Patent ID: 7898134
Filing Date: 2011-03-01
Classification: H02K,Y02T

Abstract:
1. A brushless disk DC motor/generator comprising: a stationary, circular, non-ferrous stator plate having an inwardly-facing surface and an outwardly-facing surface and having a central circular opening therein; a circular stator hub having a central circular opening therein and having a stator end of reduced diameter, said stator end of said stator hub being positioned within said central circular opening in said stator plate, said stator hub being fixedly mounted to said stator plate, said stator hub being adapted for mounting to an external structure; a stator bearing having an outer cylindrical member fixedly positioned within said central circular opening in said stator hub, said stator bearing having an inner cylindrical member adapted for rotation with respect to said outer cylindrical member, said inner cylindrical member having a central circular opening therein; a plurality of electromagnet assemblies mounted to said inwardly-facing surface of said stator plate to form a circular ring of said electromagnet assemblies, a pair of free ends of a copper winding of each of said electromagnet assemblies exiting each of said electromagnet assemblies for routing and connection to effect a desired interconnection configuration of said plurality of electromagnet assemblies and to provide connection of said plurality of electromagnet assemblies to an external power controller; an inner cylindrical ferrous rotor bowl having an inwardly-facing open end and an outwardly-facing flat closed end, said closed end of said inner rotor bowl having a central circular opening therein, said inner rotor bowl having a plurality of outwardly-facing permanent magnets mounted to form an inner circular ring of permanent magnets on an outer cylindrical surface thereof; an outer cylindrical ferrous rotor bowl having an inwardly-facing open end and an outwardly-facing closed end, said closed end of said outer rotor bowl having a central circular opening therein, said outer cylindrical rotor bowl having a diameter greater than the diameter of said inner cylindrical rotor bowl and a length equal to the length of said inner cylindrical rotor bowl, said outer cylindrical rotor bowl having a plurality of inwardly-facing permanent magnets mounted to form an outer circular ring of permanent magnets on an inner cylindrical surface thereof, said outer circular ring of permanent magnets being axially and diametrically aligned with and equal in number to said plurality of permanent magnets forming said inner circular ring of permanent magnets; and a cylindrical drive hub positioned within said inner rotor bowl in axial alignment with said stator plate, said stator hub, and said inner and outer rotor bowls, said drive hub having a circular mounting flange, said inner and outer rotor bowls being fixedly connected to said circular mounting flange for rotation in concert therewith, said inner and outer rotor bowls being concentrically positioned such that said inner and outer circular rings of permanent magnets mounted thereon are axially and diametrically aligned with said circular ring of electromagnet assemblies on said stator plate, such that said inner circular ring of permanent magnets rotates in close proximity to and inside said circular ring of electromagnet assemblies, and such that said outer circular ring of permanent magnets rotates in close proximity to and outside said circular ring of electromagnet assemblies, said drive hub having a central opening therein for receiving an external drive shaft, a stator end of said drive hub being fixedly positioned within said inner cylindrical member of said stator bearing, a rotor end of said drive hub extending through said central openings in said inner and outer rotor bowls.