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:
Jul. 15, 2003
Filed:
Jan. 03, 2002
Applicant:
Inventors:
Kazuhiro Nakayama, Tsurugashima, JP;
Shigeo Abe, Tsurugashima, JP;
Assignee:
Toko Kabushiki Kaisha, Tokyo-To, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F 2/724 ;
U.S. Cl.
CPC ...
H01F 2/724 ;
Abstract
A conventional braided wire has high direct current resistance and high winding resistance in high-frequency regions, making it impossible to achieve a power conversion transformer having sufficient conversion efficiency. In the present invention, a braided wire is braided from three or more cluster wires, each comprising multiple strands, and is used as winding material for a leakage flux-type power conversion transformer. The braid pitch of the braided wire is set so that the ratio between one-turn winding length and the braid pitch is between 0.5 and 2.5.