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:
Oct. 19, 2010
Filed:
Aug. 24, 2007
Shigekatsu Nagatomo, Kitakyushu, JP;
Koji Nuki, Kitakyushu, JP;
Shigekatsu Nagatomo, Kitakyushu, JP;
Koji Nuki, Kitakyushu, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
A motor controller capable of relaxing the temperature of a heat source which generates heat by driving the motor controller, and capable of realizing miniaturization and low price is provided. In a motor controller in which a power semiconductor module () which closely contact a heat sink () is mounted on a substrate (), and a fan () is attached to the heat sink () by a fan case (), portions of fins () of the heat sink () are formed with a bell mouth () and a circular-arc-shaped guide (), and the radiating capability of the fins () is improved by effectively using the wind of the fan ().