Abstract
A mathematical analysis of ``permanent'' magnet suspension systems as related to high-speed ground transportation has been calculated for a ceramic magnet roadbed-ceramic magnet vehicle system as well as a ceramic magnet roadbed-superconducting magnet vehicle system. The approximation of the ceramic magnet by a current sheet around the magnet makes it possible to investigate the performance of a magnetic suspension system in terms of lift force as a function of magnet separation and thickness. For each of these an optimum width is found beyond which the net lift force is reduced. Calculations are also made assuming a higher-density current sheet for the vehicle magnet, i.e., a superconducting magnet, and similar results are also obtained. Finally, these two systems along with the magnetic induction system utilizing a diamagnetic conducting roadbed, are compared in their performance, i.e., lift force, ground clearance, magnet weight, and possible losses.
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