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:
Apr. 14, 2009
Filed:
Aug. 23, 2006
Applicants:
Masayuki Hirota, Narashino, JP;
Satoshi Ibori, Yachimata, JP;
Tomoya Kamezawa, Narashino, JP;
Jiangming Mao, Narashino, JP;
Inventors:
Masayuki Hirota, Narashino, JP;
Satoshi Ibori, Yachimata, JP;
Tomoya Kamezawa, Narashino, JP;
Jiangming Mao, Narashino, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01G 4/228 (2006.01);
U.S. Cl.
CPC ...
Abstract
A frequency converter in which the inductance is reduced by enlarging the forms of bus bars which connect a P phase, an N phase of an inverter part and a positive electrode or a negative electrode of smoothing capacitors and the form of a wiring bus bar which connects an intermediate layer of capacitors which are connected in series to enlarge areas where they overlap each other, and by making currents flow in the opposite directions to each other.