公开(公告)号：US20250007313A1

公开(公告)日：2025-01-02

申请号：US18759430

申请日：2024-06-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Mingi SONG ,  Juhyang LEE ,  Geonhong MIN ,  Kyungmin PARK ,  Changhak O ,  Inkook YOON ,  Hwarang CHA

IPC: H02J7/00 ,  H02J7/06 ,  H02J50/00

Abstract: A first electronic device configured to receive power wirelessly according to an embodiment may include: a power receiving circuit including a plurality of capacitors, at least one coil, and at least one switch, a rectifier including a plurality of transistors, and a control circuit. The control circuit according to an embodiment may be configured to: set the plurality of capacitors and the at least one coil to a first connection state through the at least one switch, based on a frequency specified by a second electronic device transmitting power wirelessly; receive alternating current (AC) power wirelessly from the second electronic device through the power receiving circuit set to the first connection state; control the plurality of transistors included in the rectifier to rectify the power received from the second electronic device; identify a first voltage of power rectified to direct current (DC) through the rectifier; set the plurality of capacitors and the at least one coil to a second connection state through the at least one switch to increase an impedance of the plurality of capacitors and/or change a resonant frequency of the power, based on identifying that the first voltage is greater than a first threshold; and control the plurality of transistors included in the rectifier to freewheel the power received from the second electronic device.

公开(公告)号：US20230420993A1

公开(公告)日：2023-12-28

申请号：US18343511

申请日：2023-06-28

Applicant: Samsung Electronics Co., Ltd. ,  Seoul National University R&DB Foundation

Inventor： Kyunghwan LEE ,  Jungik HA ,  Geonhong MIN ,  Junhyeong LEE

IPC: H02J50/12 ,  H02J7/00

CPC classification number: H02J50/12 ,  H02J2207/20 ,  H02J7/0047 ,  H02J7/00712

Abstract: According to an embodiment, an electronic device for wirelessly receiving power may include: a power reception circuit including a coil, an impedance compensation circuit electrically connected to the power reception circuit, a rectifier circuit electrically connected to the impedance compensation circuit, a battery electrically connected to the rectifier circuit, and a control circuit electrically and/or operatively connected to the impedance compensation circuit, the rectifier circuit, and the battery. According to an embodiment, the control circuit may be configured to: rectify, by controlling the rectifier circuit, power received wirelessly from an external electronic device through the power reception circuit and the impedance compensation circuit into direct current (DC) power. According to an embodiment, the control circuit may be configured to identify at least one of a voltage or a current of the rectified DC power. According to an embodiment, the control circuit may be configured to determine a duty cycle of a control signal to control the impedance compensation circuit, based on the at least one of the voltage or the current. According to an embodiment, the control circuit may be configured to adjust a first voltage output by the impedance compensation circuit by controlling the impedance compensation circuit based on the duty cycle. According to an embodiment, impedance of the power reception circuit may be compensated based on the adjusted first voltage of the impedance compensation circuit.