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.