公开(公告)号：US10978911B2

公开(公告)日：2021-04-13

申请号：US15841111

申请日：2017-12-13

Applicant: Apple Inc.

Inventor： Saining Ren

IPC: H02J50/12 ,  H01F38/14 ,  H01F27/02 ,  H01F27/24 ,  H02J50/90 ,  H02J50/50 ,  H02J7/00 ,  H02J50/10 ,  H02J7/02 ,  H02J50/40

Abstract: An inductive power transfer (IPT) system may include an inductive power transmitter having at least one power transmitting coil that generates an IPT field and an IPT director unit over the inductive power transmitter. The IPT director unit may include a low reluctance element such as a magnetic core configured to direct the IPT field from the inductive power transmitter to an inductive power receiver held in place over the IPT director unit (e.g., by a housing of the IPT director unit). While the IPT director unit directs the IPT field from the inductive power transmitter to the inductive power receiver, a mean direction and density of the IPT field entering the low reluctance element from the inductive power transmitter may be different from the mean direction and density of the IPT field exiting the low reluctance element towards the inductive power receiver.

公开(公告)号：US10608470B2

公开(公告)日：2020-03-31

申请号：US14439340

申请日：2013-10-29

Applicant: Apple Inc.

Inventor： Saining Ren ,  Lawrence Bernardo Dela Cruz ,  Daniel Robertson

IPC: H02J50/00 ,  H02J50/12 ,  H02J7/02 ,  H04B5/00

Abstract: An inductive power transfer receiver is provided including a receiving coil (13) in series with a capacitor (14), a voltage multiplier (15) for providing a DC output, and a power control switch (18) controlled by a controller (19) for regulating the power supplied to a load. An inductive power transfer receiver is provided including a receiving coil in series with a capacitor, a charge pump for providing a DC output, and a power control switch controlled by a controller for regulating the power supplied to a load. A method of power flow control in an inductive power transfer circuit having a power control switch is also provided. The method includes detecting two operational transitions in the circuit and determining a reference timing bases on which operational transition is detected earliest within a detection window. The reference timing is used to developing a signal for controlling the power control switch.

公开(公告)号：US20190341797A1

公开(公告)日：2019-11-07

申请号：US16137286

申请日：2018-09-20

Applicant: Apple Inc.

Inventor： Ron Rafer Floresca ,  Saining Ren ,  Michael Scott Eckert ,  Daniel Lorenz Huber ,  Selestino Langi Rodan ,  Lawrence Bernardo dela Cruz

IPC: H02J7/02 ,  H02J50/10 ,  H02J7/00 ,  H02M3/158

Abstract: An inductive power receiving device configured to: supply power received with a power receiving coil to a load in a first mode; determine whether a converter voltage exceeds a threshold voltage; in response to the determining the converter voltage exceeds the threshold voltage after sending a charging mode request, switch to supplying power received with the power receiving coil to the load in a second mode; and in response to determining the converter voltage coil exceeds the threshold voltage before sending the charging mode request is sent, prevent at least a portion of the power received with the power receiving coil from reaching the load. An inductive power transmitting device configured to provide an alternating current voltage to a power transmitting coil and gradually increase the voltage after receiving a charging mode request and stop gradually increasing the voltage once an inductive power receiving device changes modes.

公开(公告)号：US10038389B2

公开(公告)日：2018-07-31

申请号：US15479219

申请日：2017-04-04

Applicant: Apple Inc.

Inventor： Daniel James Robertson ,  Saining Ren ,  Eugenio Sia Lecias

IPC: H02M3/335 ,  H02M3/337 ,  H02M7/537 ,  H02J50/12 ,  H02M7/48 ,  H02J17/00

Abstract: A method for controlling a converter including a resonant circuit, where the converter is controlled such that control switches are switched into a first state at the occurrence of an event that is related to a dependent variable of the converter and are switched into a second state at the occurrence of an event that is not related to a dependent variable of the converter, and the method may be employed in a converter or an inductive power transfer transmitter.

公开(公告)号：US11996698B2

公开(公告)日：2024-05-28

申请号：US17819668

申请日：2022-08-15

Applicant: Apple Inc.

Inventor： Shaoge Zang ,  Zonghong Hu ,  Saining Ren ,  Ho Fai Leung ,  Aiguo Hu ,  Qi Zhu ,  Botunga Arachchige Rajith Chaminda Abeywardana ,  Lei Zhao

IPC: H02J50/05 ,  H02J50/40 ,  H02J50/80 ,  H04B5/22 ,  H04B5/79

CPC classification number: H02J50/05 ,  H02J50/40 ,  H02J50/80 ,  H04B5/22 ,  H04B5/79

Abstract: A capacitive power transfer system can include a power transmitter having one or more primary side filter components, a communications modulator, and transmitter capacitive couplers; and a power receiver having receiver capacitive couplers capacitively coupled to the transmitter capacitive couplers, one or more secondary side filter components, and a communication demodulator. The one or more primary side filter components and the one or more secondary side filter components can be selected to provide power amplifier operation at a power delivery frequency and act as a stable gain high pass filter above a communications cutoff frequency that is higher than the power delivery frequency.

