US 11,751,291 B2
Induction heating apparatus
Tomoyuki Kanagawa, Yokohama (JP); Masaki Ono, Yokohama (JP); Masashi Sasagawa, Yokohama (JP); Masayuki Otawara, Yokohama (JP); Nobuhara Nishikoori, Yokohama (JP); Taro Yoshida, Yokohama (JP); and Yutaka Yagi, Yokohama (JP)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Jan. 15, 2021, as Appl. No. 17/150,458.
Claims priority of application No. 2020-004143 (JP), filed on Jan. 15, 2020; and application No. 10-2020-0175150 (KR), filed on Dec. 15, 2020.
Prior Publication US 2021/0219390 A1, Jul. 15, 2021
Int. Cl. H05B 6/04 (2006.01); H05B 6/06 (2006.01)
CPC H05B 6/04 (2013.01) [H05B 6/062 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An induction heating apparatus comprising:
a heating coil;
an inverter;
a current sensor disposed in an LC parallel resonant circuit and being configured to measure a driving current supplied from the inverter to the heating coil; and
a controller configured to:
based on a user input, provide a first drive signal to the inverter to allow the driving current to follow a first target current corresponding to a first power set by the user input,
based on the driving current exceeding a predetermined reference current, reduce a driving duty of the first drive signal,
based on the driving current being less than or equal to the predetermined reference current after reducing the driving duty of the first drive signal, provide a second drive signal to the inverter to allow the driving current to follow a second target current corresponding to a second power less than the first power set by the user input, and
based on the driving current exceeding the predetermined reference current after reducing the driving duty of the first drive signal, stop an operation of the inverter.