Patent ID: 8106563

Claim:
An electric device, comprising: a drive shaft; a rotor rotatable with said drive shaft, said rotor comprising a first array of circumferentially spaced magnets coupled to a first side of said rotor; a stator comprising circumferentially spaced electrically conductive coils coupled to a first side of said stator, said drive shaft passing through said stator, said first side of said stator being adjacent to said first side of said rotor and said rotor and said stator provided in substantially parallel planes; wherein one of said rotor and said stator is plate-shaped and includes a second side opposite said first side and a circumferential edge to comprise one of: a second array of circumferentially spaced magnets coupled to a second side of said rotor and circumferentially spaced electrically conductive coils coupled to a second side of said stator, wherein each of said electrically conductive coils coupled to said first side of said stator is spaced radially with respect to said magnets on said rotor, and is wrapped around a radial core extending outward in a radial direction with respect to said drive shaft.