一、引言在现代大型高压电机中,趋于以环氧树脂绝缘(黄绝缘)取代沥青绝缘(黑绝缘)作为发电机定子线棒对地的主绝缘或其他部位的绝缘。环氧粉云母绝缘与沥青云母带绝缘相比具有耐电晕、电气强度高、介损小等优点,还具备良好的耐热、耐潮和防霉性能,对电机、电器可改善其绝缘性能,促进结构小型化,并能节省导电、导磁材料,并可使电机电器的绝缘工艺由手工转向机械化或半自动化,为我国的电机制造业开辟了新 I. INTRODUCTION In modern large-scale high-voltage motors, the insulation of the asphalt (yellow insulation) instead of the asphalt insulation (black insulation) tends to be used as the insulation of the main insulation or other parts of the generator stator bar. Epoxy powder mica insulation and asphalt mica insulation compared with a corona resistant, high electrical strength, low dielectric loss, but also has good heat, moisture and mildew performance, the motor, electrical appliances can improve its insulation properties, Promote the miniaturization of the structure, and can save the conductive, magnetic materials, and can make the electrical and mechanical insulation from manual to mechanized or semi-automatic, for our country’s motor manufacturing industry has opened up a new