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. 24, 2012
Filed:
Sep. 03, 2010
Tsuyoshi Higuchi, Fukuoka, JP;
Kenji Yamada, Fukuoka, JP;
Tsuyoshi Higuchi, Fukuoka, JP;
Kenji Yamada, Fukuoka, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
An output filter includes a polyphase common-mode filter having a polyphase common-mode choke connected to an output of a power converter at one end, a first polyphase capacitor connected to the other end of the polyphase common-mode choke at one end, and a neutral-point detecting transformer connected to the other end of the first polyphase capacitor at one end; a capacitor/resistor series-connected body connected to a frame ground of the power converter at one end and connected to the other end of the neutral-point detecting transformer at the other end; and a polyphase normal-mode filter having a polyphase normal-mode choke connected to the other end of the polyphase common-mode choke at one end, and a second polyphase capacitor connected to the other end of the polyphase normal-mode choke at one end and having the other ends connected together and further connected to the one end of the capacitor/resistor series-connected body.