VENTILATED ROTOR AND STATOR FOR DYNAMOELECTRIC MACHINE

• US 20120086291A1
• Filed: 10/06/2010
• Published: 04/12/2012
• Est. Priority Date: 10/06/2010
• Status: Active Grant

• Current Assignee: GE Energy Power Conversion Technology Limited (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: DeBlock, Mark John, Wilson, Blake Weldon, Mancuso, Thomas, Kanakamedala, Lakshminarayana
• Granted Patent: US 8,362,661 B2
• Time in Patent Office: Days
• US Class Current: 310/61
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 1/2766 having a flux concentration effect
• CPC Class Codes: H02K 1/32 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 9/06 with fans or impellers driven by the machine shaft

Abstract

A laminated rotor and stator are provided for a dynamoelectric machine. The rotor includes at least one end flange having a plurality of cooling apertures and at least one rotor inner vent lamination having a plurality of cooling apertures. At least one rotor outer vent lamination has a plurality of cooling apertures in communication with a first plurality of radially oriented ventilating slots. The end flange, rotor inner vent lamination and rotor outer vent lamination are configured together into a rotor lamination stack, and the plurality of cooling apertures form a generally axial cooling passage for a flow of a cooling medium.

Claims

1. A laminated rotor for a dynamoelectric machine, comprising:

at least one end flange comprising a plurality of cooling apertures;

at least one rotor inner vent lamination comprising the plurality of cooling apertures;

at least one rotor outer vent lamination comprising the plurality of cooling apertures in communication with a first plurality of radially oriented ventilation slots;

wherein the at least one end flange, the at least one rotor inner vent lamination and the at least one rotor outer vent lamination are configured together into a rotor lamination stack, and the plurality of cooling apertures form a generally axial cooling passage therethrough for a flow of a cooling medium.

2. The laminated rotor of claim 1, further comprising:

at least one rotor center lamination comprising a plurality of apertures for windings of the rotor;

wherein the rotor center lamination substantially blocks axial flow of the cooling medium.

3. The laminated rotor of claim 1, wherein the first plurality of radially oriented ventilation slots are located between pole centerlines and/or at pole centerlines.

4. The laminated rotor of claim 1, wherein the plurality of cooling apertures are located between pole centerlines and/or at pole centerlines.

5. The laminated rotor of claim 1, further comprising at least one fan mounted on a rotor shaft, wherein the at least one fan forces the cooling medium into the plurality of cooling apertures.

6. The laminated rotor of claim 1, wherein the rotor is provided in a dynamoelectric machine, the dynamoelectric machine is either a single-ended ventilated machine or a double-ended ventilated machine.

7. The laminated rotor of claim 1, further comprising:

at least one second outer rotor vent lamination comprising the plurality of cooling apertures and a second plurality of radially oriented ventilated slots in communication with the first plurality of radially oriented ventilation slots.

8. The laminated rotor of claim 1, wherein the cooling medium is air or hydrogen.

9. The laminated rotor of claim 1, wherein the rotor is provided in a dynamoelectric machine, the dynamoelectric machine is at least one of a generator and a motor.

10. The laminated rotor of claim 1, further comprising:

a plurality of V-shaped axial channels having a plurality of axial grooves located near an outer radial position of the plurality of V-shaped axial channels.

11. The laminated rotor of claim 1, further comprising:

a plurality of axial channels having a plurality of radial slots, wherein a plurality of axial grooves are located near an outer radial position of the plurality of radial slots.

12. A laminated stator for a dynamoelectric machine, comprising:

at least one end lamination comprising a plurality of slots for stator windings;

at least one first lamination comprising a first plurality of slots in communication with a first plurality of cooling apertures, the stator windings contained within the first plurality of slots;

at least one second lamination comprising a second plurality of slots and a second plurality of cooling apertures in communication with the first plurality of cooling apertures, the stator windings contained within the second plurality of slots;

wherein the at least one end lamination, the at least one first lamination and the at least one second lamination are configured together into a stator lamination stack, and the plurality of slots form a generally radial cooling passage therethrough and the first and second plurality of cooling apertures form a generally axial cooling passage therethrough for a flow of a cooling medium.

13. The laminated stator of claim 12, further comprising a rotor and wherein the cooling medium flows into the rotor at a first end of the dynamoelectric machine and out of the stator at a second and opposing end of the dynamoelectric machine.

