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:
Feb. 24, 2009
Filed:
Sep. 13, 2004
Applicants:
Hidenori Hara, Fukuoka, JP;
Junkoo Kang, Fukuoka, JP;
Eiji Yamamoto, Fukuoka, JP;
Kenji Yamada, Fukuoka, JP;
Inventors:
Hidenori Hara, Fukuoka, JP;
Junkoo Kang, Fukuoka, JP;
Eiji Yamamoto, Fukuoka, JP;
Kenji Yamada, Fukuoka, JP;
Assignee:
Kabushiki Kaisha Yaskawa Denki, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 5/45 (2006.01);
U.S. Cl.
CPC ...
Abstract
A PWM cycloconverter easily capable of improving an input current waveform and regenerating energy of a snubber into a power source is provided. A PWM cycloconverter includes a PWM converter connected to a DC voltage system. An output unit of the PWM converter is connected to a place before an input filter of the PWM cycloconverter to keep down resonance of the input filter.