Method and device for closed-loop control of the electrode gap in a vacuum arc furnace
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United States of America Patent
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Jan 3, 2017
Grant Date -
Oct 24, 2013
app pub date -
Oct 6, 2011
filing date -
Oct 21, 2010
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Abstract
A method and a device for closed-loop control of an electrode gap in a vacuum arc furnace subjects an electrode gap of a melting electrode from the surface of a melt material to closed-loop control as a function of a droplet short-circuit rate. For this purpose, a histogram of detected droplet short-circuits is created on the basis of at least one droplet short-circuit criterion. The histogram is subdivided into sub-areas, a characteristic sub-area of the histogram is selected for closed-loop control purposes. The electrode gap is subjected to closed-loop control on the basis of the droplet short-circuits which can be associated with the selected sub-area.
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