Analysis of forcereduced toroidal magnets
Abstract
Superconductors alleviate the problem of Joule losses in electromagnetic devices, but an upper limit on largescale 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 forcereduced winding. Producing such a phenomenon may greatly reduce the size and support needed. Forcefree finite geometries are not possible due to the limits of the Virial theorem, but presentday 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.
 Publication:

IEEE Transactions on Magnetics
 Pub Date:
 July 1994
 DOI:
 10.1109/20.305682
 Bibcode:
 1994ITM....30.2094H
 Keywords:

 Design Analysis;
 Electromagnets;
 Lorentz Force;
 Superconducting Magnets;
 Wire Winding;
 Electric Current;
 Finite Element Method;
 Magnetic Fields;
 Superconductors (Materials);
 Virial Theorem;
 Electronics and Electrical Engineering