Magnetic cap element for a stator of a generator
First Claim
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1. A stator system of a wind turbine generator, the stator system comprising:
- a stator housing element, the stator housing element comprising a first surface comprising slots to which stator windings are attachable, and a second surface radially opposite to the first surface, the second surface comprising an axially extending groove,a cap element mounted to the stator housing element to close the groove such that a channel for guiding a cooling fluid within the groove is formed, andan insulation layer located between the cap element and an inner volume of the groove, wherein the insulation layer is impregnated with resin, and wherein the insulation layer comprises an expandable fibrous material arranged such that upon impregnation with the resin the insulation layer expands and acts as a spring to fix the cap element to the stator housing element,wherein the cap element comprises a magnetic material.
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Abstract
A stator system for a generator, in particular a generator of a wind turbine is disclosed. The stator system includes a housing element including a groove and a cap element for closing the groove such that a channel for guiding a cooling fluid within the groove is formed. The cap element includes a magnetic material.
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Citations
13 Claims
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1. A stator system of a wind turbine generator, the stator system comprising:
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a stator housing element, the stator housing element comprising a first surface comprising slots to which stator windings are attachable, and a second surface radially opposite to the first surface, the second surface comprising an axially extending groove, a cap element mounted to the stator housing element to close the groove such that a channel for guiding a cooling fluid within the groove is formed, and an insulation layer located between the cap element and an inner volume of the groove, wherein the insulation layer is impregnated with resin, and wherein the insulation layer comprises an expandable fibrous material arranged such that upon impregnation with the resin the insulation layer expands and acts as a spring to fix the cap element to the stator housing element, wherein the cap element comprises a magnetic material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for manufacturing a stator system for a wind turbine generator, the method comprising
forming an axially extending groove in a second surface of a stator housing element of the stator system, wherein the stator housing element comprises a first surface comprising slots to which stator windings are attachable, the first surface being radially opposite to the second surface, mounting a cap element to the stator housing element for closing the groove such that a channel for guiding a cooling fluid within the groove is formed, interposing an insulation layer between the cap element and an inner volume of the groove, and impregnating the insulation layer with resin, wherein the insulation layer comprises an expandable fibrous material such that upon impregnation of the insulation layer with the resin the insulation layer expands and acts as a spring to fix the cap element to the stator housing element, wherein the cap element comprises a magnetic material.
Specification