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：US11258307B2

公开(公告)日：2022-02-22

申请号：US16739683

申请日：2020-01-10

Applicant: Apple Inc.

Inventor： Wynand L. Malan ,  Zachary S. Harris

IPC: H02J50/60 ,  H02J7/00 ,  G08B7/06 ,  H02J50/80 ,  H02J50/10

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 a charging surface. The wireless power receiving device may be a portable electronic device receiving transmitted wireless power signals from the wireless power transmitting device while resting on the charging surface. During digital ping operations, low-power wireless power signals may be transmitted from the wireless power transmitting device. Information gathered during the digital ping such as wireless power transmission efficiency information, coupling coefficient information, Q-factor information, and coil inductance information may be used in determining whether a foreign object is present. Control circuitry in the transmitting device can cause the receiving device to present an alert for a user indicating that wireless power transfer operations are commencing in response to determining that no foreign object is present.

公开(公告)号：US20210050746A1

公开(公告)日：2021-02-18

申请号：US16739683

申请日：2020-01-10

Applicant: Apple Inc.

Inventor： Wynand L. Malan ,  Zachary S. Harris

IPC: H02J50/60 ,  H02J7/00 ,  H02J50/10 ,  H02J50/80 ,  G08B7/06

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 a charging surface. The wireless power receiving device may be a portable electronic device receiving transmitted wireless power signals from the wireless power transmitting device while resting on the charging surface. During digital ping operations, low-power wireless power signals may be transmitted from the wireless power transmitting device. Information gathered during the digital ping such as wireless power transmission efficiency information, coupling coefficient information, Q-factor information, and coil inductance information may be used in determining whether a foreign object is present. Control circuitry in the transmitting device can cause the receiving device to present an alert for a user indicating that wireless power transfer operations are commencing in response to determining that no foreign object is present.