-
公开(公告)号：US20230170717A1
公开(公告)日：2023-06-01
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
CPC classification number: H02J7/00711 , H02J50/80 , H02J50/70 , H02J50/12
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.
-
公开(公告)号：US20210344232A1
公开(公告)日：2021-11-04
申请号：US17306716
申请日：2021-05-03
Applicant: Apple Inc.
Inventor： Jukka-pekka J. Sjoeroos , Antoin J. Russell , Zaki Moussaoui
Abstract: A wireless power relay can include a first wireless power receiver (Rx1) configured to receive power from a first wireless power transmitter (Tx1) in another device and a second wireless power transmitter (Tx2) configured to deliver power to a second wireless power receiver (Rx2) in another device. Rx1 may be configured to communicate with Tx1 via a first communication link, and the Tx2 may be configured to receive communication from Rx2 via a second communication link, both employing modulation of the wireless power signal. The relay may further include a power converter with its input coupled to Rx1 and its output coupled to Tx2 and a constant power controller configured to isolate modulated communication between the communication links. Additionally or alternatively, the relay may include circuitry configured to introduce a jamming signal preventing Tx1 from detecting and improperly interpreting signals from the second communications link.
-
公开(公告)号：US20180337557A1
公开(公告)日：2018-11-22
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.
-
公开(公告)号：US11677255B1
公开(公告)日：2023-06-13
申请号：US17644005
申请日：2021-12-13
Applicant: Apple Inc.
Inventor： Ye Li , Antoin J. Russell , Stephen C. Terry , Adam L. Schwartz , Sumant Ranganathan , Gianpaolo Lisi
CPC classification number: H02J7/00711 , H02J50/12 , H02J50/70 , H02J50/80
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.
-
公开(公告)号：US11476719B2
公开(公告)日：2022-10-18
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.
-
Patent Agency Ranking
6.发明授权公开(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
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：US12046920B2
公开(公告)日：2024-07-23
申请号：US17306716
申请日：2021-05-03
Applicant: Apple Inc.
Inventor： Jukka-pekka J. Sjoeroos , Antoin J. Russell , Zaki Moussaoui
CPC classification number: H02J50/50 , H02J50/80 , H04R25/602 , H02J2310/22 , H04R2225/31
Abstract: A wireless power relay can include a first wireless power receiver (Rx1) configured to receive power from a first wireless power transmitter (Tx1) in another device and a second wireless power transmitter (Tx2) configured to deliver power to a second wireless power receiver (Rx2) in another device. Rx1 may be configured to communicate with Tx1 via a first communication link, and the Tx2 may be configured to receive communication from Rx2 via a second communication link, both employing modulation of the wireless power signal. The relay may further include a power converter with its input coupled to Rx1 and its output coupled to Tx2 and a constant power controller configured to isolate modulated communication between the communication links. Additionally or alternatively, the relay may include circuitry configured to introduce a jamming signal preventing Tx1 from detecting and improperly interpreting signals from the second communications link.
-
公开(公告)号：US11515735B2
公开(公告)日：2022-11-29
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.
-
公开(公告)号：US10530191B2
公开(公告)日：2020-01-07
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.
-
公开(公告)号：US11462950B2
公开(公告)日：2022-10-04
申请号：US16702372
申请日：2019-12-03
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.
-
-
-
-
-
-
-
-
-
Search Results
19
records
(took 0.013 seconds)
