NDLI: Optimization of the Stress Distribution of Helical Coils With a Cable-in-Conduit Configuration

Content Provider	IEEE Xplore Digital Library
Author	Habuchi, T. Tsutsui, H. Tsuji-Iio, S. Shimada, R.
Copyright Year	2002
Abstract	Virial-limit coils for application to magnetic confinement nuclear fusion devices are hybrid helical coils that level electromagnetic stresses. In past research, a possibility that a large bending stress is caused in helical coils made of a cable-in-conduit configuration (CICC) was pointed out. In this paper, we analytically evaluated the stresses of helical coils made of CICC by modeling them as springs and calculated a detailed stress distribution by finite-element method (FEM) analysis. FEM results show that the bending and torsional stresses, which are ten times or more as large as the membrane stress, are caused. These stresses are caused by the moment of electromagnetic forces, which can be explained by modeling helical coils as coil springs. We propose a helical coil that lessens the moment and confirms the effect of the reduced moment, and the coil under this optimal condition of moment reduction is termed a moment-free coil.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	3494
Ending Page	3500
Page Count	7
File Size	656453
File Format	PDF
ISSN	10518223
Volume Number	21
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stress Coils Magnetomechanical effects Toroidal magnetic fields Springs Conductors Electromagnetic forces virial-limit coil (VLC) Bending and torsional stresses electromagnetic force finite-element method (FEM) magnet confinement device
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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