Laminate structure suitable for use as electrical insulation comprising: a) a corona-resistant layer comprising 90 to 99 weight percent uniformly distributed calcined mica and 1 to 10 weight percent aramid material, the aramid material being in the form of floc, fibrid, or mixtures thereof; b) a support layer comprising unidirectional or woven filament yarns, the support layer having a first and second face; and c) a resin-compatible layer comprising 60 to 80 weight percent uniformly distributed uncalcined mica and 20 to 40 weight percent aramid material, the aramid material being in the form of floc, fibrid, or mixtures thereof;

wherein the first face of the support layer is directly bound to the corona-resistant layer and the second face of the support layer is directly bound to the resin-compatible layer; the laminate structure having a total mica content of 60 weight percent or greater.

Laminate structure suitable for use as electrical insulation comprising: a) a corona-resistant layer comprising 90 to 99 weight percent uniformly distributed calcined mica and 1 to 10 weight percent aramid material, the aramid material being in the form of floc, fibrid, or mixtures thereof; b) a support layer comprising unidirectional or woven filament yarns, the support layer having a first and second face; and c) a resin-compatible layer comprising 60 to 80 weight percent uniformly distributed uncalcined mica and 20 to 40 weight percent aramid material, the aramid material being in the form of floc, fibrid, or mixtures thereof;

wherein the first face of the support layer is directly bound to the corona-resistant layer and the second face of the support layer is directly bound to the resin-compatible layer; the laminate structure having a total mica content of 60 weight percent or greater.

A high-temperature insulation assembly for use in high-temperature electrical machines and a method for forming a high-temperature insulation assembly for insulating conducting material in a high-temperature electrical machine. The assembly includes a polymeric film and at least one ceramic coating disposed on the polymeric film. The polymeric film is disposed over conductive wiring or used as a conductor winding insulator for phase separation and slot liner.

A high-temperature insulation assembly for use in high-temperature electrical machines and a method for forming a high-temperature insulation assembly for insulating conducting material in a high-temperature electrical machine. The assembly includes a polymeric film and at least one ceramic coating disposed on the polymeric film. The polymeric film is disposed over conductive wiring or used as a conductor winding insulator for phase separation and slot liner.

An electrical conductor assembly includes an electrical conductor, an electrically insulating jacket disposed around a conductor section of the electrical conductor, an electrically conductive sleeve disposed around a first insulating jacket section of the insulating jacket, and an electrically conductive yarn for realizing an electric field control. The electrically conductive yarn is wound around a second insulating jacket section of the electrically insulating jacket in adjacent relation to the first insulating jacket section.