-
公开(公告)号：US20210135507A1
公开(公告)日：2021-05-06
申请号：US16868120
申请日：2020-05-06
Applicant: Apple Inc.
Inventor： Adam L. Schwartz , Ron Rafer C. Floresca , Liang Chen , Zaki Moussaoui
Abstract: An electronic device such as a portable electronic device has wireless power receiving circuitry. A vehicle has a vehicle remote keyless system that transmits beacons. A key receives the beacons and responds with key codes to unlock doors and enable a vehicle ignition in the vehicle. In the presence of wireless power transfer operations there is a risk that wireless power signals will interfere with the reception of the beacons by the key. To ensure that beacons are satisfactorily received, conditions in which there is a risk of interference are detected and corresponding interference mitigation operations are performed.
-
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.
-
公开(公告)号：US20240039341A1
公开(公告)日：2024-02-01
申请号：US18484885
申请日：2023-10-11
Applicant: Apple Inc.
Inventor： Adam L. Schwartz , Niloofar Rashidi Mehrabadi , Hossein Sepahvand
Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device. The wireless power transmitting device determines whether an external object is present. The external object may be a foreign object such as a coin or paperclip or may be a wireless power receiving device. External objects are detected using quality-factor measurements. Wireless communications are used to discriminate between foreign objects and wireless power receiving devices. Quality factor measurements may be compensated for aging and temperature effects using temperature measurements and compensation factors based on frequency and measured resistance.
-
公开(公告)号：US11831178B2
公开(公告)日：2023-11-28
申请号：US18327721
申请日：2023-06-01
Applicant: Apple Inc.
Inventor： Adam L. Schwartz , Niloofar Rashidi Mehrabadi , Hossein Sepahvand
Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device. The wireless power transmitting device determines whether an external object is present. The external object may be a foreign object such as a coin or paperclip or may be a wireless power receiving device. External objects are detected using quality-factor measurements. Wireless communications are used to discriminate between foreign objects and wireless power receiving devices. Quality factor measurements may be compensated for aging and temperature effects using temperature measurements and compensation factors based on frequency and measured resistance.
-
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.
-
Patent Agency Ranking
公开(公告)号：US20230307962A1
公开(公告)日：2023-09-28
申请号：US18327750
申请日：2023-06-01
Applicant: Apple Inc.
Inventor： Adam L. Schwartz , Niloofar Rashidi Mehrabadi , Hossein Sepahvand
Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device. The wireless power transmitting device determines whether an external object is present. The external object may be a foreign object such as a coin or paperclip or may be a wireless power receiving device. External objects are detected using quality-factor measurements. Wireless communications are used to discriminate between foreign objects and wireless power receiving devices. Quality factor measurements may be compensated for aging and temperature effects using temperature measurements and compensation factors based on frequency and measured resistance.
-
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.
-
公开(公告)号：US20220311286A1
公开(公告)日：2022-09-29
申请号：US17669929
申请日：2022-02-11
Applicant: Apple Inc.
Inventor： Adam L. Schwartz
Abstract: Power may be transmitted wirelessly between electronic devices. Devices such as cellular telephones, wireless charging pucks, and other equipment may have wireless power circuitry with coils. The wireless power circuitry may have inverter circuitry and rectifier circuitry. The inverter circuitry and a coil that receives alternating-current signals from the inverter circuitry may be used to transmit wireless power signals. Wireless power signals received by a coil in a mated device may be rectified using the rectifier circuitry in that device to produce direct-current power. To align first and second devices for power transfer between their coils, devices may be provided with alignment magnets. The alignment magnets may be configured to permit a first device to be mated back-to-back with a second device such as a second device of the same type as the first device.
-
公开(公告)号：US12261459B2
公开(公告)日：2025-03-25
申请号：US18327750
申请日：2023-06-01
Applicant: Apple Inc.
Inventor： Adam L. Schwartz , Niloofar Rashidi Mehrabadi , Hossein Sepahvand
Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. The wireless power transmitting device uses a wireless power transmitting coil to transmit wireless power signals to the wireless power receiving device. The wireless power transmitting device determines whether an external object is present. The external object may be a foreign object such as a coin or paperclip or may be a wireless power receiving device. External objects are detected using quality-factor measurements. Wireless communications are used to discriminate between foreign objects and wireless power receiving devices. Quality factor measurements may be compensated for aging and temperature effects using temperature measurements and compensation factors based on frequency and measured resistance.
-
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.
-
-
-
-
-
-
-
-
-
Search Results
26
records
(took 0.022 seconds)
