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. 07, 2024
Filed:
Jul. 13, 2020
Hitachi Astemo, Ltd., Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
Provided is a novel power conversion device that enables estimation of a temperature of a power device without using a temperature sensing diode and can accurately estimate a temperature and a current of a current sensing element that observes a main current. A measurement voltage (Vref) is applied between source terminals (and) of a main control elementand a current sensing elementin a state in which the main control elementand the current sensing elementare turned off, and a temperature of a power deviceis estimated from a current (Ib) flowing between the source terminals (and) of the main control elementand the current sensing elementat the time of the application by using the fact that a resistance value of a semiconductor substrate between the source terminals of the main control elementand the current sensing elementhas temperature dependency.