POLE SHOE

• US 20140091650A1
• Filed: 03/26/2012
• Published: 04/03/2014
• Est. Priority Date: 04/01/2011
• Status: Abandoned Application

• Current Assignee: Wobben Properties Gmbh (Aloys Wobben Stiftung)
• Original Assignee: Wobben Properties Gmbh (Aloys Wobben Stiftung)
• Inventors: Lenschow, Gerhard
• Application Number:
  US14/007,936
• Publication Number:
  US 20140091650A1
• Time in Patent Office: Days
• US Class Current: 310/54
• CPC Class Codes: H02K 2203/12 Machines characterised by the bobbins for supporting the windings
• CPC Class Codes: H02K 3/24 with channels or ducts for cooling medium between the conductors
• CPC Class Codes: H02K 3/52 Fastening salient pole windings or connections thereto
• CPC Class Codes: H02K 7/1838 Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24
• CPC Class Codes: H02K 9/227 Heat sinks
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

The invention relates to a pole shoe of an electrical machine, in particular a rotor of an electrical generator of a wind turbine generator system, comprising a pole shoe body for conducting a magnetic field and for receiving a winding for conducting an electrical current, in particular an excitation current, for producing the magnetic field, and at least one heat sink, entirely or partially surrounding the pole shoe body, for cooling the pole shoe, wherein the heat sink is arranged between the pole shoe body and the winding.

Claims

1. A pole shoe of an electrical generator of a wind turbine generator system, the pole shoe comprising:

a winding configured to conduct an electrical current and produce a magnetic field;

a pole shoe body for conducting the magnetic field produced by the winding; and

at least one heat sink at least partially surrounding the pole shoe body for cooling the pole shoe the heat sink being arranged between the pole shoe body and the winding.

2. The pole shoe according to claim 1, wherein the heat sink includes a winding body for receiving the winding.

3. The pole shoe according to claim 1, further comprising an insulation foil for electrically insulating the heat sink from the winding and for conducting heat from the winding to the heat sink.

4. The pole shoe according to claim 1, wherein the heat sink is hollow and configured to convey a coolant therethrough.

5. The pole shoe according to claim 1, wherein the heat sink is made of aluminum.

6. The pole shoe according to claim 4, wherein the heat sink comprises at least two connections for connecting a cooling system, wherein a first coolant is conveyed in to the heat sink through one of the two connections and conveyed out of the heat sink through the other of the two connections.

7. The pole shoe according to claim 1, wherein the pole show is prepared to be used in a salient pole machine.

8. A generator for transforming kinetic energy into electrical energy, the generator comprising:

a stator; and

a rotor, wherein at least one the stator and the rotor comprises a plurality of pole shoes, each of the pole shoes including;

a winding configured to conduct an electrical current and produce a magnetic field;

a pole shoe body for conducting the magnetic field produced by the winding; and

at least one heat sink at least partially surrounding the pole shoe body for cooling the pole shoe, the heat sink being arranged between the pole shoe body and the winding.

9. The generator according to claim 8, wherein the plurality of pole shoes are mounted to the rotor or the stator in such a way that each pole shoe comprises a winding that is arranged around the respective heat sink in such a way that the heat sink is arranged between the pole shoe body and the winding.

16. The generator according to claim 8, wherein the rotor and the stator are ring shaped.

10. A pole shoe heat sink for cooling a pole shoe, the pole shoe heat sink comprising:

a rigid body configured to carry a winding and to be located around the pole shoe body.

11. The pole shoe heat sink according to claim 10, further comprising a receiving space for receiving the pole shoe body.

12. (canceled)

14. The method according to claim 12, further comprising pumping a coolant through the heat sink.

15. The method according to claim 14, further comprising conveying the coolant to a heat exchanger through a first connection of the heat sink, wherein the coolant is cooled in the heat exchanger and provided back into the heat sink through a second connection.

13. A method for manufacturing a pole shoe, the method comprising:

a heat sink on a pole shoe body for cooling a pole shoe so that the heat sink at least partially surrounds the pole shoe body;

arranging a winding on the heat sink, the heat sink being arranged between the winding and the pole shoe body.