발전기 고정자 권선에 사용되는 절연재료의 기계적 및 전기적 특성

Mechanical and Electrical Properties of Insulation System used in Generator Stator Windings

Mechanical and electrical properties of mica/epoxy composite materials were investigated by dynamic mechanical analyzer(DMA) and dielectric analysis (DMA). Both modulus and permittivity of sound specimens were higher than those of aged specimens. Two results show that $tan{\delta}$ of sound specimens is lower than that of aged specimens. DMA results showed that glass transition temperatures of sound and aged specimens are observed to be $87.16^{\circ}C$ and $88.38^{\circ}C$, which increases with the increase of aging time.