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:
Jun. 16, 2009
Filed:
Mar. 30, 2005
Hikaru Meguro, Chiyoda-ku, JP;
Hiroshi Ikarashi, Chiyoda-ku, JP;
Keizo Shimada, Chiyoda-ku, JP;
Masashi Toyota, Chiyoda-ku, JP;
Hikaru Meguro, Chiyoda-ku, JP;
Hiroshi Ikarashi, Chiyoda-ku, JP;
Keizo Shimada, Chiyoda-ku, JP;
Masashi Toyota, Chiyoda-ku, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
By reduction in loss and noise of a three-phase reactor on the AC side of an electric power converter, compactness and reduction in weight of the reactor are realized, and countermeasures for heat and noise are reduced, and a specific frequency component is reduced, thus cost reduction and conversion efficiency are improved, and carriers of a controller are prepared in correspondence to the phases of the electric power converter, and moreover a phase difference of each carrier is set properly.