Patent · US Expired

System for automatically controlling the breakdown voltage limit of an electrofilter

US4382805A · kind A · utility

4Cited by

6References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Helmut Herklotz · Neu-Isenburg, DE
Gunter Mehler · Frankfurt am Main, DE
Franz Neulinger · Langen (Hessen), DE
Helmut Schummer · Heusenstamm, DE
Horst Daar · Erlangen, DE
Walter Schmidt · Bellikon, CH
Heinrich Winkler · Nuremberg, DE

Key dates

Filing date	Apr 9, 1981
Grant date	May 10, 1983
Priority date	—
Expiry date	Apr 9, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S323/903
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A system for automatically controlling the voltage of an electrostatic filter with respect to its breakdown voltage limit. The detection of secondary voltage breakdowns which occur within a post-breakdown time period after an initial voltage breakdown cause the filter voltage to be lowered to zero value. After a deionizing time period, the filter voltage is gradually raised during a predetermined rise time period until it reaches a new value. The duration of the deionizing time period and the rise time period may be advantageously computed in response to the history of voltage breakdowns, by a microcomputer system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.