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公开(公告)号：US20230420988A1
公开(公告)日：2023-12-28
申请号：US18463486
申请日：2023-09-08
Applicant: Apple Inc.
Inventor： Zaki Moussaoui , Jukka-pekka J. Sjoeroos , Weihong Qiu , Zelin Xu
CPC classification number: H02J50/005 , H02J50/12 , H02J50/90
Abstract: A wireless power system has a wireless power transmitting device and multiple wireless power receiving devices. The wireless power transmitting device may have a foldable housing. The wireless power transmitting device has wireless power coils that are used in transmitting wireless power to electronic devices such as cellular telephones, wristwatches, ear buds battery cases, ear buds, computer styluses, and other electronic devices. A rectifier can be coupled to a wireless power coil. In a first mode the coil transmits wireless power to a cellular telephone or other device. In a second mode, the coil is used in receiving wireless power from the cellular telephone or other device. The received wireless power can be retransmitted to other devices.
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32.发明授权公开(公告)号：US11710984B2
公开(公告)日：2023-07-25
申请号：US17180540
申请日：2021-02-19
Applicant: Apple Inc.
Inventor： Weihong Qiu , Zaki Moussaoui , Zelin Xu
CPC classification number: H02J50/005 , H02J50/12 , H01F27/24 , H01F27/28
Abstract: An electronic device in a wireless power system may be operable with a removable accessory such as a case. The device may have coplanar power transmitting and power receiving coils. The transmitting coil may be positioned within a central opening of the receiving coil. The removable accessory may have an embedded receiving coil configured to receive wireless power from the transmitting coil of the electronic device. The receiving coil of the electronic device may receive wireless power from a power transmitting device such as charging mat. The receiving coil of the electronic device may operate up to a higher maximum power than the transmitting coil of the electronic device. The power transmitting coil and power receiving coil in the electronic device may operate at different power transmission frequencies. To mitigate crosstalk, the power transmitting coil's operation frequency may be a non-integer multiple of the power receiving coil's operation frequency.
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公开(公告)号：US11258311B2
公开(公告)日：2022-02-22
申请号：US16909904
申请日：2020-06-23
Applicant: Apple Inc.
Inventor： Nan Liu , Dmitry Berdnikov , Weihong Qiu , Zaki Moussaoui
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.
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公开(公告)号：US20210265861A1
公开(公告)日：2021-08-26
申请号：US17127733
申请日：2020-12-18
Applicant: Apple Inc.
Inventor： Zaki Moussaoui , Jukka-pekka J. Sjoeroos , Weihong Qiu , Zelin Xu
Abstract: A wireless power system has a wireless power transmitting device and multiple wireless power receiving devices. The wireless power transmitting device may have a foldable housing. The wireless power transmitting device has wireless power coils that are used in transmitting wireless power to electronic devices such as cellular telephones, wristwatches, ear buds battery cases, ear buds, computer styluses, and other electronic devices. A rectifier can be coupled to a wireless power coil. In a first mode the coil transmits wireless power to a cellular telephone or other device. In a second mode, the coil is used in receiving wireless power from the cellular telephone or other device. The received wireless power can be retransmitted to other devices.
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公开(公告)号：US10978899B2
公开(公告)日：2021-04-13
申请号：US15884199
申请日：2018-01-30
Applicant: Apple Inc.
Inventor： Weihong Qiu , Rohan Dayal , Zaki Moussaoui
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device by supplying drive signals with a duty cycle to a wireless power transmitting coil. The wireless power receiving device has a rectifier and a wireless power receiving coil that receives wireless power signals having the duty cycle from the wireless power transmitting device. The rectifier is coupled to an integrated circuit such as a battery charger integrated circuit. The amount of current drawn by the integrated circuit from the rectifier is adjustable. During operation, control circuitry in the wireless power receiving device sets the current to multiple different values while using sensor circuitry to measure output power from the rectifier. A satisfactory value for the duty cycle can be identified by adjusting the duty cycle while observing when peaks in the output power arise as a function of the different current values.
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Patent Agency Ranking
公开(公告)号：US10770921B2
公开(公告)日：2020-09-08
申请号：US15883415
申请日：2018-01-30
Applicant: Apple Inc.
