Patent ID: 7888839

Claim:
A motor-generator for converting between electrical and rotary mechanical energy comprising: a rotor that rotates about an axis of rotation and is constructed of two spaced apart co-rotating rotor portions having magnetic poles that drive magnetic flux across an armature airgap formed therebetween; an armature that magnetically interacts with said rotor, said armature being located in said armature airgap and having a substantially nonmagnetic and low electrical conductivity form, and wire windings that are wound onto said form; said form having a free end that extends inside said rotor and a support end that attaches to the stationary portion of said motor-generator; said form is constructed with a thin backing portion and thicker raised portions extending from said backing portion in the direction of said magnetic flux; said wire windings comprising multiple individually insulated conductor wire inserted to lie in spaces between said raised portions, wherein the conductors of a single wire are electrically connected together in parallel and electrically insulated between each other along their length inside said armature airgap; wherein said form provides position location and support for said wire windings during the winding process, and subsequent reaction of electromagnetically induced torque on said windings to said stationary portion of said motor-generator through said support end of said form, and prevents said windings from contacting said rotor portions during rotation of said rotor.