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. 18, 1997
Filed:
Jan. 11, 1996
Michael H Nielsen, The Woodlands, TX (US);
Alan D Berger, Pittsburgh, PA (US);
Vinton P Coffman, Pittsburgh, PA (US);
The Babcock & Wilcox Company, New Orleans, LA (US);
Abstract
The present invention is directed to an automatic voltage controller for an electrostatic precipitator. The invention maintains a database of operating parameters, such as the firing angle of the silicon controlled rectifiers, during previous breakdowns. The data is used for statistical analysis of the process conditions of the precipitator, enabling the invention to more accurately predict the breakdown level of the system, and providing tolerance of erratic or atypical breakdowns. The invention assembles a 'rolling' data set of a predetermined number of previous breakdowns from which the invention continuously extracts a mean value and a standard deviation value, which are used to determine the setback level and the ramp level.