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. 07, 2011
Filed:
Aug. 24, 2007
Kenji Isomoto, Kitakyushu, JP;
Kenji Isomoto, Kitakyushu, JP;
Kabushiki Kaisha Yaskawa Denki, Fukuoka, JP;
Abstract
A motor controller, which is inexpensive and has small size, is provided by reducing the size of a heat sink used in the motor controller and the number of all parts of the motor controller, wherein said motor controller includes a heat sink, a power semiconductor modules that is in close contact with the heat sink, a substrate () that is electrically connected to the power semiconductor module, and a fan () that generates the flow of external air and supplies cooling air to the heat sink, wherein said heat sink is formed by combining two kinds of heat sinks, which include a first heat sink () and a second heat sink (), so as to conduct heat therebetween, and, wherein said power semiconductor module is in close contact with the second heat sink ().