Patent ID: 7242122

Claim:
A low speed discoidal electric motor useful for avoiding a flip-flop effect and vibrations, the motor comprising: a rotor; and a stator wherein said rotor comprises: a pair of rotor disks, a wheel rim, a carrier, a plurality of permanent magnets, a plurality of bearing bushings, and a plurality of ball bearings; wherein said pair of rotor disks includes a circumferential part mechanically connected to said wheel rim and a side surface of a near-centre part mechanically connected to said plurality of bearing bushings, said wheel rim being mechanically connected at an inner surface thereof to an outer surface of said carrier, wherein said carrier is mechanically connected at an annular undersurface thereof to an outer surface of said plurality of permanent magnets; wherein said plurality of bearing bushings are disposed on and rotatably connected to said plurality of bearings; and wherein said stator comprises: a pair of stator disks, a fixing hub having a radially projecting part, a plurality of shanks, a plurality of spokes having grooves, a plurality of segments, a plurality of stator coils, a plurality of lead-in wires, and a plurality of position indicators; wherein said pair of stator disks includes a near-centre part having a side surface mechanically connected to a side surface of the radially projecting part of said fixing hub, and mechanically and fixedly connected at a side surface of a near-circumference part of the stator disks to said plurality of shanks, said plurality of shanks being mechanically connected at an outer surface thereof to said plurality of spokes; wherein said plurality of position indicators are mechanically connected to said plurality of shanks; wherein said plurality of segments have longitudinal axes forming arcs of circle, all said arcs having the same radius, said segments stably set into corresponding grooves of said plurality of spokes such that a uniform air-gap is defined between inner surfaces of said plurality of permanent magnets and corresponding outer surfaces of said plurality of segments in any position of said stator relative to said rotor; wherein each coil of said plurality of stator coils is wound and mounted on a respective segment of said plurality of segments; wherein said plurality of bearings are sandwichingly disposed between said plurality of bearing bushings and said fixing hub; and wherein each coil of said plurality of stator coils is configured and arranged to be fed with electric current with a respective wire of said plurality of lead-in wires.