(ETA. counterclockwise synch is interesting and also easily replicable, at least in diametrically magnetised rotors, Again though, if this is an axially polarised levitation then this too is anomolous. Have to say, everything's pointing to diametric polarisation - alternatig fields, so Earnshaw doesn't apply, but the combination of levitation and counter-rotation is still cool.. would make for a neat executive toy..)
On Wed, Mar 23, 2016 at 12:02 AM, Vibrator ! <[email protected]> wrote: > What are the relative polarities - are they axially or diametrically > polarised (poles on opposite faces or same face)? > > Assuming axial magnetisation and that both are common permanent magnets, > the floating weight is levitated by reuplsion in apparent defiance of > Earnshaw's theorem (since, per Faraday's paradox, the fields themselves are > effectively stationary). > > If OTOH one or both magnets are diamterically (or otherwise off-axially) > polarised, then we have an alternating field and Earnshaw doesn't apply. > > > If the former case is true, then are the magents a solid alloy type, or > sintered (ie. soft ferromagnets and NdFeB are usually sintered, the latter > in a chromed jacket)? Since this may influence the types of EMFs that > could be generated. > > Earnshaw also specifically applies to ferromagnetic (ie dipolar) > interacatons - if the system is complicated by paramagnetic or diamagnetic > materials, stable levitation is not precluded. > > More info would be interesting! > > On Tue, Mar 22, 2016 at 10:03 PM, H Ucar <[email protected]> wrote: > >> That is while the base magnet attached to motor in a vertical axis >> spinning clockwise, the floating magnet in air keeps spinning counter >> clockwise in phase locked mode 1 cm above the base magnet. In order to >> obtain this mode the floating magnet is initially forced to spin counter >> wise using air jet. Once it gains enough speed it continues to spin by >> itself by the 'negative' torque from the base magnet. >> >> Note that the floating magnet spin axis have small angular oscillation >> locked to base magnet spin too. >> >> >> >
