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자료유형
학술저널
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한국전기전자재료학회 Transactions on Electrical and Electronic Materials Transactions on Electrical and Electronic Materials 제17권 제3호
발행연도
2016.1
수록면
163 - 167 (5page)

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Inverter surge resistant enameled wire was prepared with an organic/inorganic hybrid nanocomposite, and the effectof ambient temperature on the insulation lifetime of the enameled wire in the form of twisted pair was studied bya withstanding voltage tester. The organic polymer was Polyesterimide-polyamideimide (EI/AI) and the inorganicmaterial was a Nano-sized silica (average particle size : 15 nm). The enamel thickness was 50 μm and the ambienttemperature was 100℃, 150℃, 200℃, and 250℃, respectively. Transmission electron microscopy (TEM) observation showedthat Nano-sized Silica were evenly dispersed in EI/AI. There were many air gaps in a twisted pair, therefore, whenvoltage was applied to the twisted pair, enamel erosion took place in the air gap area because of partial dischargeaccordi, ng to Paschen’s law. As ambient temperature increased, insulation lifetime decreased according to Arrheniusrelationship, which was explained by the increasing mobility of polymer chains in EI or AI. And insulation breakdownvoltage value at 10 kHz was 1,864.5 sec (31.1 min), which is 1.9 times higher than at 20 kHz, 981.6 sec (16.4 min).

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