Magnetic Levitation: Linear Synchronous Motor Efficiency

15 December 1972

journal article
Published by Canadian Science Publishing in Canadian Journal of Physics

Vol. 50 (24) , 3143-3146
https://doi.org/10.1139/p72-409

Abstract

Large gap linear synchronous motors suitable for magnetically levitated high speed guided ground transport are considered. It is shown that if a is the gap (suspension height) propulsion magnets have an optimum length of 1.5a and induce an almost sinusoidal wave form in the guideway coils. The efficiency is then η = 1/[1 + PR/E², cos² θ] where E is the induced voltage, P the power, R guideway resistance, and cos θ the ratio of average to peak power. A design example shows that high efficiency is possible even at a suspension height of 30 cm.

Keywords

MAGNETIC LEVITATION

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