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:
Aug. 04, 1987
Filed:
Apr. 28, 1986
Jeffrey M Powell, Galena, OH (US);
Liebert Corporation, Columbus, OH (US);
Abstract
Power conditioning apparatus exhibiting enhanced stability with respect to lagging phase angle conditions incurred in conjunction with load derived transients. The apparatus employs a synthesizer network structured having a regulator which is fashioned as a non-linear saturable transformer in parallel with a capacitor bank and which is supplied from a utility line source through input inductors. The saturable transformer components and associated capacitors form a ferroresonant circuit wherein the reactive components operate beyond the knee of a conventional magnetization curve. To develop the stiffness to suddenly lagging phase angle otherwise encountered with such synthesizers, a induction or synchronous motor is employed at the output of the regulators which operates in essentially no load fashion to create a stable output in the presence of load transient phenomena. An odd harmonic trap arrangement is provided to assure stability under severe operational conditions such as single phasing.