Pool power control in remelting systems

Williamson, Rodney L; Melgaard, David K; Beaman, Joseph J

Title: Pool power control in remelting systems

Abstract

An apparatus for and method of controlling a remelting furnace comprising adjusting current supplied to an electrode based upon a predetermined pool power reference value and adjusting the electrode drive speed based upon the predetermined pool power reference value.

Inventors:

Williamson, Rodney L ^[1]; Melgaard, David K ^[1]; Beaman, Joseph J ^[2]

Albuquerque, NM
Austin, TX

Issue Date:: 2011-12-13

Research Org.:: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1034295

Patent Number(s):: 8077754

Application Number:: US patent applciation 11/501,198

Assignee:: Williamson, Rodney L. (Albuquerque, NM); Melgaard, David K. (Albuquerque, NM); Beaman, Joseph J. (Austin, TX

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

F - MECHANICAL ENGINEERING F27 - FURNACES F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE

Show more

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P10/25 - by increasing the energy efficiency of the process

F - MECHANICAL ENGINEERING F27 - FURNACES F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
F27D11/08 - Heating by electric discharge, e.g. arc discharge
F27D19/00 - Arrangements of controlling devices

F - MECHANICAL ENGINEERING F27 - FURNACES F27B - FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
F27B3/085 - {Arc furnaces}

F - MECHANICAL ENGINEERING F27 - FURNACES F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
F27D21/00 - Arrangements of monitoring devices

H - ELECTRICITY H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR H05B - ELECTRIC HEATING
H05B7/144 - Power supplies specially adapted for heating by electric discharge

Show less

DOE Contract Number:: AC04-94AL85000

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 47 OTHER INSTRUMENTATION

Citation Formats


                    Williamson, Rodney L, Melgaard, David K, and Beaman, Joseph J. Pool power control in remelting systems.  United States: N. p., 2011. 
        Web.

Copy to clipboard


                    Williamson, Rodney L, Melgaard, David K, & Beaman, Joseph J. Pool power control in remelting systems.  United States.

Copy to clipboard


                    Williamson, Rodney L, Melgaard, David K, and Beaman, Joseph J. Tue .  
        "Pool power control in remelting systems".  United States.  https://www.osti.gov/servlets/purl/1034295.

Copy to clipboard


                    
@article{osti_1034295,

  title        = {Pool power control in remelting systems},

  author       = {Williamson, Rodney L and Melgaard, David K and Beaman, Joseph J},

  abstractNote = {An apparatus for and method of controlling a remelting furnace comprising adjusting current supplied to an electrode based upon a predetermined pool power reference value and adjusting the electrode drive speed based upon the predetermined pool power reference value.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2011},

  month        = {12}

}

Copy to clipboard

Patent:

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Model-based melt rate control during vacuum arc remelting of alloy 718
journal, February 2004

Williamson, Rodney L.; Melgaard, David K.; Shelmidine, Gregory J.
Metallurgical and Materials Transactions B, Vol. 35, Issue 1
https://doi.org/10.1007/s11663-004-0100-y

Model based gap and melt rate control for VAR of Ti-6Al-4V
journal, December 2004

Beaman, J. J.; Williamson, R. L.; Melgaard, D. K.
Journal of Materials Science, Vol. 39, Issue 24
https://doi.org/10.1023/B:JMSC.0000048726.57741.de

Similar Records in DOE Patents and OSTI.GOV collections:

Apparatus to control the total energy flux into the top ingot surface during vacuum arc remelting processes

Patent Williamson, Rodney L.; Melgaard, David K.; Beaman, Joseph J.

A Vacuum Arc Remelting controller apparatus wherein process control is accomplished primarily through control of pool power. Pool power being defined as the total energy flux into a top ingot surface of the VAR ingot. The controller apparatus of the present invention comprises a controller computer that transmits commands to the host furnace through an ethernet connection.
Full Text Available
Controlling electrode gap during vacuum arc remelting at low melting current

Patent Williamson, Rodney L [Albuquerque, NM]; Zanner, Frank J [Sandia Park, NM]; Grose, Stephen M [Glenwood, WV]

An apparatus and method for controlling electrode gap in a vacuum arc remelting furnace, particularly at low melting currents. Spectrographic analysis is performed of the metal vapor plasma, from which estimates of electrode gap are derived.
Full Text Available
Constant voltage electro-slag remelting control

Patent Schlienger, Max E [Albuquerque, NM]

A system for controlling electrode gap in an electro-slag remelt furnace has a constant regulated voltage and an eletrode which is fed into the slag pool at a constant rate. The impedance of the circuit through the slag pool is directly proportional to the gap distance. Because of the constant voltage, the system current changes are inversely proportional to changes in gap. This negative feedback causes the gap to remain stable.
Full Text Available
Dynamic control of remelting processes

Patent Bertram, Lee A [Dublin, CA]; Williamson, Rodney L [Albuquerque, NM]; Melgaard, David K [Albuquerque, NM]; ...

An apparatus and method of controlling a remelting process by providing measured process variable values to a process controller; estimating process variable values using a process model of a remelting process; and outputting estimated process variable values from the process controller. Feedback and feedforward control devices receive the estimated process variable values and adjust inputs to the remelting process. Electrode weight, electrode mass, electrode gap, process current, process voltage, electrode position, electrode temperature, electrode thermal boundary layer thickness, electrode velocity, electrode acceleration, slag temperature, melting efficiency, cooling water temperature, cooling water flow rate, crucible temperature profile, slag skin temperature, and/ormore » « less
Full Text Available
Directly induced swing for closed loop control of electroslag remelting furnace

Patent Damkroger, Brian [Corrales, NM]

An apparatus and method for controlling an electroslag remelting furnace, imposing a periodic fluctuation on electrode drive speed and thereby generating a predictable voltage swing signal. The fluctuation is preferably done by imposition of a sine, square, or sawtooth wave on the drive dc offset signal.
Full Text Available

Similar Records

Title: Pool power control in remelting systems

Abstract

Citation Formats

Model-based melt rate control during vacuum arc remelting of alloy 718 journal, February 2004

Model based gap and melt rate control for VAR of Ti-6Al-4V journal, December 2004

Model-based melt rate control during vacuum arc remelting of alloy 718
journal, February 2004

Model based gap and melt rate control for VAR of Ti-6Al-4V
journal, December 2004