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:
Nov. 01, 1977
Filed:
Mar. 23, 1976
Applicant:
Inventor:
Wolfgang Knauer, Malibu, CA (US);
Assignee:
Hughes Aircraft Company, Culver City, CA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361-4 ; 361-2 ;
Abstract
Large current is interrupted against high voltage by a high speed mechanical opening line switch connected in series with a saturable reactor. A commutation capacitor is discharged through the closed switch against the line current to produce a current zero. Near the time of current zero the line switch is opened to produce arc free interruption. A dV/dt capacitor is paralleled around the switch to limit the rate of voltage rise. High contact speed of the line switch limits the size of the required dV/dt capacitor to what can be justified economically.