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. 03, 2006
Filed:
Sep. 16, 2003
Keiichi Satou, Daito, JP;
Shinichi Sakai, Nara, JP;
Kenji Yasui, Yamatokoriyama, JP;
Haruo Suenaga, Katano, JP;
Keiichi Satou, Daito, JP;
Shinichi Sakai, Nara, JP;
Kenji Yasui, Yamatokoriyama, JP;
Haruo Suenaga, Katano, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Nifco Inc., Kanagawa, JP;
Abstract
In a step-up transformer for magnetron driving in which two ferrite cores are opposed to each other with a gap G interposed therebetween, thereby forming a magnetic circuit including a middle core section, an outer core section and a coupling core section for coupling the middle core section and the outer core section, and a primary winding and a secondary winding are arranged to surround the middle core respectively, a sectional area of the middle core is increased, a number of winds in a radial direction of each of the primary winding and the secondary winding is increased and a number of winds in an axial direction is decreased, and the primary winding and the secondary winding are provided close to each other and a ratio of the sectional area of the middle core to that of the outer core is decreased to be 2:1 or less.