| 초록 |
As a result of measuring the Tg according to the curing conditions for 4 types of epoxy resins, 1 type and 2 types were cured at 141°C under the curing condition (150~160℃ and 8hr), and 3 types was cured at 135°C under the curing condition and 4 types was cured at 125℃ under the curing condition. In general, in terms of heat-resistant life, if the Tg is high, the heat-resistant life is good. However, in terms of driving a HV motor, it was heated and cooled while driving. It occurs in the process of repeating heating and cooling, low Tg of epoxy resin has swelled and contracted, which lead more probability of occurrence of cracks. On the contrary, the resin with high Tg has small frequency of swelling and contraction, which lead small probability of occurrence of cracks. However, in terms of impregnation properties of epoxy resin, it is determined that a resin with low Tg and viscosity may be good. |
