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公开(公告)号：US10734847B2
公开(公告)日：2020-08-04
申请号：US15880214
申请日：2018-01-25
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：US20200036229A1
公开(公告)日：2020-01-30
申请号：US16513583
申请日：2019-07-16
Applicant: Apple Inc.
Inventor： Christopher M. Pinciuc , Dmitry Berdnikov , Jukka-pekka J. Sjoeroos , Sumant Ranganathan , Weihong Qiu , Zaki Moussaoui
Abstract: A power system has a wireless power transmitting device and a wireless power receiving device. Coils in the transmitting device may include a circular coil overlapped by first and second rectangular coils at a charging surface. The rectangular coils each include straight segments extending over a central region of the circular coil. Control circuitry can activate the circular coil to transmit wireless power to a first type of wireless power receiving coil using vertical components of the magnetic field generated by the circular coil. The control circuitry can activate the rectangular coils to transmit wireless power to a second type of wireless power receiving coil using horizontal components of the magnetic field generated by the rectangular coils. The circular and rectangular coils wirelessly charge the power receiving device while located at the same position on the charging surface, regardless of the type of wireless power receiving coil that is used.
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公开(公告)号：US10256733B2
公开(公告)日：2019-04-09
申请号：US15200898
申请日：2016-07-01
Applicant: Apple Inc.
Inventor： Weihong Qiu , Rohan Dayal , Zaki Moussaoui
Abstract: This disclosure relates to power converters capable of providing multiple output voltage levels. With respect to USB-C adapter design, the converter's output may need to be changed between different voltage levels, e.g., a low voltage (such as 5V, 10V), an intermediate voltage (such as 12V, 20V), or a high voltage (such as 20V, 40V)—based on the charging device's request. By using a tapped-winding transformer, the turns-ratio of a flyback transformer may be intelligently selected for high output voltage ranges, thus enabling the duty cycle to be kept the same for the low and intermediate voltage output levels. The flyback converter would then only need to accommodate the intermediate and high output voltages. For high output voltages, a switch may be activated to put the two windings of the transformer in series; for lower output voltages, the switch may be turned off, such that only one winding is used.
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44.发明申请公开(公告)号：US20180219421A1
公开(公告)日：2018-08-02
申请号：US15690121
申请日：2017-08-29
Applicant: Apple Inc.
Inventor： Heng Yang , Weihong Qiu , Zaki Moussaoui
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 receiving device has a wireless power receiving coil and the wireless power transmitting device has a wireless power transmitting coil array. Control circuitry in the transmitting device uses inverter circuitry to supply alternating-current signals to coils in the coil array, thereby transmitting wireless power signals. Impulse response measurement circuitry coupled to the coil array is used to make impulse response measurements while the control circuitry uses the inverter circuitry to apply impulse signals to each of the coils. The control circuitry analyzes output from the impulse response measurement circuitry to measure inductances associated with the coils in the coil array.
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公开(公告)号：US20180013310A1
公开(公告)日：2018-01-11
申请号：US15473453
申请日：2017-03-29
Applicant: Apple Inc.
Inventor： Zaki Moussaoui , Rohan Dayal , Weihong Qiu
Abstract: A wireless power transmitting device may have an array of transmitting coils to transmit power wirelessly to a wireless power receiving device having an array of wireless power receiving coils. The receiving device may have a rectifier that receives alternating-current signals from the wireless power receiving coils and provides corresponding rectified direct-current voltage signals to a capacitor and other circuitry. The rectifier circuitry may include bridge circuits each of which is coupled between a respective coil in the array of wireless power receiving coils and the capacitor. The wireless power transmitting coils may be arranged in a hexagonally tiled array. The wireless power receiving coils may include first, second, and third coils that are aligned with respective vertices in an equilateral triangle having sides with lengths equal to half of the center-to-center spacing of the hexagonally tiled transmitting coils.
