Insulating material for electrical machines
View Patent ↗An insulating material for an electrical machine that insulates coiled windings is provided. The insulating material includes a carrier material and adhesive coatings on the front and back of the carrier material. The adhesive coatings are mounted and aligned on the front and back of the carrier material in such a way that in the carrier material in the insulation state a direct frictional connection is developed between the adhesive coatings on the front and back.
1. An insulating material used on an electrical machine for insulating turns of wound coil assemblies, comprising:
a carrier material comprising a front and a back; and
a plurality of adhesive coatings which are applied in a pattern on the front and back of the carrier material,
wherein the plurality of adhesive coatings are located opposite each other on the front and on the back and are arranged congruently with respect to one another such that in the carrier material a direct frictional connection is developed in an insulation state between the plurality of adhesive coatings.
2. The insulating material as claimed in claim 1 , wherein an epoxy resin is used as an adhesive material for the plurality of adhesive coatings.
3. The insulating material as claimed in claim 2 , wherein a thickness of an epoxy resin coating is essentially 0.020 mm per side.
4. The insulating material as claimed in claim 1 , wherein the plurality of adhesive coatings on the front and on the back represent an essentially opposite symmetrical pattern.
5. The insulating material as claimed in claim 4 , wherein the plurality of adhesive coatings are diamond-shaped.
6. The insulating material as claimed in claim 5 , wherein a side length of each diamond is in a range of 9-10 mm.
7. The insulating material as claimed in claim 5 , wherein a distance between two adjacent side lengths of two diamonds is in the range of 5.5-7 mm.
8. The insulating material as claimed in claim 4 , wherein the plurality of adhesive coatings are circular in shape.
9. The insulating material as claimed in claim 1 , wherein transformer pressboard, kraft paper, aramid paper, polyester film, textile fiber or a textile-based material is used as the carrier material.
10. The insulating material as claimed in claim 1 , wherein the electrical machine is a transformer, a converter, a transducer or a generator.