NDLI: Eddy current heating in micro-SMES bus-bars

Content Provider	IEEE Xplore Digital Library
Author	Pfotenhauer, J.M. Blanchard, J.P. Martin, C.J.
Copyright Year	2002
Abstract	Results from numerical models and theoretical analyses are presented that describe the development of eddy current heating in copper bus bars, both with and without superconducting elements, in response to the rapid decay of current in a nearby superconducting magnet such as in micro-SMES systems. The analysis differs from those available in the open literature in that the change of magnetic field is neither instantaneous, nor sinusoidal. We especially investigate eddy current heating in the regime where the field decay time is on the order of the current diffusion time constant. It is found that the self-inductance of the copper bus bar contributes significantly to the time dependent heat generation. Analytical results are compared to experimental data in the form of subsequent temperature excursions of a liquid helium cooled copper bus, in response to field ramp rates on the order of 1.5 tesla/second.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1939
Ending Page	1942
Page Count	4
File Size	471044
File Format	PDF
ISSN	10518223
Volume Number	15
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Eddy currents Heating Magnetic analysis Copper Superconducting magnets Numerical models Bars Magnetic fields Temperature transient film boiling Bus bars eddy current heating micro-SMES
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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