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:
Oct. 19, 2004
Filed:
Jun. 03, 2003
Katsutaka Tanabe, Okayama, JP;
Nobuyuki Toyoura, Okayama, JP;
Seiji Oka, Okayama, JP;
Masao Mabuchi, Okayama, JP;
Kotaro Nakamura, Okayama, JP;
Yuji Tsurukawa, Kumamoto, JP;
Kenichi Inoue, Okayama, JP;
Omron Corporation, Kyoto, JP;
Abstract
An electric power conversion device comprises switching elements making up a push-pull converter, a pulse transformer T, a rectification diode D , a rectification diode D , a choke coil L, a smoothing capacitor C, a DC magnetic deviation prevention means , and an inverter . The DC magnetic deviation prevention means detects the coil currents I , I flowing in the primary windings M , M of the pulse transformer T. By controlling (shortening) the on time of the switching element having a greater amount of current, the coil currents I , I are balanced (I =I ), thereby preventing the magnetic deviation phenomena of the pulse transformer T.