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:
Dec. 30, 2014
Filed:
Jul. 26, 2012
Taisuke Katayama, Fukuoka, JP;
Ryuji Suenaga, Fukuoka, JP;
Kazuhiro Umeo, Fukuoka, JP;
Eiji Yamamoto, Fukuoka, JP;
Taisuke Katayama, Fukuoka, JP;
Ryuji Suenaga, Fukuoka, JP;
Kazuhiro Umeo, Fukuoka, JP;
Eiji Yamamoto, Fukuoka, JP;
Kabushiki Kaisha Yaskawa Denki, Kitakyushu-Shi, JP;
Abstract
A series-connected multi-level power conversion device according to an aspect of embodiments includes a multi-winding transformer and a power conversion unit. The multi-winding transformer has a relationship that n secondary windings respectively connected to n single-phase power converters in the same output phase have a voltage phase difference of 60/n degrees and a relationship that the m secondary windings respectively connected to the m single-phase power converters corresponding to the m output phases have a voltage phase difference of 60/m degrees.