公开(公告)号：US20240039337A1

公开(公告)日：2024-02-01

申请号：US18356339

申请日：2023-07-21

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Yuechao LI ,  Chao WANG

IPC: H02J50/12 ,  H02M3/158 ,  H02M7/538

CPC classification number: H02J50/12 ,  H02M3/1582 ,  H02M7/53803 ,  H02J2207/20

Abstract: Example wireless charging methods and apparatus are described. In one example, a wireless charging module includes a control circuit, a charging coil, a tunable capacitor module, and a converter circuit. The converter circuit includes at least one of a rectifier circuit or an inverter circuit. The tunable capacitor module is connected in series between the charging coil and the converter circuit. The tunable capacitor module includes a plurality of capacitors and at least one controllable switch. The control circuit controls the at least one controllable switch to be turned on or off, to control an equivalent capacitance value of the tunable capacitor module. The equivalent capacitance value of the tunable capacitor module includes one of a first capacitance value or a second capacitance value.

公开(公告)号：US20250055327A1

公开(公告)日：2025-02-13

申请号：US18924722

申请日：2024-10-23

Applicant: Huawei Digital Power Technologies Co., Ltd.

Inventor： Yuechao LI ,  Chao WANG ,  Baoshan WU ,  Changyuan LI

IPC: H02J50/90 ,  H01F7/02 ,  H01F27/28 ,  H02J50/10

Abstract: A wireless charging module, an electronic device, and a charger. The wireless charging module includes a charging coil and a magnetic attachment apparatus. A magnetic attachment apparatus includes a plurality of magnetic attachment units where each one includes a first and a second assembly, and the first and the second assembly are disposed on a same surface in a first direction. The first assembly includes a plurality of magnets those magnetic field directions of which are parallel and opposite to each other, so that lateral magnetic fields cancel each other out, to weaken a magnetic field radiated around or to an inside by the magnetic attachment apparatus. Therefore, a soft magnetic material can be omitted or reduced. An enhancement in magnetic field strength on a side of the magnetic attachment apparatus leads to better limit a location of contact between the electronic device and the charger.