在保证定子绕组绝缘结构可靠性的前提下，通过控制漆包线导体直径（负公差）、漆膜偏心度（≤1.5）和漆膜厚度，减薄槽绝缘及槽楔厚度等方法，优化普通散绕绕组绝缘结构，提高定子槽满率，有利于提升电机效率。对采用优化设计组合的3种典型绝缘结构进行热老化评定，结果表明优化设计的3种绝缘结构温度指数均超过160 ℃，达到155（F）级。采用优化的绝缘结构方案，可以对高效电机的设计与开发提供帮助。

On the premise of ensuring reliability of insulation structure of stator winding, the insulation structure of ordinary winding is optimized by controlling the diameter of enameled wire conductor (negative tolerance) and the eccentricity (≤1.5) and thickness of paint film, and reducing the thickness of slot insulation and slot wedge, so as to improve the full ratio of stator slot and the motor efficiency. Thermal aging experiment is carried out for three insulation structures. The results show that the temperature indices of three insulation structures are all over 160 ℃, reaching 155(F) grade. The optimized insulation structure can help the design and development of high efficiency motor.