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Title:
SENSING AND CONTROL OF POSITION OF AN ELECTRICAL DISCHARGE
Document Type and Number:
WIPO Patent Application WO/2019/139695
Kind Code:
A1
Abstract:
Sensors measure magnetic field components, and the measured fields are used to calculate and estimated transverse position of a longitudinal electric current flowing as an electric discharge across a discharge gap. Based on the estimated position, and according to a selected transverse trajectory or distribution of the estimated discharge position, magnetic fields are applied transversely across the discharge gap so as to control or alter the estimated discharge position. Inventive apparatus and methods can be employed, inter alia, during operation of a vacuum arc furnace.

Inventors:
CIBULA, Matthew, A. (Ampere Scientific, 1546 Industrial Way SWAlbany, OR, 97321, US)
MOTLEY, Joshua, R. (Ampere Scientific, 1546 Industrial Way SWAlbany, OR, 97321, US)
WOODSIDE, C., Rigel (Ampere Scientific, 1546 Industrial Way SWAlbany, OR, 97321, US)
KING, Paul, E. (Ampere Scientific, 1546 Industrial Way SWAlbany, OR, 97321, US)
Application Number:
US2018/063950
Publication Date:
July 18, 2019
Filing Date:
December 05, 2018
Export Citation:
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Assignee:
KW ASSOCIATES LLC (1546 Industrial Way SW, Albany, OR, 97321, US)
International Classes:
F27B3/08; F27B3/28; G01R33/06; C21C5/52
Foreign References:
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US201715715018A2017-09-25
Other References:
RIGEL WOODSIDE: "Arc Distribution and Motion During the Vacuum Arc Remelting Process As Detected with a Magnetostatic Approach", SCHOLARSARCHIVE@OSU, 9 July 2010 (2010-07-09), XP055430503, Retrieved from the Internet [retrieved on 20171130], DOI: http://hdl.handle.net/1957/16497
C. RIGEL WOODSIDE ET AL: "Arc Distribution During the Vacuum Arc Remelting of Ti-6Al-4V", METALLURGICAL AND MATERIALS TRANSACTIONS B, vol. 44, no. 1, 7 December 2012 (2012-12-07), US, pages 154 - 165, XP055430859, ISSN: 1073-5615, DOI: 10.1007/s11663-012-9760-1
ZANNER ET AL.: "Observations of melt rate as a function of ... during vacuum consumable arc remelting of...", METALLURGICAL & MATERIALS TRANSACTIONS B, vol. 15, 1984, pages 117
ZANNER ET AL.: "On the Origin of Defects in VAR Ingots", INTERNATIONAL SYMPOSIUM ON LIQUID METAL PROCESSING AND CASTING, 2005, pages 13
WARD ET AL.: "Ensemble Arc Motion & Solidification During the Vacuum Arc Remelting of a Nickel-based Superalloy", INT'L SYMP ON LIQUID METAL PROCESSING & CASTING, 2005, pages 49
WOODSIDE: "Investigating arc behavior in a DC vacuum arc remelting furnace using magnetic flux density measurements; masters thesis", 2008, OREGON STATE UNIVERSITY
WOODSIDE: "Arc Distribution and Motion During the Vacuum Arc Remelting Process As Detected with a Magnetostatic Approach", 2010, PHD DISSERTATION
WOODSIDE ET AL.: "A Measurement System for Determining the Positions of Arcs During Vacuum Arc Remelting", IEEE INT'I INSTRUMENTATION & MEASUREMENT TECH CONF, 2010, pages 452, XP031691645
WOODSIDE ET AL.: "Characterizing Arc Motion and Distribution During Vacuum Arc Remelting", INT'L SYMP ON LIQUID METAL PROCESSING & CASTING, vol. 75, 2009
WOODSIDE ET AL.: "Arc Distribution During the Vacuum Arc Remelting of Ti-6AI-4V", METALLURGICAL & MATERIALS TRANSACTIONS B, vol. 44, no. 1, 2012, pages 154, XP055430859, DOI: doi:10.1007/s11663-012-9760-1
Attorney, Agent or Firm:
ALAVI, David, S. (2852 Willamette Street #402, Eugene, OR, 97405, US)
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