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. 25, 2021
Filed:
Apr. 24, 2018
Applicant:
Fuji Electric Co., Ltd., Kanagawa, JP;
Inventor:
Hirotoshi Kaneda, Matsumoto, JP;
Assignee:
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/28 (2006.01); H03K 17/082 (2006.01); G01R 31/50 (2020.01); H02H 1/00 (2006.01); H02H 3/16 (2006.01);
U.S. Cl.
CPC ...
H03K 17/0822 (2013.01); G01R 31/281 (2013.01); G01R 31/50 (2020.01); H02H 1/0007 (2013.01); H02H 3/16 (2013.01);
Abstract
A first aspect of the present invention will provide a short circuit detector, including: a voltage detection circuit to detect gate voltage which is input from a gate driving circuit to the semiconductor element; and a short circuit detection circuit to detect a short circuit state of the semiconductor element, when gate voltage of the semiconductor element becomes higher than or equal to first reference voltage in a transition period from when a turn-on signal is input to the gate driving circuit until when a mirror period of the semiconductor element starts.