公开(公告)号：US12213234B2

公开(公告)日：2025-01-28

申请号：US17313500

申请日：2021-05-06

Applicant: LG ELECTRONICS INC.

Inventor： Sihoon Jeong ,  Kyelyong Kang ,  Hanna Kim

IPC: H05B6/06 ,  H02M7/5387 ,  H05B6/08 ,  H05B6/12

Abstract: An induction heating apparatus may include first/second working coils, first/second inverter circuits, and a controller. When a user changes a required power value of a first working coil or a second working coil to a third required power value, a controller determines a third driving frequency corresponding to the third required power value. The controller calculates a difference value between a driving frequency of the working coil, the required power value of which is not changed, and the third driving frequency, and compares the calculated difference value with a first reference range. When the calculated difference value is included in the first reference range, the controller changes an operation mode of a first inverter circuit from a full bridge mode to a frequency doubler mode, and changes an output power value of the working coil, the required power value of which is changed to the third required power value.

公开(公告)号：US12028954B2

公开(公告)日：2024-07-02

申请号：US17313354

申请日：2021-05-06

Applicant: LG ELECTRONICS INC. ,  UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)

Inventor： Sihoon Jeong ,  Kyelyong Kang ,  Jinwook Han ,  Hwa Pyeong Park ,  Jee Hoon Jung

IPC: H05B6/06 ,  H02M7/5387 ,  H05B6/12 ,  H02M5/458

CPC classification number: H05B6/062 ,  H02M7/53871 ,  H05B6/12 ,  H02M5/4585 ,  H05B2213/05

Abstract: An induction heating apparatus according to one embodiment may confirm a feature of a container and determine an operation mode based on the feature of the container before performing an operation of heating the container. In one embodiment, the operation mode of the induction heating apparatus may be determined as any one of a frequency doubler mode, a half bridge mode, and a full bridge mode. In one embodiment, a power control mode of the induction heating apparatus may be determined based on an operation mode of the induction heating apparatus. In one embodiment, the power control mode of the induction heating apparatus may be determined as any one of an asymmetric pulse width modulation (APWM) mode and a phase shift mode.

公开(公告)号：US11882640B2

公开(公告)日：2024-01-23

申请号：US17313427

申请日：2021-05-06

Applicant: LG ELECTRONICS INC.

Inventor： Sihoon Jeong ,  Kyelyong Kang ,  Hanna Kim

IPC: H05B6/06 ,  H05B6/04 ,  H05B1/02 ,  H02M7/537

CPC classification number: H05B6/062 ,  H02M7/537 ,  H05B1/02 ,  H05B6/04

Abstract: An induction heating apparatus is configured to determine a third driving frequency corresponding to a third required power value when the required power value of the first working coil or the second working coil is changed to the third required power value, to calculate a difference value between the driving frequency of the working coil (the required power value of which is not changed) and the third driving frequency, to change an operation mode or a power control mode of the first inverter circuit or the second inverter circuit when the difference value is included in a predetermined first reference range, and to change an output power value of the working coil (the required power value of which is changed) to the third required power value.

公开(公告)号：US20220386423A1

公开(公告)日：2022-12-01

申请号：US17752009

申请日：2022-05-24

Applicant: LG Electronics Inc.

Inventor： Sihoon Jeong ,  Ho Yong Jang ,  Bada Yoon ,  Gwangrok Kim

IPC: H05B6/06 ,  H05B6/04 ,  H05B6/44 ,  G01R19/25

Abstract: An induction heating device according to and embodiment may include a working coil; an inverter circuit comprising a plurality of switching elements and configured to supply currents to the working coil; a rectifier circuit configured to rectify the voltage supplied from an external power source; a smoothing circuit configured smooth the voltage output from the rectifier circuit; a drive circuit configured to supply a switching signal to each of the switching circuits; a controller configured to supply a control signal for outputting the switching signal to the drive circuit; a shunt resistor connected between the smoothing circuit and the inverter circuit; an input current sensing circuit configured to sense an input current value of the inverter circuit based on a current flowing through the shunt resistor; and a resonance current sensing circuit a resonance current value of the working coil based on the current flowing through the shunt resistor

公开(公告)号：US20220264707A1

公开(公告)日：2022-08-18

申请号：US17674062

申请日：2022-02-17

Applicant: LG ELECTRONICS INC. ,  UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY)

Inventor： Mina KIM ,  Kyelyong Kang ,  Jinwook Han ,  Sihoon Jeong ,  Jee Hoon Jung

IPC: H05B6/06 ,  H05B6/12

Abstract: An induction heating apparatus may receive a power level input for a heating area, determine a required power value corresponding to the power level, determine a heating frequency corresponding to the required power value, and set a driving frequency of the working coil to an initial frequency determined based on the heating frequency and then drive the working coil. The driving frequency may be changed from a current driving frequency to a target frequency based on a predetermined frequency change cycle.