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. 30, 2018
Filed:
Mar. 13, 2015
Hitachi, Ltd., Chiyoda-ku, Tokyo, JP;
Ryuusei Fujita, Tokyo, JP;
Satoru Akiyama, Tokyo, JP;
Hiroshi Kageyama, Tokyo, JP;
Toru Masuda, Tokyo, JP;
Ayumu Hatanaka, Tokyo, JP;
Akio Shima, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The object of the present invention is to compensate for a difference in threshold voltage between a plurality of switching devices incorporated in a power module. The present invention solves the subject described above by mounting a switching device having a high threshold voltage in comparison with a different switching device at a location at which the temperature of the power module during operation is higher than that at another location at which the different switching device is mounted. Eventually, a power conversion apparatus of a high performance and a vehicle drive apparatus of a high performance can be provided.