Method and apparatus to regulate a voltage controller
US5689177A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Jan 11, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03C2201/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.