초록 ▼

Machines useful for wind turbine and ship propulsion purposes include a double-sided generator or motor with two concentric air gaps. In one embodiment, the machine includes a double-sided rotor with an inner rotor side and an outer rotor side; and a stator with an inner stator core and an outer sta

Machines useful for wind turbine and ship propulsion purposes include a double-sided generator or motor with two concentric air gaps. In one embodiment, the machine includes a double-sided rotor with an inner rotor side and an outer rotor side; and a stator with an inner stator core and an outer stator core, wherein the double-sided rotor is concentrically disposed between the inner stator core and the outer stator core.

대표청구항 ▼

What is claimed is: 1. A wind turbine generator, comprising: at least one double-sided rotor with an inner rotor side comprising at least one first permanent magnet and an outer rotor side comprising at least one second permanent magnet; and at least one stator with an inner stator core comprising

What is claimed is: 1. A wind turbine generator, comprising: at least one double-sided rotor with an inner rotor side comprising at least one first permanent magnet and an outer rotor side comprising at least one second permanent magnet; and at least one stator with an inner stator core comprising an inner stator winding and an outer stator core comprising an outer stator winding, wherein the at least one double-sided rotor is concentrically disposed between the inner stator core and the outer stator core of the wind turbine generator and wherein the inner stator core and the inner rotor side are located to oppose each other with a first air gap disposed therebetween and wherein the outer rotor side and the outer stator core are located to oppose each other with a second air gap disposed therebetween and further wherein the at least one double-sided rotor and at least one stator cooperate to produce at least 2.0 megawatts of power. 2. The wind turbine generator of claim 1 wherein the wind turbine generator comprises a direct-drive generator. 3. The wind turbine generator of claim 1 wherein the at least one first permanent magnet comprises a plurality of permanent magnets and the at least one second permanent magnet also comprises a plurality of permanent magnets. 4. The wind turbine generator of claim 1 wherein the at least one first permanent magnet and the at least one second permanent magnet each comprise permanent magnets respectively associated with the inner rotor side and the outer rotor side, wherein the permanent magnets are configured to be offset to reduce net torque pulsation. 5. The wind turbine generator of claim 1 wherein the at least one first permanent magnet and the at least one second permanent magnet each comprise permanent magnets respectively associated with the inner rotor side and the outer rotor side, wherein the permanent magnets are configured to be aligned. 6. The wind turbine generator of claim 1 wherein at least a portion of magnetic flux is shared between the at least two concentric generator rotor sides. 7. The wind turbine generator of claim 1 wherein the wind turbine generator is driven by a gearbox. 8. The wind turbine generator of claim 1 further comprising at least one cooling channel for cooling the inner stator core and the outer stator core. 9. The wind turbine generator of claim 8 wherein the at least one cooling channel uses wind for cooling the inner stator core and the outer stator core. 10. The wind turbine generator of claim 8 wherein the at least one cooling channel comprises a stator core support coupled to a stationary frame. 11. The wind turbine generator of claim of claim 8 wherein the at least one cooling channel comprises concentric rings of a metallic material. 12. The wind turbine generator of claim 11 further comprising angled fins disposed between the concentric rings. 13. The wind turbine generator of claim 8 wherein the at least one cooling channel uses liquid for cooling the inner stator core and the outer stator core. 14. The wind turbine generator of claim 1 further comprising: at least one heat pipe generally surrounding the inner stator core and the outer stator core; and at least one cooling channel disposed generally adjacent to the outer stator core, wherein the at least one heat pipe transfers heat from the inner stator core and the outer stator core to the at least one cooling channel. 15. A wind turbine comprising: a wind turbine generator comprising: at least one double-sided rotor with an inner rotor side comprising at least one first permanent magnet and an outer rotor side comprising at least one second permanent magnet; and at least one stator with an inner stator core comprising an inner stator winding and an outer stator core comprising an outer stator winding, wherein the at least one double-sided rotor is concentrically disposed between the inner stator core and the outer stator core of the wind turbine generator and wherein the inner stator core and the inner rotor side are located to oppose each other with a first air gap disposed therebetween and wherein the outer rotor side and the outer stator core are located to oppose each other with a second air gap disposed therebetween, and further wherein the wind turbine generator produces at least 2.0 megawatts of power. 16. The wind turbine of claim 15 wherein the wind turbine generator comprises a direct-drive generator. 17. The wind turbine of claim 16 wherein the at least one first permanent magnet comprises a plurality of permanent magnets and the at least one second permanent magnet also comprises a plurality of permanent magnets. 18. The wind turbine of claim 15 wherein the at least one stator of the generator is concentrically mounted within a stationary frame. 19. The wind turbine of claim 15 wherein the at least one first permanent magnet and the at least one second permanent magnet each comprise permanent magnets respectively associated with the inner rotor side and the outer rotor side, wherein the permanent magnets are configured to be offset to reduce net torque pulsation. 20. The wind turbine of claim 15 wherein the at least one first permanent magnet and the at least one second permanent magnet each comprise permanent magnets associated with the inner rotor side and the outer rotor side, wherein the permanent magnets are configured to be aligned. 21. The wind turbine of claim 15 wherein at least a portion of magnetic flux is shared between the at least two concentric generator rotor sides. 22. The wind turbine of claim 15 wherein the wind turbine generator is driven by a gearbox. 23. The wind turbine of claim 18 wherein the generator further comprises at least one cooling channel for cooling the inner stator core and the outer stator core. 24. The wind turbine of claim 23 wherein the at least one cooling channel uses wind for cooling the inner stator core and the outer stator core. 25. The wind turbine of claim of claim 23 wherein the at least one cooling channel comprises concentric rings of a metallic material. 26. The wind turbine of claim 25 further comprising angled fins disposed between the concentric rings. 27. The Find turbine of claim 23 wherein the at least one cooling channel uses liquid for cooling the inner stator core and the outer stator core. 28. The wind turbine of claim 15 wherein the generator further comprises: at least one heat pipe generally surrounding the inner stator core and the outer stator core; and at least one cooling channel disposed generally adjacent to the outer stator core, wherein the at least one heat pipe transfers heat from the inner stator core and the outer stator core to the at least one cooling channel.