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:
Jul. 20, 2021
Filed:
Sep. 11, 2014
Mitsubishi Electric Corporation, Chiyoda-ku, JP;
Yoshitaka Naka, Chiyoda-ku, JP;
Yasushi Nakayama, Chiyoda-ku, JP;
Yoshiko Tamada, Chiyoda-ku, JP;
Hiroyuki Takagi, Chiyoda-ku, JP;
Junichiro Ishikawa, Chiyoda-ku, JP;
Kazuhiro Otsu, Chiyoda-ku, JP;
Naohiko Mitomi, Chiyoda-ku, JP;
MITSUBISHI ELECTRIC CORPORATION, Tokyo, JP;
Abstract
A short-circuit protection circuit for a self-arc-extinguishing type semiconductor element includes a first protection circuit and a second protection circuit. The first protection circuit is configured to reduce a voltage between a control electrode and a first main electrode of the self-arc-extinguishing type semiconductor element when detecting overcurrent flowing between the first main electrode and a second main electrode. The second protection circuit is configured to: detect current flowing in an interconnection adapted to supply the drive voltage; determine, based on the detected current, whether the first protection circuit is in an operating state; and change the drive voltage to turn off the self-arc-extinguishing type semiconductor element when the first protection circuit is in the operating state.