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公开(公告)号：US11469040B2
公开(公告)日：2022-10-11
申请号：US16893152
申请日：2020-06-04
Applicant: Apple Inc.
Inventor： Saining Ren , Christopher S. Graham , Makiko K. Brzezinski , Rohan Dayal , Paul J. Thompson
Abstract: This application relates to a wireless charger with increased efficiency during operation. The wireless charging assembly includes a wireless charger and an electronic device. A transmitter coil in the wireless charger can induct magnetic flux to a receiver coil in the electronic device via a magnetic flux pathway.
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公开(公告)号：US20210383966A1
公开(公告)日：2021-12-09
申请号：US16893152
申请日：2020-06-04
Applicant: Apple Inc.
Inventor： Saining Ren , Christopher S. Graham , Makiko K. Brzezinski , Rohan Dayal , Paul J. Thompson
Abstract: This application relates to a wireless charger with increased efficiency during operation. The wireless charging assembly includes a wireless charger and an electronic device. A transmitter coil in the wireless charger can induct magnetic flux to a receiver coil in the electronic device via a magnetic flux pathway.
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公开(公告)号：US10734840B2
公开(公告)日：2020-08-04
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：US20180294682A1
公开(公告)日：2018-10-11
申请号：US15829850
申请日：2017-12-01
Applicant: Apple Inc.
Inventor： Weihong Qiu , Rohan Dayal , Zaki Moussaoui
Abstract: Disclosed are devices, systems, and methods for reducing common mode noise induced in wireless charging circuits of electronic devices. For an electronic device having an inductive receiving coil near an electric shielding layer, differences in parasitic capacitances of the loops of the inductive receiving coil with an electric shielding layer can induce common mode noise. Common mode noise is reduced by a noise-reduction capacitor from the inductive receiving coil to the electric shielding layer together with a grounding resistor from the electric shielding layer to a common ground of the wireless charging circuit.
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公开(公告)号：US11133696B2
公开(公告)日：2021-09-28
申请号：US16424331
申请日：2019-05-28
Applicant: Apple Inc.
Inventor： Narendra S. Mehta , Stephen C. Terry , Rohan Dayal
Abstract: A battery case has first and second coils on opposing sides of a battery and has switching circuitry that is coupled between the first and second coils. The battery case has a battery that provides supplemental battery power wirelessly to a wireless power receiving device via the second coil when the switching circuitry is in an open state. The case can also receive power wirelessly with the first coil from a wireless charging mat when the switching circuitry is in the open state. In a closed state, the switching circuitry shorts the first and second coils together so that current flowing through the first coil flows through the second coil in series and so that wireless power from the wireless charging mat that is received with the first coil is transmitted wirelessly to the wireless power receiving device using the second coil.
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Patent Agency Ranking
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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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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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：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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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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