ROTATING MACHINE WITH IMPROVED COOLING

• US 20150155751A1
• Filed: 11/25/2014
• Published: 06/04/2015
• Est. Priority Date: 11/29/2013
• Status: Active Grant

• Current Assignee: GE Renewable Technologies (Alstom SA)
• Original Assignee: Alstom Renewable Technologies
• Inventors: Frutiger, Simon Andreas, BAUMEISTER, Stefan
• Granted Patent: US 10,305,353 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02K 2213/03 Machines characterised by numerical values, ranges, mathematical expressions or similar information
• CPC Class Codes: H02K 3/30 Windings characterised by the insulating material
• CPC Class Codes: H02K 3/345 between conductor and core, e.g. slot insulation
• CPC Class Codes: H02K 3/527 applicable to rotors only
• CPC Class Codes: H02K 9/223 Heat bridges

Abstract

The present invention relates to a rotor for a rotating machine and more in particular, to a component of the rotor. The present invention generally relates to an improved cooling configuration of a rotating machine. Unlike generally known arrangements, the solution proposed herein does not guide coolant fluid to parts which require cooling. Instead, the heat generated from the losses in the rotor pole is transferred to parts having favourable characteristics for establishing heat exchange.

Claims

1. A component for a rotating machine comprising a rotor pole, the rotor pole comprising:

a pole core; and

a rotor coil arranged around said pole core, wherein said rotor coil is separated from the pole core such that at least a gap is formed in between the rotor coil and the pole core;

wherein said at least a gap is at least partially filled with a material having a thermal conductivity substantially greater than 0.25 W/mK.

2. The component according to claim 1, wherein the thermal conductivity of the material is substantially equal or greater than 1 W/mK.

3. The component according to claim 1, wherein the thermal conductivity of the material has a value comprised within a range of 20-80 W/mK.

4. The component according to claim 1, wherein the thermal conductivity of the material has a value comprised within a range of 50-100 W/mK.

5. The component according to claim 1, wherein the pole core is mushroom-shaped such that a first lateral gap and a second upper gap are formed between the pole core and the rotor coil.

6. The component according to claim 1, wherein said first lateral gap is perimetral around the pole core , the material being inserted only within two opposite sides of said perimetral gap, the sides filled with said material being aligned with a rotating axis a of the rotating machine when the pole core is mounted therein.

7. The component according to claim 1, wherein the material is a thermally high conductive silicone.

8. The component according to claim 1, wherein the material is aluminum oxide and/or aluminum nitride.

9. The component according to claim 7, wherein the material is a silicone matrix comprising aluminum oxide and/or aluminum nitride particles dissolved therein.

10. The component according to claim 1, wherein the material has a form of one or more plates disposed within said at least a gap.

11. The component according to claim 8, wherein the material is in the form of powder or grain.

12. The component according to claim 7, wherein the material is in the form of consolidated glue or resin inserted within said gaps.

13. A rotor for a rotating machine comprising at least a component according to claim 1.

14. A rotating machine comprising a rotor according to claim 1.