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Patent Agency Ranking
公开(公告)号：US20170093290A1
公开(公告)日：2017-03-30
申请号：US15200898
申请日：2016-07-01
Applicant: Apple Inc.
Inventor： Weihong Qiu , Rohan Dayal , Zaki Moussaoui
CPC classification number: H02M3/33507 , H02M1/08 , H02M3/335 , H02M3/33576
Abstract: This disclosure relates to power converters capable of providing multiple output voltage levels. With respect to USB-C adapter design, the converter's output may need to be changed between different voltage levels, e.g., a low voltage (such as 5V, 10V), an intermediate voltage (such as 12V, 20V), or a high voltage (such as 20V, 40V)—based on the charging device's request. By using a tapped-winding transformer, the turns-ratio of a flyback transformer may be intelligently selected for high output voltage ranges, thus enabling the duty cycle to be kept the same for the low and intermediate voltage output levels. The flyback converter would then only need to accommodate the intermediate and high output voltages. For high output voltages, a switch may be activated to put the two windings of the transformer in series; for lower output voltages, the switch may be turned off, such that only one winding is used.
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公开(公告)号：US12046920B2
公开(公告)日：2024-07-23
申请号：US17306716
申请日：2021-05-03
Applicant: Apple Inc.
Inventor： Jukka-pekka J. Sjoeroos , Antoin J. Russell , Zaki Moussaoui
CPC classification number: H02J50/50 , H02J50/80 , H04R25/602 , H02J2310/22 , H04R2225/31
Abstract: A wireless power relay can include a first wireless power receiver (Rx1) configured to receive power from a first wireless power transmitter (Tx1) in another device and a second wireless power transmitter (Tx2) configured to deliver power to a second wireless power receiver (Rx2) in another device. Rx1 may be configured to communicate with Tx1 via a first communication link, and the Tx2 may be configured to receive communication from Rx2 via a second communication link, both employing modulation of the wireless power signal. The relay may further include a power converter with its input coupled to Rx1 and its output coupled to Tx2 and a constant power controller configured to isolate modulated communication between the communication links. Additionally or alternatively, the relay may include circuitry configured to introduce a jamming signal preventing Tx1 from detecting and improperly interpreting signals from the second communications link.
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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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公开(公告)号：US11996707B2
公开(公告)日：2024-05-28
申请号：US17816081
申请日：2022-07-29
Applicant: Apple Inc.
Inventor： Lixin Shi , Zaki Moussaoui , Weihong Qiu , Zelin Xu , Matthew J Chabalko
Abstract: A wireless power transfer system can include an electronic device including a first wireless power transfer coil and wireless power transfer circuitry coupled to the wireless power transfer coil. The wireless power transfer circuitry can be capable of receiving power and transmitting power wirelessly via the first wireless power transfer coil. The system can further include an accessory device including a second wireless power transfer coil, a rectifier coupled to the second wireless power transfer coil, and an energy storage device coupled to the rectifier by a regulator circuit. The wireless power transfer circuitry can operate in a pulsed or burst wireless power transfer mode to deliver power to the accessory device.
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公开(公告)号：US20230100393A1
公开(公告)日：2023-03-30
申请号：US17816081
申请日：2022-07-29
Applicant: Apple Inc.
Inventor： Lixin Shi , Zaki Moussaoui , Weihong Qiu , Zelin Xu , Matthew J. Chabalko
Abstract: A wireless power transfer system can include an electronic device including a first wireless power transfer coil and wireless power transfer circuitry coupled to the wireless power transfer coil. The wireless power transfer circuitry can be capable of receiving power and transmitting power wirelessly via the first wireless power transfer coil. The system can further include an accessory device including a second wireless power transfer coil, a rectifier coupled to the second wireless power transfer coil, and an energy storage device coupled to the rectifier by a regulator circuit. The wireless power transfer circuitry can operate in a pulsed or burst wireless power transfer mode to deliver power to the accessory device.
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