Demagnetization using a determined estimated magnetic state
Abstract
A method for demagnetizing comprising positioning a core within the electromagnetic field generated by a first winding until the generated first electrical current is not substantially increasing, thereby determining a saturation current. A second voltage, having the opposite polarity, is then applied across the first winding until the generated second electrical current is approximately equal to the magnitude of the determined saturation current. The maximum magnetic flux within the core is then determined using the voltage across said first winding and the second current. A third voltage, having the opposite polarity, is then applied across the first winding until the core has a magnetic flux equal to approximately half of the determined maximum magnetic flux within the core.
- Inventors:
- Issue Date:
- Research Org.:
- Bonneville Power Administration, Portland, OR (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1167201
- Patent Number(s):
- 8934210
- Application Number:
- 13/535,637
- Assignee:
- U.S. Department of Energy (Washington, DC)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2012 Jun 28
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Citation Formats
Denis, Ronald J, and Makowski, Nathanael J. Demagnetization using a determined estimated magnetic state. United States: N. p., 2015.
Web.
Denis, Ronald J, & Makowski, Nathanael J. Demagnetization using a determined estimated magnetic state. United States.
Denis, Ronald J, and Makowski, Nathanael J. Tue .
"Demagnetization using a determined estimated magnetic state". United States. https://www.osti.gov/servlets/purl/1167201.
@article{osti_1167201,
title = {Demagnetization using a determined estimated magnetic state},
author = {Denis, Ronald J and Makowski, Nathanael J},
abstractNote = {A method for demagnetizing comprising positioning a core within the electromagnetic field generated by a first winding until the generated first electrical current is not substantially increasing, thereby determining a saturation current. A second voltage, having the opposite polarity, is then applied across the first winding until the generated second electrical current is approximately equal to the magnitude of the determined saturation current. The maximum magnetic flux within the core is then determined using the voltage across said first winding and the second current. A third voltage, having the opposite polarity, is then applied across the first winding until the core has a magnetic flux equal to approximately half of the determined maximum magnetic flux within the core.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 13 00:00:00 EST 2015},
month = {Tue Jan 13 00:00:00 EST 2015}
}
Works referenced in this record:
Method and apparatus for magnetizing and demagnetizing current transformers and magnetic bodies
patent, December 2000
- Edel, Thomas G.
- US Patent Document 6,160,697
Method and apparatus for accurate measurement of pulsed electric currents utilizing ordinary current transformers
patent, November 2002
- Edel, Thomas G.
- US Patent Document 6,479,976
Method and apparatus for controlling the magnetization of current transformers and other magnetic bodies
patent, February 2003
- Edel, Thomas G.
- US Patent Document 6,522,517