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. 09, 2014
Filed:
Jan. 17, 2013
Applicant:
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05K 7/20 (2006.01);
U.S. Cl.
CPC ...
H05K 7/20336 (2013.01); H05K 7/2089 (2013.01); H05K 7/20936 (2013.01);
Abstract
A cooler of a power converting device for a railroad vehicle has heat exchanger tubes or heat radiator fins disposed to enhance the cooling performance of semiconductor devices arranged on an upper level of the multiple semiconductor devices arranged in multiple rows. Temperature detecting elements are arranged to detect temperature of the semiconductor devices arranged on a lower level on a windward side and a leeward side with respect to a traveling wind performing heat exchange with the heat radiator fins, and are arranged to detect temperature of the semiconductor devices arranged on the upper level at a center area thereof.