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:
Jan. 26, 2016
Filed:
Dec. 03, 2010
Naoki Uchida, Tamano, JP;
Yoshihiro Okazaki, Tamano, JP;
Kazuhiro Ozaki, Tamano, JP;
MITSUI ENGINEERING & SHIPBUILDING CO., LTD., Tokyo, JP;
Abstract
The purpose of the present invention is to minimize switching losses of an inverter. An induction heating device includes: a plurality of induction heating coils () which are disposed adjacent with each other; a plurality of inverters (), each of which has a capacitor () serially connected to each of the induction heating coils (), and converts a DC voltage into a square wave voltage; and a control circuit () which controls so as to align the phase of coil currents flowing though the plurality of the induction heating coils (), wherein the control circuit () controls the timing at which the square wave voltage transitions such that an instantaneous value of the square wave voltage is preserved in either the DC voltage or a turnover voltage, when the coil current zero crosses.