Electromagnetic suspension
Electromagnetic suspension (EMS) is the magnetic levitation of an object achieved by constantly altering the strength of a magnetic field produced by electromagnets using a feedback loop. In most cases the levitation effect is mostly due to permanent magnets as they have no power dissipation, with electromagnets only used to stabilise the effect.
Floating globe. Magnetic levitation with a feedback loop.
The Transrapid system uses servomechanisms to pull the train up from underneath the track and maintains a constant gap while traveling at high speed
Maglev is a system of rail transport whose rolling stock is levitated by electromagnets rather than rolled on wheels, eliminating rolling resistance.
Transrapid 09 at the Emsland test facility in Lower Saxony, Germany
Example of low-speed urban maglev system, Linimo
The Birmingham International Maglev shuttle
Transrapid at the Emsland test facility