14. The laminated stator of claim 12, wherein the stator windings are configured to have a space between the plurality of slots, the space allowing the cooling medium to pass by both sides of the stator windings.

15. The laminated stator of claim 12, wherein the stator windings are configured to have a space between the plurality of slots, the space allowing the cooling medium to pass by at least one side of the stator windings.

16. The laminated stator of claim 12, further comprising a rotor and wherein the cooling medium flows into the rotor and out of the stator at a first end of the dynamoelectric machine.

17. The laminated stator of claim 12, further comprising a rotor and wherein the cooling medium flows into the rotor and out of the stator at both a first end and second end of the dynamoelectric machine.

18. The laminated stator of claim 12, wherein the cooling medium is air or hydrogen.

19. The laminated stator of claim 12, wherein the dynamoelectric machine is at least one of a generator and a motor.

20. A dynamoelectric machine comprising a rotor and a stator, the dynamoelectric machine comprising:

at least one rotor end flange comprising a plurality of rotor cooling apertures;

at least one rotor inner vent lamination comprising the plurality of rotor cooling apertures;

at least one rotor outer vent lamination comprising the plurality of rotor cooling apertures in communication with a first plurality of rotor radially oriented ventilation slots;

at least one stator end lamination comprising a plurality of slots for stator windings;

at least one stator first lamination comprising a first plurality of slots in communication with a first plurality of stator cooling apertures, the stator windings contained within the first plurality of slots;

at least one stator second lamination comprising a second plurality of slots and a second plurality of stator cooling apertures in communication with the first plurality of stator cooling apertures, the stator windings contained within the second plurality of slots;

wherein the at least one rotor end flange, the at least one rotor inner vent lamination and the at least one rotor outer vent lamination are configured together into a rotor lamination stack, and the plurality of rotor cooling apertures form a generally axial rotor cooling passage therethrough for a flow of a cooling medium, and the at least one stator end lamination, the at least one stator first lamination and the at least one stator second lamination are configured together into a stator lamination stack, and the plurality of slots form a generally radial cooling passage therethrough and the first and second plurality of stator cooling apertures form a generally axial stator cooling passage therethrough for a flow of the cooling medium.

21. The dynamoelectric machine of claim 20, the rotor further comprising:

at least one rotor center lamination comprising a plurality of apertures for windings of the rotor;

wherein the rotor center lamination substantially blocks axial flow of the cooling medium.

22. The dynamoelectric machine of claim 20, wherein the first plurality of rotor radial oriented ventilation slots are located between pole centerlines and/or at pole centerlines.

23. The dynamoelectric machine of claim 20, wherein the plurality of rotor cooling apertures are located between pole centerlines and/or at pole centerlines.

24. The dynamoelectric machine of claim 20, further comprising at least one fan mounted on a rotor shaft, wherein the at least one fan forces the cooling medium into the plurality of rotor cooling apertures.

25. The dynamoelectric machine of claim 20, wherein the dynamoelectric machine is either a single-ended ventilated machine or a double-ended ventilated machine.

26. The dynamoelectric machine of claim 20, further comprising:

at least one second outer rotor vent lamination comprising the plurality of rotor cooling apertures and a second plurality of rotor radially oriented ventilated slots in communication with the first plurality of rotor radially oriented ventilation slots.

27. The dynamoelectric machine of claim 20, wherein the cooling medium is either air or hydrogen.

28. The dynamoelectric machine of claim 20, wherein the dynamoelectric machine is at least one of a generator and a motor.

29. The dynamoelectric machine of claim 20, further comprising at least one of:

a plurality of V-shaped axial channels having a plurality of axial grooves located near an outer radial position of the plurality of V-shaped axial channels; and

a plurality of axial channels having a plurality of radial slots, wherein a plurality of axial grooves are located near an outer radial position of the plurality of radial slots.

30. The dynamoelectric machine of claim 20, wherein the stator windings are configured to have a space between the plurality of slots, the space allowing the cooling medium to pass by both sides of the stator windings.

31. The dynamoelectric machine of claim 20, wherein the stator windings are configured to have a space between the plurality of slots, the space allowing the cooling medium to pass by at least one side of the stator windings.

32. The dynamoelectric machine of claim 20, wherein the cooling medium flows into the rotor and out of the stator at a first end of the dynamoelectric machine.

33. The dynamoelectric machine of claim 20, wherein the cooling medium flows into the rotor and out of the stator at both a first end and second end of the dynamoelectric machine.