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. 17, 2012
Filed:
Jun. 26, 2008
Satoshi Ibori, Yachimata, JP;
Koji Hamano, Narashino, JP;
Jiangming Mao, Narashino, JP;
Tomoya Kamezawa, Narashino, JP;
Masayuki Hirota, Narashino, JP;
Masahiro Hiraga, Yotsukaido, JP;
Satoshi Ibori, Yachimata, JP;
Koji Hamano, Narashino, JP;
Jiangming Mao, Narashino, JP;
Tomoya Kamezawa, Narashino, JP;
Masayuki Hirota, Narashino, JP;
Masahiro Hiraga, Yotsukaido, JP;
Hitachi Industrial Equipment Systems Co., Ltd., Tokyo, JP;
Abstract
In the present invention, miniaturization of an electric power conversion system is made possible while the reduction of a rise in temperature is achieved through a cooling operation by a cooling fan. The electric power conversion system is provided with a casing for covering cooling fins for cooling power semiconductors, a main circuit board having a driver circuit for driving the power semiconductors, and a cover for covering up the main circuit board. The system includes a first airflow hole provided at a part of the main circuit board, on the upper side of an air-intake provided in the cover, and a second airflow hole provided on the lower side of the first airflow hole, and on the lower side of the cooling fins, wherein air from the second airflow hole is driven to the cooling fins by a cooling fan.