The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2005
Filed:
Oct. 04, 2004
Eui Sung Kim, Kyungki-do, KR;
Seung Hee Ryu, Kyungki-do, KR;
Byeong Wook Park, Inchun-si, KR;
Dong Myung Shin, Kyungki-do, KR;
Eui Sung Kim, Kyungki-do, KR;
Seung Hee Ryu, Kyungki-do, KR;
Byeong Wook Park, Inchun-si, KR;
Dong Myung Shin, Kyungki-do, KR;
LG Electronics Inc., Seoul, KR;
Abstract
An induction heating cooker capable of accurately discriminating whether the material of a cooking container placed in the induction heating cooker is magnetic or non-magnetic, using a phase change in a resonant capacitor voltage of an inverter circuit and a switching pulse signal of the inverter circuit, irrespective of the load of the cooking container, and a method for operating the induction heating cooker. The induction heating cooker includes a power supply for rectifying an AC voltage, filtering the rectified voltage, and supplying the filtered voltage as an input voltage of the induction heating cooker, an inverter circuit for heating a cooking container placed in the induction heating cooker, using the voltage supplied from the power supply, and a container material discriminating unit for discriminating whether a material of the cooking container is magnetic or non-magnetic, based on a resonant capacitor voltage of the inverter circuit and a switching pulse signal of the inverter circuit, upon an initial operation of the induction heating cooker, whereby the cooking container is selectively heated in accordance with the result of the discrimination.