Homopolar motor-generator

1. A homopolar motor-generator comprising:

a core assembly including a motor-generator stator;

a plurality of stator rings arranged about a central axis;

armature coils interengaging slots of the stator rings;

one or more field coils, each coil encircling the central axis;

a motor-generator rotor encircling the stator;

the motor-generator rotor including a plurality of rotor segments; each rotor segment separated from the other rotor segments by non-magnetic material and,

rotor segment lamellae that are stacked to form the rotor segments wherein each rotor segment lamella includes a curved central portion between uncurved projections, the curved central portion for following a contour of the motor-generator rotor.

2. A homopolar motor-generator comprising:

a cylindrical rotor that encircles a motor-generator stator;

the stator including field coils and armature coils;

the rotor including a plurality of rotor segments;

each rotor segment having a side iron interconnecting a magnetic one-half North pole and a magnetic one-half South pole;

the rotor segment one-half poles extend from opposite sides of the side iron; and,

rotor segment lamellae that are stacked to form the rotor segment;

wherein each rotor segment lamella includes a curved central portion between uncurved projections, the curved central portion for following a contour of the motor-generator rotor.

3. The homopolar motor of claim 2 wherein the rotor segment lamella are cut from sheet stock and the uncurved projections are bent in opposite directions to form a lamella.

4. A homopolar motor-generator comprising:

a cylindrical multipart rotor including rotor setments, the rotor encircling an “n” pole stator;

the stator having a central axis and stator field windings encircling the central axis;

the n poles of the stator defining n stator channels;

a set of armature coils associated with each stator channel, each set of armature coils configured for bidirectionally exchanging electric power with a respective AC to DC power converter in an n-channel power supply; and,

the rotor including rotor segment lamellae that are stacked to form rotor segments wherein each rotor segment lamella includes a curved central portion between uncurved projections, the curved central portion for following a contour of the motor-generator rotor.

5. A homopolar motor-generator machine comprising:

a core assembly arranged about a central axis;

the core assembly including a motor-generator stator;

stator rims axially spaced along the central axis and lying in planes perpendicular to the central axis;

one or more stator field coils, each coil encircling the central axis;

plural armature coil ways;

each way extending from rim to rim via stator rim slots;

a motor-generator rotor encircling the stator;

the motor-generator rotor including a plurality of rotor segments;

each rotor segment for completing a magnetic circuit between different stator rims: and,

rotor segment lamellae that are stacked to form the rotor segments wherein each rotor segment lamella includes a curved central portion between uncurved projections, the curved central portion for following a contour of the motor-generator rotor.

6. The machine of claim 5 further comprising:

rotor segment one-half poles and wherein the magnetic circuits do not include a permanent magnet.

7. The machine of claim 5 wherein the rotor is a backiron free rotor.

8. A homopolar motor-generator machine comprising:

a cylindrical rotor that defines an axis of revolution;

a motor-generator stator encircled by the rotor;

the stator including field coils arranged perpendicular to the axis of revolution;

the stator including armature coils arranged parallel to the axis of revolution;

the rotor including a plurality of rotor segments;

each rotor segment having a side iron interconnecting a magnetic one-half North pole and a magnetic one-half South pole; and,

rotor segment lamellae that are stacked to form the rotor segment wherein each rotor segment lamella includes a curved central portion between uncurved projections, the curved central portion for following a contour of the motor-generator rotor.

9. The machine of claim 8 further comprising:

within the rotor, rotor segment magnetic isolation material separating rotor segments.

10. The machine of claim 8 wherein the rotor is a backiron free rotor.

11. The machine of claim 8 further comprising:

one or more of the rotor segments shaped to complete respective magnetic circuits between stator rims spaced along the axis of revolution; and,

the magnetic circuits excluding permanent magnets.

12. A homopolar motor-generator machine comprising:

a cylindrical multipart rotor including rotor segments, the rotor encircling an “n” pole stator;

the stator having a central axis and one or more stator field windings;

each stator field winding encircling a field region of the central axis;

the n poles of the stator defining n stator channels;

sets of armature coils associated with each stator channel;

each armature coil extending over a central axis field region and each set of armature coils configured for bidirectionally exchanging electric power with a respective AC to DC power converter in an n-channel power supply; and,

rotor segment lamellae that are stacked to form the rotor segments wherein each rotor segment lamella includes a curved central portion between uncurved projections, the curved central portion for following a contour of the motor-generator rotor.

13. The machine of claim 12 further comprising:

within the rotor, rotor segment magnetic isolation material separating rotor segments.

14. The machine of claim 12 wherein the rotor is a backiron free rotor.

15. The machine of claim 12 further comprising:

respective rotor segment magnetic circuits including adjacent stator rims wherein the magnetic circuits exclude permanent magnets.