US 11,943,858 B2
Induction heating apparatus and method of controlling the same
Gwangrok Kim, Seoul (KR); Ho Yong Jang, Seoul (KR); Jung Youn Lee, Seoul (KR); and Seongkyu Song, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Mar. 31, 2021, as Appl. No. 17/218,576.
Claims priority of application No. 10-2020-0041196 (KR), filed on Apr. 3, 2020.
Prior Publication US 2021/0315062 A1, Oct. 7, 2021
Int. Cl. H05B 6/06 (2006.01); H05B 6/04 (2006.01); H05B 6/36 (2006.01)
CPC H05B 6/06 (2013.01) [H05B 6/04 (2013.01); H05B 6/36 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An induction heating apparatus, comprising:
a working coil configured to heat an object;
an inverter circuit that includes a plurality of switching elements, and configured to supply current to the working coil, wherein each of the switching elements is associated with a different corresponding one of a plurality of switching signals; and
a controller configured to:
compare a set power value of the working coil with a predetermined reference power value,
change an operation mode of the inverter circuit to a half bridge mode when the set power value is determined to be less than the reference power value,
change a duty ratio of a first one of the switching signals to a predetermined reference duty ratio, and
change an actual power value of the working coil to the set power value of the working coil.