Electrical insulation particularly for use in winding slots of dynamo-electric machines and method for its manufacture
US3974314A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1974 |
| Grant date | Aug 10, 1976 |
| Priority date | — |
| Expiry date | Mar 20, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/3691
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A laminated molded insulation material for insulation of electrical machines and particularly useful for conductor slot insulation of dynamo-electric machines is produced by covering both sides of a dielectrically strong, homogeneous electrically insulating polyheterocylene foil such as polyhydantoin with protective layers of tangled fibers such as an aromatic polyamide paper known under the trade name "Nomex". The composite consisting of the protective tangled fiber layers joined to the insulating foil is then enclosed on both sides by layers of a high-tensile strength, fiber-reinforced synthetic resin using, for example, a glass fleece or glass-silk fabric as the fiber material, and which are joined to the protective tangled fiber layers and in such manner that within the protective layers opposite the insulating foil there exists a continuous remainder of non-resin impregnated tangled-fiber structure consisting solely of tangled fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.