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公开(公告)号：US20230141390A1
公开(公告)日：2023-05-11
申请号：US17915065
申请日：2021-03-26
Applicant: LG ELECTRONICS INC.
Inventor： Gwangrok KIM , Ho Yong JANG , Jung Youn LEE , Seongkyu SONG
Abstract: The present disclosure relates to an induction heating device and a control method thereof. In one embodiment, at a time of a simultaneous operation of a first working coil operating at a first driving frequency and a second working coil operating at a second driving frequency, control for removing interference noise is performed based on a difference between the first driving frequency and the second driving frequency. An induction heating device of one embodiment may adjust the duty ratio of a switching signal provided to a first inverter circuit after adjusting the first driving frequency to adjust the actual output value of the first working coil to a value the same as the required output value of the first working coil.
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公开(公告)号：US20220256660A1
公开(公告)日：2022-08-11
申请号：US17668032
申请日：2022-02-09
Applicant: LG ELECTRONICS INC.
Inventor： Jung Youn LEE , Gwangrok KIM
Abstract: An induction heating apparatus may include a first working coil provided in a position corresponding to a first heating region, a second working coil provided in a position corresponding to a second heating region, an inverter circuit configured to supply current for driving at least one of the first working coil or the second working coil and comprising a plurality of switching elements, and a drive circuit configured to supply a switching signal to each of the switching elements. A controller configured to determine a driving mode of the working coil when a heating start command for at least one of the first working coil or the second working coil is input, and to supply a control signal for outputting of the switching signal to the drive circuit based on the determined driving mode.
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公开(公告)号：US20220256658A1
公开(公告)日：2022-08-11
申请号：US17668001
申请日：2022-02-09
Applicant: LG ELECTRONICS INC.
Inventor： Jung Youn LEE , Gwangrok KIM
IPC: H05B6/06 , H02M1/08 , H02M7/5387 , H05B6/12
Abstract: An induction heating apparatus may include a first working coil provided in a position corresponding to a first heating region, a second working coil provided in a position corresponding to a second heating region, an inverter circuit configured to supply current for driving at least one of the first working coil or the second working coil, and a drive circuit configured to supply a switching signal to each of the switching elements. A controller may be configured to determine a driving mode of the working coil when a heating start command for at least one of the first working coil or the second working coil is input, and the controller may provide a control signal for outputting the switching signals based on the determined driving mode.
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公开(公告)号：US20210315062A1
公开(公告)日：2021-10-07
申请号：US17218576
申请日：2021-03-31
Applicant: LG ELECTRONICS INC.
Inventor： Gwangrok KIM , Ho Yong JANG , Jung Youn LEE , Seongkyu SONG
Abstract: The present disclosure relates to an induction heating apparatus and a method of controlling the same. A controller of the induction heating apparatus according to the present disclosure may set an operation mode of an inverter circuit to a half bridge mode when a required power value of a working coil is set to a value less than a reference power value such that a driving frequency of the working coil decreases while an actual power value of the working coil is kept the same as the required power value. Additionally, the controller of the induction heating apparatus may adjust a duty ratio of a switching signal input to a switching element included in the inverter circuit, thereby adjusting the actual power value of the working coil.
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