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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：US20230327495A1
公开(公告)日：2023-10-12
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：US11735962B2
公开(公告)日：2023-08-22
申请号：US17198116
申请日：2021-03-10
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：US20220224219A1
公开(公告)日：2022-07-14
申请号：US17450910
申请日：2021-10-14
Applicant: Apple Inc.
Inventor： Yanhui Xie , Asif Hussain , Jingdong Chen , Zhiyuan Hu
Abstract: A battery powered electronic device can include a battery to power one or more loads, a first DC-DC converter having an input coupled to the battery and an output, and a second DC-DC converter cascaded with the first DC-DC converter and coupled to a second load subject to pulsed operation. The first and second converters may be configured so as to isolate the one or more loads from transients associated with the pulsed operation of the second load. The second converter may have an input coupled to the output of the first converter and an output coupled to the second load. Alternatively, the second converter may be a bidirectional converter having first terminals coupled to the output of the first converter and second terminals coupled to an energy storage device.
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公开(公告)号：US12119675B2
公开(公告)日：2024-10-15
申请号：US17834180
申请日：2022-06-07
Applicant: Apple Inc.
Inventor： Zhiyuan Hu , Alin I. Gherghescu , Arash Mehrabi , Dmitry Berdnikov
CPC classification number: H02J50/80 , H02J7/00712 , H02J50/10
Abstract: Portable electronic devices such as cellular telephones, wristwatch devices, tablet computers, wireless earbuds, and other portable devices use batteries. The batteries in these devices may be charged using a wireless power system. For example, a user may place devices such as tablet computers and cellular telephones on a wireless charging puck or mat to wirelessly charge these devices. Wireless power systems include a power transmitting device and a power receiving device. Coils in the power transmitting and receiving devices are used to transmit and receive wireless power signals. The coupling between the transmitting and receiving coils may affect the wireless charging efficiency and the power produced in the receiving device. Disclosed herein are feedback control schemes to optimize efficiency of wireless power transfer systems.
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Patent Agency Ranking
公开(公告)号：US20220376616A1
公开(公告)日：2022-11-24
申请号：US17324307
申请日：2021-05-19
Applicant: Apple Inc.
Inventor： Zhiyuan Hu , Jingdong Chen , Yanhui Xie , Asif Hussain
Abstract: Power converters can include a plurality of switching devices and a combination of one or more inductors and one or more flying capacitors. Both boost and buck converters may employ such topologies, and can achieve high efficiency and small size in at least some applications, including those with high conversion ratios. A control circuit can generate a first pair of complementary gate drive signals to drive a first complementary switch pairs and a second pair of complementary gate drive signals to drive a second complementary switch pair. The control circuit can vary a phase shift between the first pair of complementary gate drive signals and the second pair of complementary gate drive signals to regulate the flying capacitor voltage.
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公开(公告)号：US20240250561A1
公开(公告)日：2024-07-25
申请号：US18624598
申请日：2024-04-02
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：US11689094B2
公开(公告)日：2023-06-27
申请号：US17324307
申请日：2021-05-19
Applicant: Apple Inc.
Inventor： Zhiyuan Hu , Jingdong Chen , Yanhui Xie , Asif Hussain
CPC classification number: H02M1/0095 , H02M3/07 , H02M7/4837
Abstract: Power converters can include a plurality of switching devices and a combination of one or more inductors and one or more flying capacitors. Both boost and buck converters may employ such topologies, and can achieve high efficiency and small size in at least some applications, including those with high conversion ratios. A control circuit can generate a first pair of complementary gate drive signals to drive a first complementary switch pairs and a second pair of complementary gate drive signals to drive a second complementary switch pair. The control circuit can vary a phase shift between the first pair of complementary gate drive signals and the second pair of complementary gate drive signals to regulate the flying capacitor voltage.
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公开(公告)号：US20220407369A1
公开(公告)日：2022-12-22
申请号：US17834180
申请日：2022-06-07
Applicant: Apple Inc.
Inventor： Zhiyuan Hu , Alin I. Gherghescu , Arash Mehrabi , Dmitry Berdnikov
Abstract: Portable electronic devices such as cellular telephones, wristwatch devices, tablet computers, wireless earbuds, and other portable devices use batteries. The batteries in these devices may be charged using a wireless power system. For example, a user may place devices such as tablet computers and cellular telephones on a wireless charging puck or mat to wirelessly charge these devices. Wireless power systems include a power transmitting device and a power receiving device. Coils in the power transmitting and receiving devices are used to transmit and receive wireless power signals. The coupling between the transmitting and receiving coils may affect the wireless charging efficiency and the power produced in the receiving device. Disclosed herein are feedback control schemes to optimize efficiency of wireless power transfer systems.
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公开(公告)号：US20240266886A1
公开(公告)日：2024-08-08
申请号：US18638123
申请日：2024-04-17
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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