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:
Jun. 09, 1987
Filed:
Sep. 03, 1986
Applicant:
Inventors:
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Engineering Co., Ltd., Hitachi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
363 56 ; 307263 ; 363 98 ; 363132 ;
Abstract
An inverter that has one or more transistors for supplying current to a load with one or more phases is provided with an overcurrent protection for the transistor. The changing rate for reducing the base current to the transistor upon the detection of an overcurrent is reduced according to a separate delay circuit so that the transistor will not be destroyed by an over voltage that would otherwise occur due to a rapid drop in current passing through the transistor and the inductance of the load circuit including the transistor.
Quick Actions:
Toriyama, Minoru. (1987). Overcurrent and overvoltage protected transistor inverter (U.S. Patent No. 4672524). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4672524
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile