An Analysis of Force-Reduced Toroidal Magnets

J. L. Hill, B. C. Amm, J. Schwartz

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


Superconductors alleviate the problem of Joule losses in electromagnetic devices, but an upper limit on large-scale electromagnets remains the difficulty in supporting the Lorentz forces within such a magnet. The problem is magnified if the materials are brittle, such as a ceramic superconductor. Recently, we discussed a possible solution to this problem: electromagnets with a force-reduced winding. Producing such a phenomenon may greatly reduce the size and support needed. Force-free finite geometries are not possible due to the limits of the Virial theorem, but present-day magnet support masses are up to an order of magnitude greater than the Virial limit. Here we present results from finite element calculations indicating that this design offers substantial improvement over conventional approaches.

Original languageEnglish (US)
Pages (from-to)2094-2097
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number4
StatePublished - Jul 1994

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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