It’s fussy to adjust, but once it’s stable, the only friction in the system should be the drag caused by air in the bell jar. The diamagnetic material hovers above a rare-earth ring magnet, supporting a slender vertical shaft that holds the rotor and another magnetic bearing at the top. The difference here is that rather than low-friction sapphire bearings, this motor uses zero-friction magnetic levitation using pyrolyzed graphite discs. The coils, scavenged from those dancing flowerpot solar ornaments, are briefly energized by the rotor passing over a reed switch, giving the rotor a little boost. The design is an extension of ’s “EZ-Spin” motor, which we’ve featured before, and has the same basic layout – a ring of coils wired in series forms the stator, while a disc bearing permanent magnets forms the rotor. It’s not a motor that can do any useful work, spinning at a stately pace beneath its bell-jar enclosure as it does. The motor that presents in the video below is unconventional, to say the least. And while this magnetic levitation motor does not break the laws of thermodynamics, it can be considered a perpetual motion machine, at least for certain values of perpetuity. We see our share of pitches for perpetual motion machines in the Hackaday tips line, and we generally ignore them and move along.
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