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公开(公告)号：US20210057938A1
公开(公告)日：2021-02-25
申请号：US16867460
申请日：2020-05-05
Applicant: Apple Inc.
Inventor： Antoin J. Russell , Jukka-pekka J. Sjoeroos , Zaki Moussaoui
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 one or more wireless power transmitting coils for transmitting wireless power signals. The wireless power receiving device may be a portable electronic device with one or more wireless power receiving coils for receiving the transmitted wireless power signals. The wireless power transmitting device may have foreign object detection coils. Q-factor measurements may be made on the transmitting coil during wireless power transmission and/or voltage measurements may be made using the foreign object detection coils to detect whether a foreign object is present. The foreign object detection coils may include overlapping coils with different winding patterns to enhance foreign object detection coverage.
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公开(公告)号：US20180337549A1
公开(公告)日：2018-11-22
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
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.
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公开(公告)号：US20180219431A1
公开(公告)日：2018-08-02
申请号：US15885411
申请日：2018-01-31
Applicant: Apple Inc.
Inventor： Jerald Polestico Guillermo , Previn D. Nair , Mikhal S. De Jesus , Antoin J. Russell
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. The wireless power receiving device has a wireless power receiving coil in a resonant circuit that resonates at a wireless power receiving circuit resonant frequency. The wireless power transmitting device has coils. The coils are supplied with a drive signal in bursts to detect external objects. Measurement circuitry includes an oscillator for supplying the drive signals and a peak detector and analog-to-digital converter for gathering measurements on the coils to which the drive signals have been supplied. Rate-based-filtering is applied to output signals from the analog-to-digital converter to distinguish between temperature drift effects and object placement effects. The frequency of the drive signals is slightly greater than the wireless power receiving circuit resonant frequency.
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公开(公告)号：US12184111B2
公开(公告)日：2024-12-31
申请号：US18154383
申请日：2023-01-13
Applicant: Apple Inc.
Inventor： Ye Li , Antoin J. Russell , Stephen C. Terry , Adam L. Schwartz , Sumant Ranganathan , Gianpaolo Lisi
Abstract: A wireless power transmitter can include a coil, an inverter coupled to the coil, and control circuitry coupled to the inverter that, responsive to receiving a burst request pulse from a wireless power receiver, initiates inverter operation, driving the coil and powering the receiver. The control circuitry can operate inverter switches so bandwidth of the wireless power transfer signal falls within a specified range by: (a) extending a minimum on time of the switches, (b) modifying pulse width modulation (PWM) drive signals supplied to the switches to shape a coil current burst envelope, and/or (c) modifying PWM signal amplitude supplied to the switches. Modifying the PWM drive signals can include using a symmetrical PWM scheme in which the positive and negative pulses are symmetrical in width on a cycle-by-cycle basis or using a complementary PWM scheme in which the positive and negative pulse widths are complementary on a cycle-by-cycle basis.
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Patent Agency Ranking
公开(公告)号：US11605985B2
公开(公告)日：2023-03-14
申请号：US16867460
申请日：2020-05-05
Applicant: Apple Inc.
Inventor： Antoin J. Russell , Jukka-pekka J. Sjoeroos , Zaki Moussaoui
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 one or more wireless power transmitting coils for transmitting wireless power signals. The wireless power receiving device may be a portable electronic device with one or more wireless power receiving coils for receiving the transmitted wireless power signals. The wireless power transmitting device may have foreign object detection coils. Q-factor measurements may be made on the transmitting coil during wireless power transmission and/or voltage measurements may be made using the foreign object detection coils to detect whether a foreign object is present. The foreign object detection coils may include overlapping coils with different winding patterns to enhance foreign object detection coverage.
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公开(公告)号：US20200083755A1
公开(公告)日：2020-03-12
申请号：US16680678
申请日：2019-11-12
Applicant: Apple Inc.
Inventor： Jerald Polestico Guillermo , Previn D. Nair , Mikhal S. De Jesus , Antoin J. Russell
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. The wireless power receiving device has a wireless power receiving coil in a resonant circuit that resonates at a wireless power receiving circuit resonant frequency. The wireless power transmitting device has coils. The coils are supplied with a drive signal in bursts to detect external objects. Measurement circuitry includes an oscillator for supplying the drive signals and a peak detector and analog-to-digital converter for gathering measurements on the coils to which the drive signals have been supplied. Rate-based-filtering is applied to output signals from the analog-to-digital converter to distinguish between temperature drift effects and object placement effects. The frequency of the drive signals is slightly greater than the wireless power receiving circuit resonant frequency.
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公开(公告)号：US10511197B2
公开(公告)日：2019-12-17
申请号：US15885411
申请日：2018-01-31
Applicant: Apple Inc.
Inventor： Jerald Polestico Guillermo , Previn D. Nair , Mikhal S. De Jesus , Antoin J. Russell
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. The wireless power receiving device has a wireless power receiving coil in a resonant circuit that resonates at a wireless power receiving circuit resonant frequency. The wireless power transmitting device has coils. The coils are supplied with a drive signal in bursts to detect external objects. Measurement circuitry includes an oscillator for supplying the drive signals and a peak detector and analog-to-digital converter for gathering measurements on the coils to which the drive signals have been supplied. Rate-based-filtering is applied to output signals from the analog-to-digital converter to distinguish between temperature drift effects and object placement effects. The frequency of the drive signals is slightly greater than the wireless power receiving circuit resonant frequency.
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公开(公告)号：US10320241B2
公开(公告)日：2019-06-11
申请号：US15967285
申请日：2018-04-30
Applicant: Apple Inc.
Inventor： Liang Chen , Andrew Gray , Arunim Kumar , Zachary Strachan Harris , Antoin J. Russell , Bharat K. Patel
Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device using output circuitry that includes an array of wireless power transmitting coils that form a wireless charging surface. During wireless power transmission operations, wireless power signals are transmitted from the array of coils to a wireless power receiving device on the charging surface. Inductance measurement circuitry such as impulse response measurement circuitry and other measurement circuitry is coupled to the output circuitry. Control circuitry in the wireless power transmitting device analyzes signals from the measurement circuitry to produce two-dimensional signal profiles across the wireless charging surface and to compare patterns in these signal profiles to predetermined signal patterns associated with the presence of known power receiving equipment on the wireless charging surface. Based on the analysis, charging parameters may be adjusted or other actions taken.
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公开(公告)号：US20180219430A1
公开(公告)日：2018-08-02
申请号：US15804145
申请日：2017-11-06
Applicant: Apple Inc.
Inventor： Antoin J. Russell , Bharat K. Patel , Manisha P. Pandya , Zaki Moussaoui
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. The measurement circuitry includes a measurement circuit that is coupled to the output circuit and that measures signals while oscillator circuitry supplies the output circuit with signals at a probe frequency. The measurement circuitry also includes a measurement circuit that is coupled to the output circuit and that measures signals while the oscillator circuitry sweeps signals applied to the output circuit between a first frequency and a second frequency to detect sensitive devices such as radio-frequency identification devices. Impulse response circuitry in the measurement circuitry is used to make inductance and Q factor measurements.
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