Induction motor for use in drones
An induction motor may include a stator assembly and a rotor assembly that revolves or rotates around the state assembly. Additionally, a pole pitch of the induction motor may be less than two inches. The stator assembly may also optionally include a fractional slot winding.
1. An induction motor comprising:
a stator assembly comprising a plurality of circumferentially spaced conductive windings; and
a rotor assembly configured to rotate around the stator assembly, the rotor assembly comprising a plurality of circumferentially spaced conductive bars that interact with the plurality of windings to produce a magnetic field, wherein the stator assembly and the rotor assembly form an alternating current asynchronous induction motor, and
wherein the induction motor comprises a magnetic pole pitch within the gap between the stator assembly and the rotor assembly of less than two inches.
2. The induction motor of claim 1 , wherein the induction motor comprises a fractional slot winding.
3. The induction motor of claim 1 , wherein the plurality of windings are arranged in a distributed winding configuration.
4. The induction motor of claim 1 , wherein the plurality of windings are arranged in a wave winding configuration.
5. The induction motor of claim 1 , wherein the stator assembly further comprises a heat exchanger positioned between the plurality of windings.
6. The induction motor of claim 1 , wherein the induction motor comprises a magnetic pole pitch of less than 1.5 inches.
7. The induction motor of claim 1 , wherein the rotor assembly comprises a rotor frame and a rotor cage positioned within the rotor frame.
8. The induction motor of claim 1 , wherein the plurality of conductive bars comprise at least one bar having a teardrop cross-sectional shape.
9. The induction motor of claim 1 , wherein the induction motor comprises between four and twelve magnetic poles.
10. The induction motor of claim 9 , wherein the plurality of conductive bars comprises between three and seven conductive bars per magnetic pole.
11. An induction motor comprising:
a stator assembly comprising a plurality of circumferentially spaced conductive windings; and
a rotor assembly configured to rotate around the stator assembly, the rotor assembly comprising a plurality of circumferentially spaced conductive bars that interact with the plurality of windings to produce a magnetic field, wherein the stator assembly and the rotor assembly form an alternating current asynchronous induction motor, and
wherein the induction motor comprises a magnetic pole pitch within the gap between the stator assembly and the rotor assembly of less than two inches, and
wherein the motor comprises a fractional slot winding.
12. The induction motor of claim 11 , wherein the plurality of windings are arranged in a distributed winding configuration.
13. The induction motor of claim 11 , wherein the plurality of windings are arranged in a wave winding configuration.
14. The induction motor of claim 11 , wherein the stator assembly further comprises a heat exchanger positioned between the plurality of windings.
15. The induction motor of claim 11 , wherein the induction motor comprises a magnetic pole pitch of less than 1.5 inches.
16. The induction motor of claim 11 , wherein the rotor assembly comprises a rotor frame and a rotor cage positioned within the rotor frame.
17. The induction motor of claim 11 , wherein the plurality of conductive bars comprise at least one bar having a teardrop cross-sectional shape.
18. The induction motor of claim 11 , wherein the induction motor comprises between four and twelve magnetic poles.
19. The induction motor of claim 18 , wherein the plurality of conductive bars comprises between three and seven conductive bars per magnetic pole.
20. An induction motor comprising:
a stator assembly comprising a plurality of circumferentially spaced conductive windings; and
a rotor assembly comprising a plurality of circumferentially spaced conductive bars that interact with the plurality of windings as the rotor assembly rotates to produce a magnetic field, wherein the stator assembly and the rotor assembly form an alternating current asynchronous induction motor, and
wherein the induction motor comprises a magnetic pole pitch within the gap between the stator assembly and the rotor assembly of less than two inches, and
wherein the induction motor comprises a fractional slot winding.
21. The induction motor of claim 20 , wherein the rotor assembly rotates around the stator assembly.
22. The induction motor of claim 20 , wherein the plurality of windings are arranged in a distributed winding configuration.
23. The induction motor of claim 20 , wherein the plurality of windings are arranged in a wave winding configuration.
24. The induction motor of claim 20 , wherein the stator assembly further comprises a heat exchanger positioned between the plurality of windings.
25. The induction motor of claim 20 , wherein the induction motor comprises a magnetic pole pitch of less than 1.5 inches.
26. The induction motor of claim 20 , wherein the rotor assembly comprises a rotor frame and a rotor cage positioned within the rotor frame.
27. The induction motor of claim 20 , wherein the plurality of conductive bars comprise at least one bar having a teardrop cross-sectional shape.
28. The induction motor of claim 20 , wherein the induction motor comprises between four and twelve magnetic poles.
29. The induction motor of claim 28 , wherein the plurality of conductive bars comprises between three and seven conductive bars per magnetic pole.