July 2023
Intermediate to advanced
736 pages
21h 18m
English
Content preview from Linear Electric Machines, Drives, and MAGLEVs Handbook, 2nd Edition
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20 Attraction Force (Electromagnetic) Levitation Systems
Attraction levitation systems (ALS) use attraction current-controlled electromagnetic force to control the airgap between fix and mobile mild magnetic cores. Applications for ALS range from magnetic bearings and vibrating tables to magnetically levitated vehicles (MAGLEVs) [1, 2, 3].
For MAGLEVs, the primary is placed on board and contains no permanent magnet (PM-less) or PM-assisted dc-controlled current electromagnets (solenoids) and a solid mild iron fix secondary (track).
On the other hand, for active magnetic bearings and for vibrating tables, the secondary is the mover and is made, in general, from a laminated mild steel core or of a soft magnetic ...
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