公开(公告)号：US11870275B2

公开(公告)日：2024-01-09

申请号：US17134084

申请日：2020-12-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Yanding Liu ,  Furong Xiao

IPC: H02J50/60 ,  H02J50/12 ,  B60L53/124

CPC classification number: H02J50/60 ,  H02J50/12 ,  B60L53/124 ,  H02J2310/48

Abstract: An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal and output the first signal to the excitation module and the determining module. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal. The determining module is configured to determine whether there is a metal foreign matter in an area of the target coil.

公开(公告)号：US12176969B2

公开(公告)日：2024-12-24

申请号：US17989517

申请日：2022-11-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yanding Liu ,  Weiliang Shu ,  Furong Xiao ,  Qitang Liu

IPC: H04B5/79 ,  G06F1/16 ,  H02J50/05 ,  H02J50/12 ,  H02J50/80 ,  H04B5/22 ,  H04B5/24

Abstract: A terminal device and a method for controlling the terminal device are provided. The terminal device includes a display screen, a housing, a middle frame and a transmitting circuit. The transmitting circuit is disposed on a side of the middle frame and faces the housing. The transmitting circuit includes a matching network and a transmitting coil connected to the matching network. The matching network is configured to perform impedance matching on a received alternating current power signal and send the received alternating current power signal to the transmitting coil. The matching network includes a parallel resonant capacitor connected in parallel to the transmitting coil. The transmitting circuit further includes a resistance switching circuit connected in series to the parallel resonant capacitor.

公开(公告)号：US20210119494A1

公开(公告)日：2021-04-22

申请号：US17134084

申请日：2020-12-24

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yunhe Mao ,  Zhixian Wu ,  Yanding Liu ,  Furong Xiao

IPC: H02J50/60 ,  H02J50/12

Abstract: An apparatus and a method for detecting a metal foreign matter in a wireless charging system, and a device are provided. The apparatus includes a phase-lock control module, an excitation module, a resonance module, a signal collection module, and a determining module. The phase-lock control module is configured to: adjust a frequency of a first signal and output the first signal to the excitation module and the determining module. The excitation module is configured to: generate a second signal based on the first signal, and output the second signal to the resonance module. The resonance module is configured to output the third signal to the signal collection module under excitation of the second signal. The determining module is configured to determine whether there is a metal foreign matter in an area of the target coil.