<p>The present invention relates to cylindrical rotating electric machines which comprise armature and field source, with either the field source or the dual armature being the rotating component. The dual armature is composed of two concentric cylindrical sets of coils with the field source situated in the gap between the inner and outer armature sections. Relative rotational motion between the field source and armature coils can be achieved by having either one be the rotor. By using two armature coil sections, one inside the field source aperture and the other external to the field source, the flux linkage between the armature and field source can be approximately doubled. The increased flux linkage in the invented technology produces a substantially higher power density than can be obtained with conventional machine technology.</p>
