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http://dx.doi.org/10.5370/KIEE.2016.65.10.1721

Insulation Breakdown Properties of AC and DC according to Curvature Variation of PAI Organic/Inorganic Hybrid Coils  

Park, Jae-Jun (Department of Electrical Electronic Engineering, Joongbu University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.65, no.10, 2016 , pp. 1721-1726 More about this Journal
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 $220^{\circ}C$, $240^{\circ}C$, and $260^{\circ}C$, 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 $25mm{\Phi}$). As the curvature increased, electrical breakdown voltage decreased and as T/D temperature decreased, electrical breakdown voltage increased.
Keywords
Rectangle magnet wire; AC and DC insulation breakdown voltage; DC voltage; PAI vanish coil; Nano silica filled vanish coil;
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