NDLI: Mechanical Loss and Bobbin Material in Double Pancake AC Superconducting Coils

Content Provider	IEEE Xplore Digital Library
Author	Takao, T. Nishimura, K. Sakai, S. Takagi, T. Sakamoto, O. Goto, T. Fukui, S. Yamanaka, A.
Copyright Year	2002
Abstract	We fabricated nonimpregnated HTS superconducting coils with a BSCCO tape. Bobbin materials in the coils are a Dyneema(R) fiber reinforced plastic (DFRP) and a glass fiber reinforced plastic (GFRP). We excited those coils with ac currents, and estimated mechanical losses. According to the measured data, the mechanical loss decreased with increase of winding tension of the coils, because strong winding tension fixed the coils tightly. Also, the mechanical loss occurred in the DFRP coil was smaller than that occurred in the GFRP coil. A thermal expansion coefficient of the DFRP is a negative value, that is, the DFRP expands with cooling down from room temperature to cryogenic temperature. The expansion of the DFRP bobbin made the winding of the coil fix tightly, and the mechanical loss decreased. From those experimental results, we think that the DFRP bobbin is useful for decreasing of mechanical losses of the ac coils.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	4602404
Ending Page	4602404
Page Count	1
File Size	355949
File Format	PDF
ISSN	10518223
Volume Number	23
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Coils Windings Materials Current measurement Loss measurement Integrated circuits Magnetic fields pancake coil AC loss bobbin mechanical loss
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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