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:
Sep. 15, 2020
Filed:
Apr. 18, 2017
Applicant:
Mitsubishi Electric Corporation, Chiyoda-ku, Tokyo, JP;
Inventors:
Kenta Uchida, Tokyo, JP;
Ryosuke Nakagawa, Tokyo, JP;
Assignee:
MITSUBISHI ELECTRIC CORPORATION, Chiyoda-Ku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 7/12 (2006.01); G01R 19/12 (2006.01); G01R 19/165 (2006.01); H02H 1/00 (2006.01); H02M 7/537 (2006.01);
U.S. Cl.
CPC ...
H02H 7/1203 (2013.01); G01R 19/12 (2013.01); G01R 19/16571 (2013.01); H02H 1/0007 (2013.01); H02M 7/537 (2013.01);
Abstract
An overcurrent detection circuit includes a di/dt detection circuit to detect di/dt of a current Ie that flows in an emitter of an IGBT, a control circuit to detect whether the current Ie is an overcurrent based on di/dt and to output a detection result to a driving circuit, and a mask circuit to set a mask period in which an operation of overcurrent determination in the control circuit is masked.