Could you please tell me what are multi-layer pressed insulation and spirally wound insulation?

littleshrimp

Could you please tell me what are multi-layer pressed insulation and spirally wound insulation? [Copy link]

GB9706.1-2020 mentions multi-layer pressed insulation layers and spirally wound insulation layers in winding components. I don’t quite understand what it means. Has anyone come across it?

littleshrimp

I roughly know that it should be the isolation layer between the windings or between the windings and the core.

qwqwqw2088

Multilayer pressed insulation usually has higher electrical strength, with more uniform pressure and temperature between layers, using heat-resistant plastic materials such as polyvinyl chloride (PVC) and polyethylene (PE).
Spiral wound insulation may have relatively lower electrical strength, using materials such as polyester film and polyimide film.