Production method for a multi-layer transformer winding having insulating layer
AssigneeABB Technology AG
InventorsRoland HOFFMANN, Christian Gruettner, Karl Zillmann, Benjamin Weber, Joerg Nelges
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Abstract
A method is disclosed for producing a multi-layer transformer winding. During or after the winding of a conductor layer around a winding body, a layer of electrically insulating material can be applied on the radially outer surface thereof. A dry fiber composite can be used as the insulating material. The fiber composite can be bonded into an insulating layer by heating the transformer winding to a composite temperature.
Claims14
A method for producing a multilayer transformer winding, comprising:
- winding a conductor layer around a winding former;
- applying during or after the winding, a stratum of electrical insulation material to a radially outer surface of the conductor layer, the insulation material including a dry fiber composite material;
- and
- heating the conductor layer to a bonding temperature to form an insulation stratum.
A multilayer transformer winding comprising:
- at least two winding layers;
- and
- at least one stratum of insulation material between the two winding layers, wherein the insulation material is a dry fiber composite material heat bonded to the winding layers to form an insulation stratum.
A multilayer transformer winding comprising:
- at least two winding layers;
- and
- at least one insulation stratum between the winding layers wherein insulation material of the at least one insulation strata contains a material additive which expands irreversibly when heated for a first time to a specific expansion temperature.
Dependencies are inferred from the claim text.