高压方波脉冲下的电热老化绝缘寿命模型  

Insulation Life Models for Electrical and Thermal Aging under Continuous High Square Impulses Voltage

作　　者：曹开江[1] 吴广宁[1] 高波[1] 周力任[1] 郭小霞[1] 雷克刚[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《绝缘材料》2009年第5期64-67,共4页Insulating Materials

基　　金：国家自然科学基金(50377035);教育部博士点基金(20050613008);教育部重点科技项目

摘　　要：采用一种高压脉冲绝缘老化试验系统,模拟变频器对变频调速牵引电机定子绕组绝缘材料——聚酰亚胺薄膜进行脉冲电压幅值-温度、频率-温度和频率-电压联合老化试验,利用一元二参数Weibull分布统计分析了3种老化条件下的绝缘寿命试验数据,提出了脉冲下绝缘材料的电热联合老化寿命模型。The stator insulation of inverter-fed motors, which experiences continuous impulses with significant harmonics and transients, may damage much earlier. There are many differences in insulation aging mechanism between under continuous impulses and sine waves. In order to test the insulation properties under continuous impulses, a new insulation aging test system was used to simulate the aging effect of converter on the winding insulation in the inverter-fed motors. The influences of multi-stress, including impulse amplitude-temperature, impulse frequency-temperature and impulse frequency-amplitude on the insulation lifetime were investigated by using polyimide film. And the test data under different conditions were analyzed by the statistic analysis method of Weibull distribution. Finally, the insulation life models for multi-stress were developed based on the above test results. It is helpful for the insulation design of inverter-fed motors.

关 键 词：变频电机 绝缘 老化 寿命模型 

分 类 号：TM201.4[一般工业技术—材料科学与工程] TM201.42[电气工程—电工理论与新技术]