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AssigneeSiemens Aktiengesellschaft
InventorsHelmut Herklotz, Gunter Mehler, Franz Neulinger, Helmut Schummer, Horst Daar, Walter Schmidt, Heinrich Winkler
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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.
A method for automatically controlling the voltage of an electrostatic filter with respect to its breakdown voltage limit, the method having the steps of increasing the filter voltage as a function of time until a voltage breakdown is detected, and reducing the filter voltage by a predetermined amount after the voltage breakdown is detected, the invention comprising the further steps of:
An arrangement for automatically controlling the voltage of an electrostatic filter with respect to its breakdown voltage limit, the arrangement having a transformer which is coupled at its primary winding to an AC network by a control element, and at its secondary winding to a rectifier for supplying DC energy to the electrostatic filter, the arrangement being of the type which is further provided with a microcomputer system for computing a control voltage which controls the control element, the computation being performed from measured data and stored operating parameters, the arrangement further comprising:
Dependencies are inferred from the claim text.