Inventor： Zaki Moussaoui , Weihong Qiu
Abstract: A wireless power transmission system has a wireless power receiving device that is located on a charging surface of a wireless power transmitting device. The wireless power transmitting device uses measurement circuitry such as coil impedance measurement circuitry or impulse-response circuitry that makes coil inductance measurements to monitor the charging surface for the presence of the wireless power receiving device. In response to detecting that the wireless power receiving device is present on the charging surface, the wireless power transmitting device and the wireless power receiving device establish a wireless communications link. The wireless power transmitting device transmits information on wireless power transmission capabilities of the wireless power transmitting device to the wirelessly power receiving device. The receiving device selects desired settings and transmits these to the transmitting device.
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公开(公告)号：US20180062442A1
公开(公告)日：2018-03-01
申请号：US15422345
申请日：2017-02-01
Applicant: Apple Inc.
Inventor： Weihong Qiu , Zaki Moussaoui , Rohan Dayal
Abstract: A transmitter device is configured to transfer energy to multiple receiver devices. The transmitter device includes multiple transmitter coils, and a shared power converter is coupled to each transmitter coil. The shared power converter includes a leading half bridge and multiple trailing half bridges. Each transmitter coil is coupled between the leading half bridge and a respective one of the trailing half bridges. The shared power converter is dynamically configurable in that the leading half bridge may be coupled to multiple trailing half bridges when energy is to be transferred wirelessly to two or more receiver devices. The leading half bridge simultaneously operates with each trailing half bridge as an independent full-bridge phase shift inverter. A signal supplied to each transmitter coil is independently regulated by controlling a phase shift of a respective trailing half bridge with respect to the leading half bridge.
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公开(公告)号：US20170373537A1
公开(公告)日：2017-12-28
申请号：US15611622
申请日：2017-06-01
Applicant: Apple Inc.
Inventor： Rohan Dayal , Weihong Qiu , Zaki Moussaoui
IPC: H02J50/10 , H04B1/3827 , H02J7/02
CPC classification number: H02J50/10 , H02J7/025 , H02J50/80 , H04B1/3827
Abstract: A wireless power transmitting device may have control circuitry that supplies drive signals to a coil to produce wireless power signals. The wireless power receiving device may have a coil that receives the transmitted wireless power signals from the wireless power transmitting device. The wireless power receiving device may have a rectifier that rectifies signals received by the coil in the wireless power receiving device and that provides a rectified voltage to a capacitor. A charger in the wireless power receiving device may charge a battery in the device using the rectified voltage. When it is desired to convey information to the wireless power transmitting device, the wireless power transmitting device may cease the transmission of wireless power and the wireless power receiving device may modulate transistors in the rectifier to transmit data to the wireless power transmitting device.
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公开(公告)号：US20250105669A1
公开(公告)日：2025-03-27
申请号：US18613196
申请日：2024-03-22
Applicant: Apple Inc.
Inventor： Jukka-pekka J Sjoeroos , Weihong Qiu
IPC: H02J50/12
Abstract: A method of operating a wireless power transmitter having a wireless power transmitting coil, an inverter that receives an input voltage and generates an AC output voltage that drives the wireless power transmitting coil, and at least one adjustable capacitance coupled to the wireless power transmitting coil to form a series tuning circuit therewith, can be performed by control circuitry of the wireless power transmitter and can include: responsive to increased power demand from a wireless power receiver, determining whether the input voltage is at a maximum value and, if so, reducing the at least one adjustable capacitance to increase gain; or responsive to decreased power demand from the wireless power receiver, determining whether the input voltage is at a minimum value and, if so, increasing the at least one adjustable capacitance to decrease gain.
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公开(公告)号：US11996767B1
公开(公告)日：2024-05-28
申请号：US17816074
申请日：2022-07-29
Applicant: Apple Inc.
Inventor： Weihong Qiu , Jun Liu , Jizhen Fu , Zaki Moussaoui
IPC: H02M1/08 , H02J50/10 , H02M1/38 , H02M7/5387 , H02M7/5395
CPC classification number: H02M1/385 , H02J50/10 , H02M1/083 , H02M7/53871 , H02M7/5395
Abstract: A method of adaptively controlling dead time between turn off of a first switching device of an inverter and turn on of a second switching device of the inverter that is a counterpart of the first switching device can include: monitoring a plurality of switching events of at least one of the first and second switching devices, storing for each monitored switching event an indication whether a dead time associated therewith permitted optimal switching, and adaptively controlling the dead time responsive to the stored indications. Monitoring a plurality of switching events of at least one of the first and second switching devices can further include sampling an output voltage of the inverter and comparing the sampled output voltage to one of a high reference voltage corresponding to a high inverter rail voltage and a low reference voltage corresponding to a low inverter rail voltage.
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