Patent ID: 6054789
Filing Date: 2000-04-25
Classification: H02K

Abstract:
A permanent magnet electric device comprising:a plurality of permanent magnet sections, said plurality of permanent magnet sections forming a cylinder having a longitudinal axis and a longitudinal bore, each of said plurality of permanent magnet sections having a magnetic orientation and arranged to form a magic ring;a core made of a passive magnetic material, said core being rotatable and free to rotate within the longitudinal bore relative to the cylinder formed by said plurality of permanent magnet sections;a plurality of copper wires longitudinally embedded in said core forming windings;said magnetic orientation given by the formula:.gamma.=2.theta.where said .gamma. is equal to a variation in magnetization direction and said .theta. is equal to an angle progressing around said longitudinal axis;device having a uniformly distributed magnetic flux;a commutator coupled to said plurality of copper wires;a controller coupled to said commutator; anda current source coupled to said controller;whereby when an electric current is caused to travel within said plurality of copper wires an induced field interacts with the magnetic field created by said plurality of permanent magnet sections causing said core to rotate relative to said plurality of permanent magnet sections.