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:
Sep. 05, 2006
Filed:
May. 08, 2003
Masayuki Takenaka, Aichi-ken, JP;
Naruhiko Kutsuna, Aichi-ken, JP;
Kozo Yamaguchi, Aichi-ken, JP;
Aisin Aw Co., Ltd., Aichi-ken, JP;
Abstract
A drive unit comprises an electric motor, a drive unit casingaccommodating therein the electric motor, an inverterthat controls the electric motor, and a flow passage of a refrigerant that cools the inverter. The inverter is mounted on a heat sinkand mounted to the drive unit casing with a space R defined, and the space is communicated to the flow passage of the refrigerant. The heat sink comprises fins, and the drive unit casing comprises fins, the both fins being apart from each other. Thereby, both a side of the drive unit casing and a side of the heat sink are effectively cooled by heat exchange with a cooling refrigerant in wide areas. Also, the fins are apart from each other whereby direct heat conduction is avoided and efficient cooling is enabled with temperature gradient conformed to heat-resistant temperatures.