LAMINATED CORE ASSEMBLY

• US 20140183989A1
• Filed: 03/28/2012
• Published: 07/03/2014
• 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:
  US14/007,934
• Publication Number:
  US 20140183989A1
• Time in Patent Office: Days
• US Class Current: 310/54
• CPC Class Codes: H01F 41/02 for manufacturing cores, coils, or magnets H01F41/14 takes precedence; for dynamo-electric machines H02K15/00
• CPC Class Codes: H02K 1/20 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 15/04 of windings, prior to mounting into machines insulating windings H02K15/10, H02K15/12
• CPC Class Codes: H02K 3/325 for windings on salient poles, such as claw-shaped poles
• CPC Class Codes: H02K 3/345 between conductor and core, e.g. slot insulation
• CPC Class Codes: H02K 7/1838 Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
• CPC Class Codes: H02K 9/02 by ambient air flowing through the machine
• CPC Class Codes: H02K 9/223 Heat bridges
• CPC Class Codes: H02K 9/227 Heat sinks
• CPC Class Codes: Y10T 29/49009 Dynamoelectric machine

Abstract

The invention relates to a laminated core assembly of an electric generator, in particular of a generator of a gearless wind turbine. The laminated core assembly comprises at least one laminated core, at least one winding arranged around the laminated core, and an electrical insulating means arranged between the laminated core and the winding, wherein the insulating means has a composite material for conducting the heat arising in the winding.

Claims

1. A laminated core assembly of an electric generator of a gearless wind turbine, the laminated core assembly comprising:

at least one laminated core;

at least one winding arranged around the laminated core; and

one or more electrical insulating means arranged between the laminated core and the winding, wherein the insulating materials are a composite material for conducting heat generated by the winding.

2. the laminated core assembly according to claim 1, wherein the insulating means includes a paper and a resin impregnated layer of material arranged on the paper.

3. The laminated core assembly according to claim 1, wherein the insulating means comprises ceramic particles.

4. The laminated core assembly according to claim 1, wherein the at least one laminated core has a heat sink that at least partially surrounds the laminated core, wherein the heat sink is arranged between the laminated core and the winding.

5. The laminated core assembly according to claim 4, wherein the insulating means are arranged between the winding and the heat sink.

6. The laminated core assembly according to claim 4, wherein the heat sink has connections that are at least partially integrated into the laminated core.

17. The laminated core assembly according to claim 2, wherein the paper is aramid paper.

7. An electric generator of a gearless wind turbine, the electric generator comprising:

a rotor that includes a rotor belt;

a stator that includes a stator belt, wherein at least one of the rotor and the stator has at least one laminated core assembly, the laminated core assembly including a composite material that is electrically insulating and thermally conductive; and

a cooling channel that is located in at least one of the rotor belt and the stator belt for transporting a coolant.

8. The electric generator according to claim 7, wherein at least one of the rotor and stator have a plurality of laminated cores, wherein each laminated core has one heat sink that is thermally coupled to the cooling channel.

9. The electric generator according to claim 7 wherein the rotor comprises air cooling.

10. A wind turbine comprising the electric generator according to claim 7, the wind turbine further comprising:

a pump that is functionally connected to the cooling channel; and

a heat exchanger for cooling the coolant.

11. The wind turbine according to claim 10, wherein the heat exchanger is arranged in such a way that it is cooled by incoming air flow.

12. A method for manufacturing a laminated core assembly, the method comprising:

arranging a composite material on a laminated core;

arranging a winding around the composite material;

treating the composite material to cause at least a portion of the composite material to settle into the recesses of at least one of the laminated core and the winding; and

curing the composite material located between the laminated core and the winding, the cured composite material being electrically isolating and thermally conductive, the cured composite material being configured to remove heat from the winding.

13. The method according to claim 12, wherein the composite material comprises at least one of a paper impregnated with resin and a non-woven material impregnated with resin.

14. The method according to claim 12, wherein ceramic particles are added to the composite material.

15. The method according to claim 12, wherein the composite material is cured by heat treatment.

16. The method according to claim 15, wherein the composite material is cured by tempering.