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:
Apr. 06, 1982
Filed:
Mar. 05, 1980
Applicant:
Inventor:
John M Leach, Wrexham, GB;
Assignee:
Gould Advance Limited, Hainault, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323224 ; 323272 ; 323285 ; 323351 ;
Abstract
An a.c. regulator is disclosed including series and shunt choppers connected between a source of alternating current and an output, each chopper including a pair of unidirectional controlled rectifying paths connected in parallel opposition. The invention is characterized by the provision of a control circuit including a load current sensor for sensing the direction of flow of load current, the control being connected to render conductive a selected one of the transistors in the shunt chopper alternately with a selected one of the transistors in the series chopper, the alternation occurring at a frequency that is high relative to the supply voltage frequency.