The paper derives and experimentally checks stability boundaries for a magnet levitating above a rotating magnet with copper-plate damping, showing that stable levitation requires a bounded window of spin speed and damping.
One method involves moving the floater vertically at constant speed and measuring the re- sulting damping force
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Stability of rotating magnetic levitation
The paper derives and experimentally checks stability boundaries for a magnet levitating above a rotating magnet with copper-plate damping, showing that stable levitation requires a bounded window of spin speed and damping.