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:
Dec. 30, 2025
Filed:
Aug. 03, 2023
Hitachi, Ltd., Tokyo, JP;
Hiroshi Kamizuma, Tokyo, JP;
Hangxian Gao, Tokyo, JP;
Tetsuya Kawashima, Tokyo, JP;
Masahiro Seo, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
There is provided a power conversion apparatus including a first power semiconductor module, a second power semiconductor module, a control circuit for driving the first power semiconductor module and the second power semiconductor module, and liquid-cooling type cooling jackets, wherein the second power semiconductor module is disposed closer to an upper surface in the gravity direction than the first power semiconductor module is, the cooling jackets include a refrigerant containing hydrogen molecules and a refrigerant flow path at least between the first power semiconductor module and the second power semiconductor module, and the control circuit performs control such that the operating time period of the second power semiconductor module is shorter than the operating time period of the first power semiconductor module.