Anti-gearwise spin locking of a trapped magnet assembly (20160324 124137)

Unique anti-gearwise¹ and locked² spin of the floating magnet assembly (FM) under a bound state with a rotating dipole magnet Apparently there is a negative torque between driving magnet (DM) and FM, responsible for keep spinning the FM in opposite direction almost in the same axis. As the negative torque is in conflict with conservation of energy, this might be explained by the coupling of magnetic fields by opposite sides of magnets resulting a curious crossing topology of field lines. Whatever the reason, experiment shows FM can lock to DM spin1111 while spinning in opposite direction. Driver magnet assembly rotates at 5525 RPM CCW and consists of a ⌀30x5 mm disk dipole magnet mounted in a cylindrical housing made of polyoxymethylene (POM) , poles looking to sides, slightly tilted from radial plane. FM assembly consists of magnet stack of two cylinder of ⌀10×10 mm and a square form of 10×10×3 mm in between, dipoles aligned and spinning clockwise. A thread piece is used to test spin directions of magnets. FM is initially speed up in this direction using an compessed air jet to a certain speed then it get locked to DM rotation in opposite direction. A third magnet assembly overhead helps to keep the floating magnet orientation upward and contribute to stability. All magnets are NdFeB/N35 type and magnetized in thickness. In later tests in similar setups it is observed the angular oscillation pattern of FM have elongated circular shape this typically different from patterns belong to normal spinning magnets. Credits: H. Ucar (https://orcid.org/0000-0003-4471-3590) Research paper: https://doi.org/10.3390/sym13030442 Research home:   / sudanamaru1   (1)Term "anti-gearwise" specify a rotation in the opposite direction of the direction that one expect from a radial gear coupling. (2) Term "locked" is used to describe the spin rate of floating magnet is fixed to a integer ratio of driver magnet spin velocity where it meets a potential well which prevent accelerate or decelerate further by interacting with rotating field.