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:
May. 26, 2009
Filed:
Jul. 22, 2005
Hiroshi Yamabuchi, Tokyo, JP;
Ryoji Nishiyama, Tokyo, JP;
Yuji Kuramoto, Tokyo, JP;
Satoshi Ishibashi, Tokyo, JP;
Hiroshi Yamabuchi, Tokyo, JP;
Ryoji Nishiyama, Tokyo, JP;
Yuji Kuramoto, Tokyo, JP;
Satoshi Ishibashi, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A cooling system of a power semiconductor module of the invention includes a temperature detection sensor provided in a semiconductor element as a heat source provided in a power semiconductor module, and a controller which estimates a change of a heat transfer coefficient from the power semiconductor module to cooling water based on output information Tj of the temperature detection sensor and drive output information Sr of a rotation speed detection sensor for a pump motor to drive a cooling pump, controls the pump motor according to this estimated result, and controls cooling capacity of the cooling water.