Compound interaction/induction electric rotating machine

A dynamoelectric machine comprising:

• a frame;
• a rotatable shaft supported by said frame;
• a cylindrical rotor mounted coaxially on said shaft, said cylindrical rotor defining two axial end surfaces each substantially in a plane normal to said shaft and a cylindrical circumferential surface coaxial with said shaft between said axial end surfaces, said rotor being provided with a plurality of rotor coil winding grooves which are generally parallel to said shaft and substantially uniformly spaced from each other about said circumferential surface;
• a distributed armature winding having axial portions parallel to said shaft and received within said rotor grooves and radial portions in the region of said end surfaces and extending between substantially diametrically opposite grooves with respect to said shaft;
• and
• magnetic field producing means mounted on said frame for producing a first magnetic field directed to interact with said winding axial portions and second magnetic fields, in the region of at least one axial end surface of said rotor, which are directed to interact with the respective winding radial portions, said winding radial portions at each axial end surface of said rotor creating a build-up of overlapping windings which is minimum at said circumferential surface and gradually increases to a maximum in the region of said shaft, said build-up generally defining a conical convex surface, and said magnetic field producing means being configurated to generally conform to said circumferential and conical concave surfaces to thereby minimize the air gaps between said magnetic field producing means and said winding portions and optimize the coupling between the magnetic fields of said windings.