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:
May. 31, 2016
Filed:
Aug. 30, 2013
Konica Minolta, Inc., Chiyoda-ku, JP;
Seiichi Kirikubo, Toyohashi, JP;
Masaaki Goto, Toyohashi, JP;
Yutaka Yamamoto, Shinshiro, JP;
Takahiro Tsujimoto, Toyokawa, JP;
Hiroyuki Watanabe, Hachioji, JP;
Hidenori Mine, Toyohashi, JP;
Masato Ishii, Toyokawa, JP;
KONICA MINOLTA, INC., Chiyoda-Ku, Tokyo, JP;
Abstract
An electromagnetic induction heating apparatus comprises: a resonance circuit that includes a inductor and a capacitor; a direct-current electric power supply; and a switching element performing ON and OFF switching of electric power supplied to the resonance circuit by the direct-current electric power supply; performs intermittent control of the electric power supply by controlling the ON and OFF switching at regular intervals, and by performing control to stop the electric power supply when not controlling the ON and OFF switching, wherein during the intermittent control, the switching control unit performs gradual control such that, upon beginning the control of the ON and OFF switching, the electric power supply gradually increases to reach a target value, and upon stopping the control of the ON and OFF switching, the electric power supply gradually decreases from the target value until stopping, such that the gradual decrease involves fewer steps than the gradual increase.