8
High-Speed Maglev Transport
8.1 Electromagnetic and Electrodynamic Levitation
Magnetic levitation (maglev) can provide a super high-speed ground transport with a nonadhesive drive system that is independent of frictional forces between the guideway (track) and vehicle bogies. Maglev trains, a combination of contactless magnetic suspension and linear motor technology, realizes super-high-speed running, safety, reliability, low environmental impact, and minimum maintenance. Two maglev transportation technologies emerged in the early 1970s: electromagnetic (EML) levitation, which utilizes attractive forces of electromagnets with controlled air gap, and electrodynamic (EDL) levitation, which utilizes repulsive forces and superconductivity.
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