Dynamoelectric machine

• US 8,350,424 B2
• Filed: 09/14/2009
• Issued: 01/08/2013
• Est. Priority Date: 10/24/2008
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Af Ursin, Ilkka
• Primary Examiner(s): MULLINS, BURTON S
• Application Number:
  US13/125,759
• Publication Number:
  US 20110227431A1
• Time in Patent Office: 1,212 Days
• Field of Search: 310/64, 310 58- 59
• US Class Current: 310/64
• CPC Class Codes: F28D 15/0275 Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
• CPC Class Codes: F28F 1/122 and being formed of wires
• CPC Class Codes: H02K 9/225 Heat pipes

Abstract

The invention relates to a dynamoelectric machine (1) comprising a stator (2) and a rotor (3). At least the stator (2) has a winding system (4) which is arranged in grooves of the stator (2). Heat is transferred in a substantially radial direction on the front sides (6) of the stator (2) by means of heat pipes (5).

Claims

1. A dynamoelectric machine comprising:

a stator having axial recesses and grooves for receiving a winding system which forms end windings on end sides of the stator;

a rotor interacting with the stator; and

heat pipes, each having an evaporation zone and a condensation zone and transporting heat essentially radially from the end sides of the stator, said heat pipes having a mesh at an end portion of the evaporation zone and/or of the condensation zone to increase a surface area of the evaporation zone and/or of the condensation zone, said mesh being thermally conductive and configured to realize a swirling of a flow of air in the evaporation zone and/or condensation zone,

wherein the mesh of the condensation zone of each of the heat pipes is arranged in axial alignment with the recesses.

2. The dynamoelectric machine of claim 1, wherein the recesses form cooling channels.

3. The dynamoelectric machine of claim 2, wherein cooling air is generated through the recesses of the stator in a forced or natural manner.

4. The dynamoelectric machine of claim 1, wherein the mesh is a wire mesh.

5. The dynamoelectric machine of claim 1, wherein the cooling circuit is an air cooling circuit.

6. The dynamoelectric machine of claim 1, wherein the rotor and at least one end winding arranged on an end side of the stator are disposed in the cooling circuit.

7. The dynamoelectric machine of claim 1, wherein the thermally conductive material is metal.

8. The dynamoelectric machine of claim 1, constructed in closed construction in accordance with Ingress Protection Code IP55, which limits ingress of dust and protects against low-pressure water jets.

9. A dynamoelectric machine, comprising:

a stator having a lamination stack and grooves for receiving a winding system which forms end windings on end sides of the stator;

a rotor interacting with the stator;

heat pipes, each having an evaporation zone and a condensation zone and transporting heat essentially radially from the end sides of the stator, said evaporation zone being arranged within a closed cooling circuit of the dynamoelectric machine, and said heat pipes having a mesh at an end portion of the evaporation zone and/or of the condensation zone to increase a surface area of the evaporation zone and/or of the condensation zone, said mesh being thermally conductive and configured to realize a swirling of a flow of air in the evaporation zone and/or condensation zone,

at least one bearing shield disposed at each of the end sides of the stator and having cooling ribs which project into the closed cooling circuit, and

a protective pipe disposed at each of the end sides of the stator, said protective pipe extending from the lamination stack of the stator to the bearing shield and penetrating the heat pipes such that the evaporation zone of each of the heat pipes is disposed radially inside the protective pipe and the condensation zone of each of the heat pipes is situated outside the protective pipe.

10. The dynamoelectric machine of claim 9, wherein the mesh is a wire mesh.

11. The dynamoelectric machine of claim 9, wherein the cooling circuit is an air cooling circuit.

12. The dynamoelectric machine of claim 9, wherein the rotor and at least one end winding arranged on an end side of the stator are situated in the cooling circuit.

13. The dynamoelectric machine of claim 9, wherein the thermally conductive material is metal.

14. The dynamoelectric machine of claim 9, constructed in closed construction in accordance with Ingress Protection Code IP55, which limits ingress of dust and protects against low-pressure water jets.