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:
Oct. 24, 1978
Filed:
Apr. 25, 1977
Applicant:
Inventor:
Shigehiko Suzuki, Inazawa, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323 24 ; 307239 ; 323 25 ; 323 34 ;
Abstract
In a three-phase AC voltage control circuit containing reverse parallel connections of a thyristor and a diode or reverse parallel connections of thyristors in at least two phases, each asymmetrical AC voltage obtained by applying a line voltage of the power source having 30 degrees of phase lead from that of the phase voltage of the power source in the phase containing the thyristor to each polarized delay circuit is used as the power source for a firing angle control circuit of the thyristor in the phase.