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. 19, 1998
Filed:
Sep. 05, 1997
Applicant:
Inventor:
Takemitsu Higuchi, Osaka, JP;
Assignees:
The Kansai Electric Power Co., Inc., Osaka, JP;
Kansai Tech Corporation, Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G05B / ; G05F / ; H02H / ;
U.S. Cl.
CPC ...
323320 ; 323237 ; 363 54 ;
Abstract
A semiconductor switching circuit using semiconductor devices includes steep front wave thyristors which are connected in parallel and inverse with each other in their forward directions. An inductor is connected in series between a power source and the semiconductor switching circuit. The semiconductor switching circuit has an instant disconnection time of 100 to 1000 microseconds.