Method of controlling intermittent voltage supply to an electros

Details Method of controlling intermittent voltage supply to an electros Method of controlling intermittent voltage supply to an electros

1985-12-12

1986-12-02

Prunner, Kathleen J.

Gas separation

Means within gas stream for conducting concentrate to collector

55105, 323903, B03C 368

Patent

active

046262610

ABSTRACT:
In the method of controlling the period length of an intermittent voltage supply to an electrostatic precipitator, a search procedure is carried out at predetermined time intervals or at time intervals determined by one or more continuously monitored/measured precipitator or operational parameters. During the search procedure either the number of system voltage half-periods during which the power supply to the precipitator is cut off (the length of the non-conduction (n.sub.p) period), or the number of system voltage half-periods during which the power supply supplies current to the precipitator (the length of the conduction period), are changed according to a predetermined scale or to a scale determined by one or more precipitator or operational parameters. The charge transmitted per system half-period is current in the precipitator divided by the total number of half-periods of conduction per second. The search is stopped when the relation between the charge transmitted per system half-period and the maximum voltage at transition from one search stage to the succeeding one remains constant or increases and the number of system half-periods, of conduction or non-conduction (n.sub.p) respectively, existing when the search is stopped is maintained until the next search procedure.

REFERENCES:
patent: 3984215 (1976-10-01), Zucker
patent: 4138233 (1979-02-01), Masuda
patent: 4410849 (1983-10-01), Ando
patent: 4486704 (1984-12-01), Gustafsson et al.
patent: 4502002 (1985-02-01), Ando

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