公开(公告)号：US20230217555A1

公开(公告)日：2023-07-06

申请号：US18092844

申请日：2023-01-03

Applicant: LG ELECTRONICS INC.

Inventor： Sihoon JEONG ,  John KANG ,  Kyelyong KANG

IPC: H05B6/08 ,  H02M7/48 ,  H02M1/00

CPC classification number: H05B6/08 ,  H02M7/4815 ,  H02M1/0009

Abstract: An induction heating device of one embodiment includes a working coil, an inverter including a first switch and a second switch and supplying a resonance current to the working coil, a phase sensing circuit outputting a pulse signal that indicates a phase difference between the resonance current and a switching voltage of the second switch, and a controller calculating a final phase difference between the resonance current and the switching voltage of the second switch, based on the pulse signal, and adjusting an output power value of the working coil, based on the final phase difference.

公开(公告)号：US20220322499A1

公开(公告)日：2022-10-06

申请号：US17667904

申请日：2022-02-09

Applicant: LG ELECTRONICS INC.

Inventor： Bada YOON ,  John KANG ,  Wongyu PARK

IPC: H05B6/06 ,  H05B6/12 ,  H05B6/04

Abstract: An induction heating apparatus according to one embodiment comprises a working coil disposed in a position corresponding to a heating zone, an inverter circuit that comprises a plurality of switching elements and supplies current to the working coil, a driving circuit that supplies a switching signal to each of the switching elements included in the inverter circuit, a current sensor that measures a resonance current value, magnitude of resonance current flowing in the working coil, and a controller that supplies a control signal for adjusting a duty ratio and a frequency of the switching signal to the driving circuit, to drive the working coil.

公开(公告)号：US20190141793A1

公开(公告)日：2019-05-09

申请号：US16030984

申请日：2018-07-10

Applicant: LG Electronics Inc.

Inventor： Bada YOON ,  John KANG ,  Wongyu PARK

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

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：US20230103228A1

公开(公告)日：2023-03-30

申请号：US17908962

申请日：2021-02-23

Applicant: LG ELECTRONICS INC.

Inventor： Wongyu PARK ,  Bada YOON ,  John KANG

IPC: H05B6/06 ,  H05B6/12

Abstract: The present disclosure relates to an induction heating device and a control method thereof. An induction heating device of one embodiment may comprise: an inverter circuit supplying electric currents to a working coil; a driving circuit supplying a switching signal to the inverter circuit, based on a control signal; an output detector detecting an output of the working coil; and a controller setting on-time of the working coil based on a current output of the working coil and controlling the output of the working coil, in a low-level operation in which a target output is equal to or less than a predetermined value.

公开(公告)号：US20210329747A1

公开(公告)日：2021-10-21

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 ,  H05B6/12 ,  H05B6/04 ,  H02M3/158

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.