公开(公告)号：US12120800B2

公开(公告)日：2024-10-15

申请号：US17271112

申请日：2019-08-30

Applicant: LG ELECTRONICS INC.

Inventor： Wongyu Park ,  Gwang Rok Kim ,  Bada Yoon ,  John Kang

IPC: H05B6/06 ,  H02M3/158 ,  H05B6/04 ,  H05B6/12

CPC classification number: H05B6/065 ,  H02M3/158 ,  H05B6/04 ,  H05B6/1272

Abstract: A method for controlling an induction heating device according to an embodiment of the present disclosure includes driving a first working coil at a first target frequency, receiving a driving command for a second working coil, stopping the driving of the first working coil and driving the second working coil at a preset first adjustment frequency, and determining a second target frequency of the second working coil corresponding to the driving command for the second working coil.

公开(公告)号：US10904953B2

公开(公告)日：2021-01-26

申请号：US16030984

申请日：2018-07-10

Applicant: LG Electronics Inc.

Inventor： Bada Yoon ,  John Kang ,  Wongyu Park

IPC: H05B6/12 ,  H05B6/06 ,  H02M7/539 ,  H05B1/02 ,  H05B6/08

Abstract: An induction heating device includes a working coil, an inverter, an inverter driving unit configured to apply a switching signal to the inverter to enable the inverter to perform a switching operation, a control unit configured to generate and apply a control signal to the inverter driving unit to cause the inverter driving unit to generate the switching signal based on the control signal, and a determination unit configured to determine a type of an object disposed on the induction heating device based on (i) a first resonant current value measured from the working coil in response to operation of the inverter by the switching signal having a first operation frequency and (ii) a second resonant current value measured from the working coil in response to operation of the inverter by the switching signal having a second operation frequency.

公开(公告)号：US20230217554A1

公开(公告)日：2023-07-06

申请号：US18092618

申请日：2023-01-03

Applicant: LG Electronics Inc.

Inventor： Sihoon JEONG ,  John Kang ,  Hoseop Ahn ,  Kyelyong Kang

IPC: H05B6/06 ,  H05B6/12

CPC classification number: H05B6/062 ,  H05B6/1209

Abstract: An induction heating device according to an embodiment includes a rectifying circuit configured to rectify an AC voltage supplied from a power supply, a smoothing circuit configured to smooth a voltage output from the rectifying circuit, an inverter comprising a plurality of switches and configured to supply current to a working coil, a shunt resistor coupled between the smoothing circuit and the inverter, a drive circuit configured to supply switching signals to the plurality of switches provided in the inverter, respectively, and a controller configured to determine a driving frequency of the inverter and drive the working coil by supplying a control signal based on the driving frequency to the driving circuit.

公开(公告)号：US20230217556A1

公开(公告)日：2023-07-06

申请号：US18093129

申请日：2023-01-04

Applicant: LG ELECTRONICS INC.

Inventor： Kyelyong KANG ,  John Kang ,  Jinwook Han

IPC: H05B6/08 ,  H05B6/06 ,  H05B6/42

CPC classification number: H05B6/08 ,  H05B6/062 ,  H05B6/42 ,  H05B2213/05

Abstract: An induction heating device according to an embodiment includes an inverter configured to supply an AC current to a working coil and includes a plurality of switches; a drive circuit configured to supply a switching signal for a switching operation of the plurality of switches to the inverter; and a controller configured to control driving of the working coil by supplying a control signal corresponding to a required power value of the working coil to the drive circuit. The controller may drive the working coil based on the required power value, receive a resonance current value of the working coil when the working coil is driven, calculate a container efficiency index based on an output power value of the working coil, the required power value, the resonance current value and a preset limit current value, and control the driving of the working coil based on the container efficiency index.