摘要
逆变器输出的高压脉冲方波会导致变频调速牵引电机绝缘过早损坏,其老化机理与工频交流电压下不同。利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的老化作用,以聚酰亚胺薄膜为试验对象,研究了脉冲方波幅值、频率对绝缘寿命的影响,提出了高压脉冲方波下绝缘材料的电老化寿命模型。
High voltage square impulses from converter can make stator insulation of inverter-fed motors damaged much earlier. There are many differences in insulation aging mechanism between under continuous impulses and under sine voltages. In order to test insulation properties under continuous impulses, a new insulation aging test system is used to simulate the aging effect of converter on the winding insulation in the inverter-fed motors. The influences of impulse amplitude and frequency on insulation lifetime are investigated by using polyimide film. Finally, an insulation electrical aging lifetime model is proposed.
出处
《电工技术学报》
EI
CSCD
北大核心
2009年第3期25-30,共6页
Transactions of China Electrotechnical Society
基金
国家自然科学基金资助项目(50377035)
关键词
变频电机
老化
绝缘
模型
Inverter-fed motors, aging, insulation, model
