少胶绝缘高压电机超薄型主绝缘结构研究

The Ultra-thin Main Insulation Structures Lapped with Dry-mica Tapes for High Voltage Motors

系统研究了绝缘材料及绕包结构等对高压电机主绝缘性能的影响。采用玻璃云母带与薄膜云母带为主绝缘绕包材料,通过交替半迭包工艺绕包的云母绝缘结构,经高性能环氧酸酐树脂(VPI)浸渍固化及薄型低阻防晕材料保护后制作的6 k V和10 k V超薄型高压电机主绝缘结构,表现出优良的电性能和老化寿命,实现了高压电机主绝缘的明显减薄。采用该超薄型绝缘结构制造的高压电机绕组温升显著降低,体积明显缩小,制造成本下降。

Effect of the insulation materials and structures lapped with dry-mica tapes on the main insulation properties has been systematically investigated. The ultra-thin main insulation structures of 6 k V and 10 k V grades have been successfully manufactured by alternative half-overlapped with the designed glass or PET mica tapes,followed by VPI with anhydride-cured epoxy resins and corona protection with low electrical resistant materials,and exhibited excellent insulation properties and long thermo-electric aging life. The high voltage motors fabricated with the ultra-thin main insulation structures are lowered in the servicing temperature rise,obvious lightweight and reduced in production cost.