公开(公告)号：US20220407355A1

公开(公告)日：2022-12-22

申请号：US17655329

申请日：2022-03-17

Applicant: Apple Inc.

Inventor： Makiko Kawamura Brzezinski ,  Eric X. Zhou ,  Brennan K. Vanden Hoek ,  Saining Ren

IPC: H02J50/10 ,  H02J50/00 ,  H02J50/70 ,  H02J7/00 ,  H01F27/28 ,  H01F38/14

Abstract: In a wireless charging system, a transmitter coil of a wireless charger device and a receiver coil of a portable electronic device can operate at either of two different operating frequencies. The low frequency can be in a range from about 300 kHz to about 400 kHz, and the high frequency can be in a range from about 1 MHz to about 2 MHz. To provide efficient charging at both frequencies, the transmitter and receiver coils can be formed from a compound, or multi-stranded, wire.

公开(公告)号：US11043853B2

公开(公告)日：2021-06-22

申请号：US15981814

申请日：2018-05-16

Applicant: Apple Inc.

Inventor： Liang Chen ,  Andrew Gray ,  Arunim Kumar ,  Zachary Strachan Harris ,  Antoin J. Russell ,  Bharat K. Patel ,  Saining Ren ,  Jerald Polestico Guillermo ,  Ron Rafer Floresca

IPC: H02J50/60 ,  H02J7/02 ,  H04B5/00 ,  H02J50/12 ,  H02J50/40 ,  H02J50/10 ,  H02J7/00

Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using an output circuit that includes a wireless power transmitting coil. Measurement circuitry is coupled to the output circuit to help determine whether the wireless power receiving device is present and ready to accept transmission of wireless power. Oscillator circuitry for supplying signals to the output circuitry while making measurements with the measurement circuitry is coupled to the output circuit using an impedance injection network. The impedance injection network includes an inductor and a resistor coupled in series. Control circuitry opens a transistor in the output circuit when making measurements with the measurement circuitry and closes the transistor when transmitting the wireless power signals.

公开(公告)号：US10923959B2

公开(公告)日：2021-02-16

申请号：US16505370

申请日：2019-07-08

Applicant: Apple Inc.

Inventor： Saining Ren ,  Ho Fai Leung

IPC: H02J50/12 ,  H02J50/80 ,  H04B5/00 ,  H02J7/02 ,  H02J5/00

Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with coils for transmitting wireless power signals. The wireless power receiving device may be a cellular telephone or other device with coils for receiving the transmitted wireless power signals. The wireless power receiving device has adjustable rectifier circuitry coupled to a pair of coils. The pair of coils is coupled in series at a node. A transistor is coupled between ground and the node and is controlled by control circuitry. The state of the transistor can be changed to place the adjustable rectifier circuitry in either a first mode of operation in which the adjustable rectifier circuitry forms a full-bridge rectifier or a second mode of operation in which the adjustable rectifier circuitry forms a pair of parallel half-bridge rectifiers.

公开(公告)号：US20200321809A1

公开(公告)日：2020-10-08

申请号：US16505370

申请日：2019-07-08

Applicant: Apple Inc.

Inventor： Saining Ren ,  Ho Fai Leung

IPC: H02J50/80 ,  H02J50/12 ,  H02J5/00 ,  H02J7/02 ,  H04B5/00

Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device may be a wireless charging mat or other device with coils for transmitting wireless power signals. The wireless power receiving device may be a cellular telephone or other device with coils for receiving the transmitted wireless power signals. The wireless power receiving device has adjustable rectifier circuitry coupled to a pair of coils. The pair of coils is coupled in series at a node. A transistor is coupled between ground and the node and is controlled by control circuitry. The state of the transistor can be changed to place the adjustable rectifier circuitry in either a first mode of operation in which the adjustable rectifier circuitry forms a full-bridge rectifier or a second mode of operation in which the adjustable rectifier circuitry forms a pair of parallel half-bridge rectifiers.

公开(公告)号：US10593468B2

公开(公告)日：2020-03-17

申请号：US16134812

申请日：2018-09-18

Applicant: Apple Inc.

Inventor： Liang Chen ,  Saining Ren

IPC: H02J7/00 ,  H01F27/34 ,  H02J50/12 ,  H02J7/02 ,  H01F27/06 ,  H01F27/24 ,  H01F27/28

Abstract: An inductive power transfer assembly comprising a magnetic core having a base portion, a first limb, and a second limb, wherein the first limb and the second limb extend, in a direction, from a surface of the base portion a first power transfer coil and a second power transfer coil, wherein the first power transfer coil is wound about the first limb, and wherein the second power transfer coil is wound about the second limb; and inverter circuitry connected to the first power transfer coil and the second power transfer coil, wherein the inverter circuitry, during operation, causes the first power transfer coil and the second power transfer coil to generate flux having opposing polarity.