公开(公告)号：US20250088038A1

公开(公告)日：2025-03-13

申请号：US18612886

申请日：2024-03-21

Applicant: Apple Inc.

Inventor： Giuseppe Pinto ,  Ruiyang Lin

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/80

Abstract: A wireless power transmitter can include wireless power transmitting circuitry having a wireless power transmitting coil that transmits wireless power signals and control circuitry coupled to the wireless power transmitting circuitry that: measures a present value of a first function and a second function of quality factor and resonant frequency of the wireless power transmitting coil; determines a change between the measured present values of the first and second functions of quality factor and resonant frequency of the wireless power transmitting coil and corresponding baseline values; determines whether a foreign object is present responsive to the change between the measured present values of the first and second functions of quality factor and resonant frequency and the corresponding baseline values in a magnetic state space exceeding a threshold.

公开(公告)号：US20250088040A1

公开(公告)日：2025-03-13

申请号：US18612904

申请日：2024-03-21

Applicant: Apple Inc.

Inventor： Giuseppe Pinto ,  Srinivasa V Thirumalai Ananthan Pillai ,  Ruiyang Lin

IPC: H02J50/60 ,  G01V3/10 ,  H02J50/12

Abstract: A wireless power transmitter (WPT) can include WPT circuitry having a wireless WPT coil that transmits wireless power signals; and control circuitry coupled to the WPT circuitry that: measures a present value of a first function of quality factor and resonant frequency of the wireless power transmitting coil and a present value of a second function of quality factor and resonant frequency of the WPT coil while the WPT is coupled to a wireless power receiver; determines a change between the measured present values and corresponding baseline values of the first and second functions of quality factor and resonant frequency of the WPT coil; determines a z-axis separation responsive to the change between the measured present values and corresponding baseline values of the first and second functions of quality factor and resonant frequency exceeding a threshold in a magnetic state space.

公开(公告)号：US20250088039A1

公开(公告)日：2025-03-13

申请号：US18612892

申请日：2024-03-21

Applicant: Apple Inc.

Inventor： Hanwei Wang ,  Giuseppe Pinto ,  Ruiyang Lin ,  Tao Li ,  Srinivasa V Thirumalai Ananthan Pillai ,  Jukka-pekka J Sjoeroos

IPC: H02J50/60 ,  H02J50/12 ,  H02J50/80

Abstract: A wireless power transmitter (WPT) can include WPT circuitry having a wireless WPT coil that transmits wireless power signals; and control circuitry coupled to the WPT circuitry that: measures a present value of a first function of quality factor and resonant frequency of the wireless power transmitting coil and a present value of a second function of quality factor and resonant frequency of the WPT coil while the WPT is coupled to a wireless power receiver; determines a change between the measured present values and corresponding baseline values of the first and second functions of quality factor and resonant frequency of the WPT coil; determines whether a foreign object is present responsive to the change between the measured present values and corresponding baseline values of the first and second functions of quality factor and resonant frequency exceeding a threshold in a magnetic state space.