
申请号：US18336555
申请日：2023-06-16
Applicant: Apple Inc.
Inventor： Adam L. Schwartz , Alireza Safaee , Stephen C. Terry , Zhiyuan Hu
Abstract: A wireless charging system having a power transmitter may wirelessly transfer power to a power receiver. Shield saturation, such as saturation of a ferrite structure, in the wireless power receiver may occur under some operating conditions. Saturation can lead to disruptive oscillations in power transfer. The power transmitting may include control circuitry for detecting and mitigating saturation.
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公开(公告)号：US11316383B1
公开(公告)日：2022-04-26
申请号：US16925207
申请日：2020-07-09
Applicant: Apple Inc.
Inventor： Stephen C. Terry
Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device during wireless power transmission periods. During alternating foreign object detection periods, the wireless power transmitting device gathers signals from the wireless power transmitting coil to detect foreign objects. Another wireless power transmitting device may transmit signals that can cause interference. To help reduce interference, the wireless power transmitting device gathers signals with a sensing coil that is separate from the wireless power transmitting coil and subtracts these signals from signals gathered with the wireless power transmitting coil. A signal quality metric may be used in adjusting the timing of the foreign object detection periods to help avoid interference from the other wireless power transmitting device.
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公开(公告)号：US11183864B2
公开(公告)日：2021-11-23
申请号：US16125611
申请日：2018-09-07
Applicant: Apple Inc.
Inventor： Bin Gu , Yongxuan Hu , Stephen C. Terry , Di Zhao , Ruchi J. Parikh , Michael D. Black , Weiyun Chen
Abstract: An electronic device may receive or provide power using bidirectional wired and wireless power converters. A bypass path may be included to bypass the battery charger and to allow direct power transfers from a connector of the electronic device to the wireless power converter or from the wireless power converter to the connector of the electronic device. Current limiting and regulation circuitry may also be included.
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