公开(公告)号：EP3637954A1

公开(公告)日：2020-04-15

申请号：EP19167355.7

申请日：2019-04-04

Applicant: LG Electronics Inc.

Inventor： OK, Seungbok ,  OH, Dooyong ,  LEE, Jae-Woo

IPC: H05B6/06

Abstract: An induction heating device includes first and second working coils connected electrically in parallel, an inverter unit configured to switch at least one of the first working coil or the second working coil, an inverter driving unit connected to the inverter unit; a first semiconductor switch connected to the first working coil, a first semiconductor switch driving unit connected to the first semiconductor switch, an over-current protection unit connected to the first semiconductor switch, configured to generate information based on a current that flows in the first semiconductor switch, and configured to, based on the information, determine whether to turn off the inverter driving unit, and a control unit that is configured to receive the information, and determine, based on the information, whether to block a pulse signal to the inverter driving unit and whether to turn off the first semiconductor switch driving unit.

公开(公告)号：EP3731597A1

公开(公告)日：2020-10-28

申请号：EP18893086.1

申请日：2018-11-28

Applicant: LG Electronics Inc.

Inventor： OH, Dooyong ,  PARK, Byeong Wook ,  OK, Seungbok ,  LEE, Jae-Woo

IPC: H05B6/06 ,  H05B6/04

Abstract: An induction heating device includes a working coil and a resonance capacitor, an inverter that performs a switching operation to supply a resonance current to the working coil, a plurality of snubber capacitors electrically connected to the inverter, a direct current (DC) link capacitor electrically connected to the inverter, and a relay configured to electrically connect one of the plurality of snubber capacitors to the DC link capacitor or the resonance capacitor.

公开(公告)号：EP3462816A1

公开(公告)日：2019-04-03

申请号：EP18196543.5

申请日：2018-09-25

Applicant: LG Electronics Inc.

Inventor： MOON, Hyunwook ,  KIM, Eui Sung ,  PARK, Byeong Wook ,  LEE, Jae-Woo

IPC: H05B6/12

Abstract: This application relates to a support structure for an object to be heated driven associated with a working coil provided in an induction heating device. In addition, in accordance with an exemplary embodiment of this application, the support structure for the object to be heated includes a housing that is concavely formed downward and the object to be heated is arranged in the upper surface, a repeating coil that is provided inside the housing and driven through a magnetic induction or a magnetic resonance with the working coil, and a compensation capacitor that is provided inside the housing and connected to the repeating coil in order to control an output of the repeating coil.

公开(公告)号：EP3726929A1

公开(公告)日：2020-10-21

申请号：EP20150185.5

申请日：2020-01-03

Applicant: LG Electronics Inc.

Inventor： LEE, Jae-Woo ,  OK, Seungbok ,  KIM, Seongjun

IPC: H05B6/06 ,  H05B6/12

Abstract: An induction heating device includes a case, working coils, a cover plate, an input interface, a first control module configured to detect one or more of the working coils at a position of an object seated on the cover plate, a second control module configured to receive information on the position of the object and control the input interface to display an image of a heating zone, and light emitting elements disposed below a periphery of each of the plurality of working coils. The second control module is configured to analyze an arrangement form of the one or more of the working coils based on the information on the position of the object, and control driving of at least one of the light emitting elements based on a result of analyzing the arrangement form.

公开(公告)号：EP3740031A1

公开(公告)日：2020-11-18

申请号：EP18898822.4

申请日：2018-11-28

Applicant: LG Electronics Inc.

Inventor： OK, Seungbok ,  PARK, Byeong Wook ,  LEE, Jae-Woo

IPC: H05B6/06 ,  H05B6/12

Abstract: An induction heating device includes a working coil group including a first working coil and a second working coil that are electrically connected in parallel to each other, an inverter configured to perform a switching operation to supply resonance current to at least one of the first or second working coil; a first semiconductor switch electrically connected to the first working coil to turn on and turn off the first working coil; a second semiconductor switch electrically connected to the second working coil to turn on and turn off the second working coil; and a controller configured to control operation of the inverter and the first and second semiconductor switches, respectively. The controller turns off the inverter before turning off at least one of the first semiconductor switch or the second semiconductor switch.

公开(公告)号：EP3737209A1

公开(公告)日：2020-11-11

申请号：EP18897908.2

申请日：2018-11-28

Applicant: LG Electronics Inc.

Inventor： LEE, Jae-Woo ,  PARK, Byeong Wook ,  OH, Dooyong ,  OK, Seungbok

IPC: H05B6/06 ,  H05B6/12 ,  H02M1/34

Abstract: An induction heating apparatus includes a working coil; an inverter configured to perform switching operation to thereby apply a resonance current to the working coil; and a controller configured to provide a control signal with a fixed frequency to the inverter to thereby control the switching operation. The controller changes a pulse width of the control signal based on a predetermined cycle that is set based on a temperature of the inverter.