公开(公告)号：US11349320B2

公开(公告)日：2022-05-31

申请号：US16742374

申请日：2020-01-14

Applicant: LG ELECTRONICS INC.

Inventor： Sungkyu Kim ,  Seonghun Lee ,  Bongsik Kwak ,  Jihyun Lee ,  Joonho Park

IPC: H02J7/00 ,  H02J50/80 ,  H02J50/12 ,  H02J50/40

Abstract: The present invention relates to a wireless power transmitting device. The wireless power transmitting device comprises a transmitter coil section with a plurality of partially overlapping transmitter coils; a fan for cooling heat generated by the transmitter coil section; and a controller for sending out a detection signal through the transmitter coil section, calculating the number of operating coils based on the strength of a response signal to the detection signal, and controlling the fan based on the calculated number of operating coils. Accordingly, heat generated by the transmitter coils can be reduced more efficiently.

公开(公告)号：US11296558B2

公开(公告)日：2022-04-05

申请号：US16687325

申请日：2019-11-18

Applicant: LG ELECTRONICS INC.

Inventor： Jihyun Lee ,  Seonghun Lee ,  Bongsik Kwak ,  Joonho Park ,  Sungkyu Kim

IPC: H02J50/60 ,  H02J50/80 ,  H02J50/12 ,  G01V3/10 ,  H01F38/14 ,  H02J7/02

Abstract: A wireless power transmission apparatus can include a resonant circuit including a plurality of coils and a plurality of capacitor elements respectively connected to the plurality of coils; a first sensor configured to sense a change in inductance of each of the plurality of coils; a second sensor configured to sense a change in a quality factor of each of the plurality of coils; and a controller configured to calculate feature values based on an inductance variation and a quality factor variation for detecting a foreign object, and determine the foreign object is present on a charging surface of the wireless power transmission apparatus based on whether a feature value combination selected from among the feature values falls within a reference region on a coordinate plane formed by an intersection of a first axis and a second axis, in which the first axis is based on inductance variation and the second axis is based on quality factor variation.

公开(公告)号：US11218028B2

公开(公告)日：2022-01-04

申请号：US16739749

申请日：2020-01-10

Applicant: LG ELECTRONICS INC.

Inventor： Hyengcheul Choi ,  Bongsik Kwak ,  Seong Hun Lee

IPC: H02J50/40 ,  H02J50/12 ,  H01F38/14 ,  H02J50/80

Abstract: The present disclosure relates to a wireless power receiving apparatus capable of receiving multi-level power transmitted by a wireless power transmitting apparatus. According to an embodiment of the present disclosure, the wireless power receiving apparatus includes a first receiving coil in which induced current is generated by electromagnetic induction, a second receiving coil connected in series with the first receiving coil by a switch, and a processor that is driven based on the induced current generated by the first receiving coil and controls the switch based on power information included in the induction current to selectively connect the first receiving coil and the second receiving coil.

公开(公告)号：US09843196B2

公开(公告)日：2017-12-12

申请号：US14301032

申请日：2014-06-10

Applicant: LG ELECTRONICS INC.

Inventor： Bongsik Kwak ,  Jeongkyo Seo ,  Seonghun Lee

IPC: H02J7/00 ,  H02J5/00 ,  H04B5/00 ,  H02J7/02

CPC classification number: H02J5/005 ,  H02J7/025 ,  H02J50/12 ,  H04B5/0037 ,  H04B5/0075 ,  H04B5/0087 ,  H04B5/0093

Abstract: The present disclosure relates to a wireless power transmitter, a wireless power receiver and a wireless charging system in a wireless power transfer field. A wireless power transmitter disclosed herein includes a first coil configured to transfer a wireless power signal to a wireless power receiver, a second coil having a wire wound to transfer power to the wireless power receiver in a wireless manner, and a controller configured to control operations of the first and second coils, wherein the first coil is provided with a wire wound along an edge of a shape of the second coil.