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公开(公告)号：US11190050B2
公开(公告)日：2021-11-30
申请号：US16213852
申请日：2018-12-07
Applicant: Apple Inc.
Inventor： Gianpaolo Lisi , Madhusudanan Keezhveedi Sampath , Nan Liu , Tianqi Li , YiBo Liu , Yasin Aalipour
Abstract: An inductive power transmitter is provided that includes a power transmitting coil which includes transmission circuitry coupled to the power transmitting coil. The inductive power transmitter is configured to produce an inductive power transfer (IPT) signal having an IPT power so that the power transmitting coil generates an IPT field to transfer wireless power to a power receiving coil of an inductive power receiver. The inductive power transmitter includes detection circuitry coupled to the transmission circuitry and is configured to detect one or more indications of a magnetic field strength of a leakage IPT field. The inductive power transmitter includes control circuitry configured to control the transmission circuitry while the transmission circuitry is increasing the IPT power towards a charge level sufficient to charge a battery associated with the inductive power receiver at a target charge rate.
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公开(公告)号：US10811913B2
公开(公告)日：2020-10-20
申请号：US16196975
申请日：2018-11-20
Applicant: Apple Inc.
Inventor： Weihong Qiu , Nan Liu , Dmitry Berdnikov , Zaki Moussaoui , Rex Huang
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.
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公开(公告)号：US10725515B2
公开(公告)日：2020-07-28
申请号：US16127046
申请日：2018-09-10
Applicant: Apple Inc.
Inventor： Blake R. Marshall , Florence W. Ow , Joel N. Ruscher , Liquan Tan , Aidan N. Zimmerman , Reza Nasiri Mahalati , Hao Zhu , Qigen Ji , Madhusudanan Keezhveedi Sampath , Nan Liu , Robert Scritzky , Gianpaolo Lisi
IPC: H01F7/14 , G06F1/26 , H02J50/10 , H02J7/02 , G06F3/038 , H01F27/36 , H02J50/90 , G06F3/0354 , H01F38/14 , H01F7/02 , G06F1/16
Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.
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公开(公告)号：US20190278349A1
公开(公告)日：2019-09-12
申请号：US16422894
申请日：2019-05-24
Applicant: Apple Inc.
Inventor： Blake R. Marshall , Florence W. Ow , Joel N. Ruscher , Liquan Tan , Aidan N. Zimmerman , Reza Nasiri Mahalati , Hao Zhu , Qigen Ji , Madhusudanan Keezhveedi Sampath , Nan Liu , Robert Scritzky , Gianpaolo Lisi
IPC: G06F1/26 , H01F38/14 , H02J50/10 , H01F27/36 , G06F3/0354 , H02J50/90 , G06F3/038 , G06F1/16 , H01F7/02 , H02J7/02
Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.
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公开(公告)号：US20190067978A1
公开(公告)日：2019-02-28
申请号：US15868877
申请日：2018-01-11
Applicant: Apple Inc.
Inventor： Nan Liu , Rohan Dayal , Weihong Qiu , Zaki Moussaoui
Abstract: A wireless power system may use a wireless power transmitting device to transmit wireless power to a wireless power receiving device. The wireless power transmitting device may have an array of coils that extend under a wireless charging surface. Control circuitry may supply alternating-current control signals to inverters. The inverters are coupled to resonant circuits. Each resonant circuit includes a capacitor coupled to a respective one of the coils. During operation, wireless power signals are transmitted from the coils to the wireless power receiving device through the charging surface. The capacitor associated with each resonant circuit may potentially be individually selected to enhanced uniformity of the wireless power transmitting device. The array of coils may have multiple layers and the capacitors in each layer may have different respective values.
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Patent Agency Ranking
公开(公告)号：US20210384754A1
公开(公告)日：2021-12-09
申请号：US17179647
申请日：2021-02-19
Applicant: Apple Inc.
Inventor： Zelin Xu , Nan Liu , Zaki Moussaoui , Gianpaolo Lisi , Kunal Bhargava , Madhusudanan Keezhveedi Sampath , Matthew J. Chabalko , Robert Scritzky
Abstract: A device in a wireless power system may be operable with a removable accessory such as a case. The device may transmit or receive wireless power through the case while the electronic device is coupled to the case. The case may have a folio shape with a front cover portion that covers the display of the electronic device. The case may have an embedded ferrimagnetic core that relays magnetic flux during wireless power transfer operations. Magnetic alignment structures in the case may position the ferrimagnetic core in the case in a high magnetic flux density region between the power transmitting device and the power receiving device. The ferrimagnetic core relays the magnetic flux between a transmitting coil in the power transmitting device and a receiving coil in the power receiving device. The ferrimagnetic core may be formed in a front portion, a sidewall, or a rear wall of a case.
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公开(公告)号：US10923955B2
公开(公告)日：2021-02-16
申请号：US15868877
申请日：2018-01-11
Applicant: Apple Inc.
Inventor： Nan Liu , Rohan Dayal , Weihong Qiu , Zaki Moussaoui
Abstract: A wireless power system may use a wireless power transmitting device to transmit wireless power to a wireless power receiving device. The wireless power transmitting device may have an array of coils that extend under a wireless charging surface. Control circuitry may supply alternating-current control signals to inverters. The inverters are coupled to resonant circuits. Each resonant circuit includes a capacitor coupled to a respective one of the coils. During operation, wireless power signals are transmitted from the coils to the wireless power receiving device through the charging surface. The capacitor associated with each resonant circuit may potentially be individually selected to enhanced uniformity of the wireless power transmitting device. The array of coils may have multiple layers and the capacitors in each layer may have different respective values.
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公开(公告)号：US20190138073A1
公开(公告)日：2019-05-09
申请号：US16127072
申请日：2018-09-10
Applicant: Apple Inc.
Inventor： Blake R. Marshall , Florence W. Ow , Joel N. Ruscher , Liquan Tan , Aidan N. Zimmerman , Reza Nasiri Mahalati , Hao Zhu , Qigen Ji , Madhusudanan Keezhveedi Sampath , Nan Liu , Robert Scritzky , Gianpaolo Lisi
Abstract: Embodiments describe a receiving element that includes a ferromagnetic structure axially symmetrical around a central axis disposed along a length of the ferromagnetic structure. The ferromagnetic structure includes a groove region defining two end regions on opposing sides of the groove region, where the groove region has a smaller length than the two end regions. The receiving element also includes an inductor coil wound about the groove region of the ferromagnetic structure and in between the two end regions.
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公开(公告)号：US20190067992A1
公开(公告)日：2019-02-28
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：US20180069601A1
公开(公告)日：2018-03-08
申请号：US15697151
申请日：2017-09-06
Applicant: Apple Inc.
Inventor： Weihong Qiu , Stefan A. Kowalski , Christopher S. Graham , Eric S. Jol , Zaki Moussaoui , Nan Liu
CPC classification number: H04B5/0037 , H01F27/2823 , H01F27/365 , H01F27/38 , H01F38/14 , H02J7/025 , H02J50/10 , H02J50/40 , H04B5/0087
Abstract: This disclosure relates to the inductive charging of portable electronic devices. In particular, a charging assembly is disclosed that allows a portable electronic device to be charged in multiple orientations with respect to a charging device. The charging assembly includes two or more separate inductive receiving coils. The inductive receiving coils can be arranged orthogonally with respect to one another by wrapping one or more secondary receiving coils around a ferritic core having two legs extending in different directions from a joint region. By orienting the receiving coils orthogonally with respect to one another, the likelihood of at least one of the receiving coils being aligned with a charging field emitted by a charging device increases substantially.
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