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:
Feb. 25, 2025
Filed:
Apr. 20, 2023
Mitsubishi Electric Corporation, Tokyo, JP;
Ryo Shinohara, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An electrical power conversion apparatus is provided in which a heat generation abnormality-state such as an abnormal state of a cooling device is determined earlier in its determination, so that it becomes possible to securely perform a protective operation even in the heat generation abnormality-state. A control device estimates a change rate of a temperature detection value on the basis of a switching-element loss calculation value of a semiconductor switching element(s) calculated at least based on an electric current detection value, and compares a temperature-detection change-rate calculation value calculated from a temperature detection value with a temperature-detection change-rate estimation value, so that a heat generation abnormality-state of the semiconductor switching element(s) is estimated.