公开(公告)号：US10778036B2

公开(公告)日：2020-09-15

申请号：US15432139

申请日：2017-02-14

Applicant: WITS Co., Ltd.

Inventor： In Wha Jeong

IPC: H02J50/12 ,  G05F3/00 ,  H02J7/02

Abstract: A wireless power transmitter includes: a current adjuster configured to convert an input power into a transmission current, which is periodically varied according to a transmission frequency; and a power transmitter configured to receive the transmission current and wirelessly transmit power according to the transmission frequency.

公开(公告)号：US11025094B2

公开(公告)日：2021-06-01

申请号：US15092093

申请日：2016-04-06

Applicant: WITS Co., Ltd.

Inventor： In Wha Jeong ,  Jae Suk Sung ,  Hugh Kim

IPC: H02J50/12 ,  H02J7/00 ,  H02J7/02

Abstract: A wireless power receiving device includes a first resonance circuit configured to have a first resonance frequency; a second resonance circuit configured to have a second resonance frequency lower than the first resonance frequency; and a rectifying circuit connected to the first resonance circuit and the second resonance circuit without a switch and configured to rectify power received through the first resonance circuit and the second resonance circuit.

公开(公告)号：US10516446B2

公开(公告)日：2019-12-24

申请号：US15686367

申请日：2017-08-25

Applicant: WITS Co., Ltd.

Inventor： In Wha Jeong ,  Young Woon Choi ,  Se Joo Kim

IPC: H04B5/00 ,  H02J7/02 ,  H02J50/80 ,  H02J50/10 ,  H02J50/90 ,  H02J50/40

Abstract: A wireless power transmitter includes a switch circuit including switches connected to a transmission resonator; a current detector configured to detect a transient current induced in the transmission resonator; and a controller configured to control the switch circuit and adjust an output of the wireless power transmitter based on an amplitude of the transient current.

公开(公告)号：US10410787B2

公开(公告)日：2019-09-10

申请号：US15800957

申请日：2017-11-01

Applicant: WITS CO., Ltd.

Inventor： In Wha Jeong ,  Ki Hong Kim ,  Young Woon Choi ,  Young Seung Roh

IPC: H01F27/42 ,  H02J50/12 ,  H02J7/02 ,  H02M7/537 ,  H01F27/28 ,  H01F3/10 ,  H01F5/00 ,  H01F38/14 ,  H02M7/48

Abstract: A coil module includes a magnetic substance plate, a first coil, and a second coil. The magnetic substance plate includes a first area having a first magnetic permeability and a second area having a second magnetic permeability. The first coil is disposed on a surface of the magnetic substance plate. The second coil is disposed on the surface of the magnetic substance plate and partially overlapping the first coil. A portion of the first coil, not overlapping the second coil, is disposed on a surface of the first area, and a portion of the second coil, not overlapping the first coil, is disposed on a surface of the second area.