Counter-rotatable generator
A counter-rotatable generator includes a generator stator concentric with concentric counter-rotatable radially inner pole and outer magnet rotors. The magnet rotor encircles the pole rotor and the pole rotor encircles the generator stator. A rotor air gap is disposed between the magnet and pole rotors, and a transformer air gap is disposed between the pole rotor and the stator. The magnet rotor includes a circular array of magnets having circumferentially alternating north/south and south/north orientations, retained within a magnet retention ring, and the magnets are circumferentially separated from each other by non-magnetic material spacers. One stator includes an annular hub, axial windings around equi-distantly spaced axial poles on the annular hub, radial cores extending radially outwardly from and equi-angularly spaced about a pole hub on the annular hub between the first and second axial windings, and radial windings around the radial cores.
1. A counter-rotatable generator comprising:
a generator stator,
counter-rotatable radially inner pole and outer magnet rotors, and
the radially outer magnet rotor, the radially inner pole rotor, and the generator stator being concentric.
2. A counter-rotatable generator as claimed in claim 1 , further comprising:
the radially outer magnet rotor encircling the radially inner pole rotor,
the radially inner pole rotor encircling the generator stator,
a rotor air gap between the magnet and pole rotors, and
a transformer air gap between the pole rotor and the stator.
3. A counter-rotatable generator as claimed in claim 2 , further comprising:
the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations,
the circular array of magnets retained within a magnet retention ring, and
the magnets circumferentially separated from each other by non-magnetic material spacers.
4. A counter-rotatable generator as claimed in claim 2 , further comprising:
the pole rotor including one or more pole assemblies having one or more pole hubs supporting one or more sets of axially extending rotatable bar poles respectively,
each of the bar poles including an axially extending outer bar connected to a respective one of the pole hubs by a connector extends radially outwardly from the respective one of the pole hubs to the outer bar, and
non-magnetic material disposed axially and radially between the pole assemblies.
5. A counter-rotatable generator as claimed in claim 4 , further comprising the non-magnetic material in an arbor disposed axially and radially between the pole assemblies.
6. A counter-rotatable generator as claimed in claim 5 , further comprising:
the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations,
the circular array of magnets retained within a magnet retention ring, and
the magnets circumferentially separated from each other by non-magnetic material spacers.
7. A counter-rotatable generator as claimed in claim 6 , further comprising the pole hubs and the bar poles being made of a magnetic steel.
8. A counter-rotatable generator as claimed in claim 2 , further comprising:
the stator including a stator cylindrical shaft or annular hub with axially adjacent radial and axial poles,
the axial poles including one or more axial windings wound around axial cores of annular axial poles on the shaft or the annular hub,
each of the radial poles including radial windings wound around radial cores extending radially outwardly from a cylindrical or annular pole hub on the stator cylindrical shaft or the annular hub, and
the radial cores equi-angularly spaced about the pole hub.
9. A counter-rotatable generator as claimed in claim 8 , further comprising pole rims circumscribing and supported by the radial cores.
10. A counter-rotatable generator as claimed in claim 8 , further comprising the non-magnetic material in an arbor disposed axially and radially between the pole assemblies.
11. A counter-rotatable generator as claimed in claim 8 , further comprising the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations.
12. A counter-rotatable generator as claimed in claim 11 , further comprising:
the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations,
the circular array of magnets retained within a magnet retention ring, and
the magnets circumferentially separated from each other by non-magnetic material spacers.
13. A counter-rotatable generator as claimed in claim 8 , further comprising:
the stator including a stator cylindrical shaft or annular hub,
axial windings wound around annular axial poles evenly distributed or equi-distantly spaced on the shaft or the annular hub,
radial cores extending radially outwardly from a generally cylindrical or annular pole hub axially centered on the stator cylindrical shaft or the annular hub between the first and second axial windings,
the radial cores equi-angularly spaced about the pole hub, and
radial windings wound around the radial cores.
14. A counter-rotatable generator as claimed in claim 13 , further comprising pole rims circumscribing and supported by the radial cores.
15. A counter-rotatable generator as claimed in claim 13 , further comprising the non-magnetic material in an arbor disposed axially and radially between the pole assemblies.
16. A counter-rotatable generator as claimed in claim 13 , further comprising the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations.
17. A counter-rotatable generator as claimed in claim 16 , further comprising:
the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations,
the circular array of magnets retained within a magnet retention ring, and
the magnets circumferentially separated from each other by non-magnetic material spacers.
18. A counter-rotatable generator as claimed in claim 2 , further comprising the counter-rotatable generator being an alternator having a single axial winding between two stator pole ends located at opposite ends of the shaft or hub.
19. A counter-rotatable generator as claimed in claim 18 , further comprising:
the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations,
the circular array of magnets retained within a magnet retention ring, and
the magnets circumferentially separated from each other by non-magnetic material spacers.
20. A counter-rotatable generator as claimed in claim 19 , further comprising the non-magnetic material in an arbor disposed axially and radially between the pole assemblies.
21. A counter-rotatable generator as claimed in claim 20 , further comprising the magnet rotor including a circular array of magnets having circumferentially alternating north/south and south/north orientations.
22. A counter-rotatable generator as claimed in claim 2 , further comprising:
the stator including a stator cylindrical shaft or annular hub with axially adjacent stator poles having Delta-connected and/or Y-connected stationary windings.
23. A counter-rotatable generator as claimed in claim 22 , further comprising:
the stator being Y-connected,
the counter-rotatable generator being multi-phase with an N number of phases,
the stator cylindrical shaft or annular hub having the same N number of the Y-connected stationary windings, and,
all the Y-connected stationary windings being radial windings.
24. A counter-rotatable generator as claimed in claim 22 , further comprising:
the stator being Y-connected,
the counter-rotatable generator being multi-phase with an N number of phases,
the stator cylindrical shaft or annular hub having the same N number of the Y-connected stationary windings, and
Y-connected stationary axial end windings at opposite ends of the shaft or annular hub,
and all the Y-connected stationary windings between the axial end windings being radial windings.
25. A counter-rotatable generator as claimed in claim 22 , further comprising:
the stator being Delta-connected,
the counter-rotatable generator being multi-phase with an N number of phases,
the stator cylindrical shaft or annular hub having N+1 number of the stator poles with the same N+1 number of the Delta-connected stationary windings, and
all the Delta-connected stationary windings being axial windings.
26. A counter-rotatable generator as claimed in claim 22 , further comprising:
the stator being Delta-connected,
the counter-rotatable generator being multi-phase with an N number of phases,
the stator cylindrical shaft or annular hub having N+1 number of the stator poles with the same N+1 number of the Delta-connected stationary windings, and
Delta-connected stationary radial end windings at opposite ends of the shaft or annular hub,
and all the Delta-connected stationary windings between the axial end windings being axial windings.