| Title |
Insulation Breakdown Properties of AC and DC according to Curvature Variation of PAI Organic/Inorganic Hybrid Coils |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.10.1721 |
| Keywords |
Rectangle magnet wire ; AC and DC insulation breakdown voltage ; DC voltage ; PAI vanish coil ; Nano silica filled vanish coil |
| Abstract |
4-types of coils were prepared by coating with polyamideimide (PAI) organic/inorganic hybrid. One type was made with original PAI vanish and the other 3-types were made of double layers, that was to say, high flexural PAI layer and high anti-corona PAI/nanosilica (15 wt%) layer. Drying temperature (T/D) were 220°C, 240°C, and 260°C, respectively and rectangular type coil for high-voltage rotating machine was used. DC and AC electrical breakdown tests were carried out in order to study the insulation properties according to T/D temperature and coil curvature (5, 15, and 25mmφ). As the curvature increased, electrical breakdown voltage decreased and as T/D temperature decreased, electrical breakdown voltage increased. |