公开(公告)号：US10978921B1

公开(公告)日：2021-04-13

申请号：US16994308

申请日：2020-08-14

Applicant: Apple Inc.

Inventor： Ge Wang ,  Stephen C. Terry ,  Wynand Malan ,  Zachary S. Harris

IPC: H02J50/80 ,  H02J50/10 ,  H04B5/00

Abstract: A wireless power system has a wireless power transmitting device and a wireless power receiving device. During digital ping operations while the transmitting device and receiving device negotiate to establish a power level to use during normal operation, low-power wireless power signals may be transmitted to the receiving device from the wireless power transmitting device. Information gathered during the digital ping may be evaluated using a wireless-power-transmission-efficiency-to-digital-ping-rectifier-output-voltage relationship and using a normal-operation-wireless-power-transmission-efficiency-to-digital-ping-wireless-power-transmission-efficiency relationship to predict a wireless power transmission efficiency that would be experienced if the system were to enter normal operation. Based on this efficiency prediction, the system can issue alerts and can decide whether or not to enter normal operation.

公开(公告)号：US20240097501A1

公开(公告)日：2024-03-21

申请号：US18062143

申请日：2022-12-06

Applicant: Apple Inc.

Inventor： Nan Liu ,  Aijun Qin ,  Ge Wang ,  Jinqian Yu ,  Kunal Bhargava ,  Patrin K. Illenberger ,  Rex P. Huang

IPC: H02J50/60 ,  H02J50/10 ,  H02J50/80

CPC classification number: H02J50/60 ,  H02J50/10 ,  H02J50/80 ,  H02J2207/20 ,  H04B5/0037

Abstract: A wireless power transmitter can include a wireless power transfer coil designed to magnetically couple with a corresponding coil in a wireless power receiver to facilitate wireless power transfer from the wireless power transmitter to the wireless power receiver, a power converter configured to drive the wireless power transfer coil, and control and communications circuitry coupled to the wireless power transfer coil and the power converter. The control and communications circuitry can be configured to operate the power converter to drive the wireless power transfer coil so as to transfer power to the wireless power receiver in accordance with a negotiated power transfer. Simultaneously during power transfer, the control and communications circuitry can send a polling signal to detect a foreign object including a wireless transponder and reduce or stop wireless power transfer upon receiving a response to the polling signal from a foreign object including a wireless transponder.