6 Transportation (Medium- and High-Speed) SLIM Design
6.1 Introduction
We define transportation as urban and interurban public people or freight movers with vehicle suspension on wheels or via MAGLEVs.
The main difference between magnetic and wheel suspension of people movers from the SLIM design point of view is the treatment of net normal force Fn.
As shown in Chapter 3, Fn is reasonably low (three times rated propulsion force in aluminum-on-iron SLIMs) if the efficiency is the main target of the design. Fn switches from repulsion to attraction force as the slip (secondary) frequency decreases; the switching point condition, however, corresponds to a rather large slip frequency (Chapter 3), which may not be acceptable as it produces high ...
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