公开(公告)号：US20200244108A1

公开(公告)日：2020-07-30

申请号：US16627200

申请日：2018-06-28

Applicant: LG Electronics Inc.

Inventor： Sungkyu KIM ,  Jeongkyo SEO ,  Jinmoo PARK ,  Seonghun LEE ,  Bongsik KWAK ,  Jaesung LEE ,  Jihyun LEE ,  Gyunghwan YOOK ,  Joonho PARK ,  Youngchan CHO

IPC: H02J50/40 ,  H02J50/12 ,  H02J50/80 ,  H01F38/14 ,  H02J7/02 ,  H02J50/60 ,  H02J50/90 ,  H04B5/00

Abstract: The present invention relates to a multi-coil based wireless power transmission device and method. Disclosed in the present specification is a wireless power transmission device comprising: a primary coil array forming a magnetic coupling with a secondary coil, which is provided in a wireless power reception device, so as to transmit wireless power to the wireless power reception device; a plurality of inverters connected to a plurality of primary coils one-to-one so as to selectively drive each of the plurality of primary coils; a communication and control unit, which controls the plurality of inverters and communication with the wireless power reception device such that at least one primary coil is driven on the basis of the degree of magnetic coupling formed by each primary coil and the secondary coil, thereby determining output, which can be provided by the primary coil array, within a value obtained by summing all the maximum outputs individually set to the respective primary coils. In an intermediate power level wireless power transmission system, a non-chargeable state due to coil misalignment can be compensated for on the basis of multi-coils, an extended design of a charging area at low cost is simple, and the degree of freedom of the position or the alignment of a reception device can be increased.

公开(公告)号：US20170294798A1

公开(公告)日：2017-10-12

申请号：US15484728

申请日：2017-04-11

Applicant: LG ELECTRONICS INC.

Inventor： Gyunghwan YUK ,  Jaesung LEE ,  Jaesoon KWON ,  Jinsup PARK ,  Jeongkyo SEO ,  Byungsang JUNG ,  Youngchan CHO

IPC: H02J7/02 ,  H02J50/90 ,  H04B5/00 ,  H02J50/80 ,  H01F38/14 ,  H02J50/12 ,  H02J50/60

CPC classification number: H02J7/025 ,  H01F38/14 ,  H01F2038/143 ,  H02J50/12 ,  H02J50/40 ,  H02J50/80 ,  H02J50/90 ,  H04B5/0037

Abstract: The present relates to a wireless power transmitter performing communication with a wireless power receiver, and a wireless power transfer method thereof. The wireless power transmitter includes a power conversion unit configured to transmit a wireless power signal transferred in a form of an energy field, such as an electric field, a magnetic field or an electromagnetic field, and a power transmission control unit configured to transfer power to the wireless power receiver using the wireless power signal, wherein the power transmission control unit is configured to control the power conversion unit to transmit a near-field communication (NFC) detection signal, other than the wireless power signal, when a preset condition is satisfied, and wherein the power transmission control unit controls the wireless conversion unit in a different manner according to whether or not a response signal to the NFC detection signal is detected.