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:
Sep. 13, 2016
Filed:
Mar. 23, 2012
Seiichi Kirikubo, Toyohashi, JP;
Atsushi Yamaguchi, Tahara, JP;
Yutaka Yamamoto, Shinshiro, JP;
Takahiro Tsujimoto, Toyokawa, JP;
Hiroyuki Watanabe, Toyokawa, JP;
Hidenori Mine, Toyohashi, JP;
Masato Ishii, Toyokawa, JP;
Seiichi Kirikubo, Toyohashi, JP;
Atsushi Yamaguchi, Tahara, JP;
Yutaka Yamamoto, Shinshiro, JP;
Takahiro Tsujimoto, Toyokawa, JP;
Hiroyuki Watanabe, Toyokawa, JP;
Hidenori Mine, Toyohashi, JP;
Masato Ishii, Toyokawa, JP;
KONICA MINOLTA BUSINESS TECHNOLOGIES, INC., Chiyoda-Ku, Tokyo, JP;
Abstract
An induction heating device includes: a resonant circuit provided with a coil heating a workpiece inductively and a capacitor, the coil and the capacitor being coupled in parallel with each other; a switching element coupled in series with the resonant circuit; a power supply which applies to the resonant circuit, a direct-current input voltage whose instantaneous value can be changed with the lapse of time; and a power controller which controls power to the workpiece by turning the switching element ON at a certain time and changing an ON period of the switching element, and the power controller is characterized by turning the switching element ON with a delay of an integral multiple of a resonant period of the resonant circuit if a value of power to the workpiece is equal to or lower than a first threshold which is predetermined.