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. 07, 1994
Filed:
Aug. 16, 1993
Michael B Brennen, Pittsburgh, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
The present invention provides an improved active power line conditioner which achieves a significant improvement in peak voltage regulation capability when compared with a similarly-sized device of the prior art. Enhanced peak voltage regulation capability is achieved by reducing the number of turns on the transformer winding connected to the series inverter. As a result, the AC regulation voltage induced across the transformer primary and added to or subtracted from the AC supply voltage will be capable of achieving higher peak levels of short duration. When a reduced-turns-ratio transformer is utilized according to the invention, variations of the AC supply voltage which are within the sinusoidal regulation range of a prior art active power line conditioner having a similarly-sized transformer, the output voltage will remain sinusoidal. When, however, the input voltage variation is outside of this sinusoidal regulation range, the reduced-turns-ratio transformer will create a peaking but nonsinusoidal AC output voltage. This allows rejection of higher magnitude input voltage disturbances of short duration.