Electrical aging tests on different kind of insulating systems adopted for induction stator motor

2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2015-12-17 DOI:10.1109/CEIDP.2015.7352068

F. Guastavino, D. Cordano, E. Torello, G. Secondo

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引用次数: 2

Abstract

The massive adoption of electronic converters to supply induction motors leads to critical problems during the normal operation. One of the most investigated problem is the unexpected early failure of the stator winding insulation. When the motors are supplied by electronic converters, the stator insulating system could be subjected to over-voltages due to resonance and reflection phenomena; if these over-voltages exceed the partial discharge inception voltage, partial discharge activity can incept. The erosion of the enamel used to insulate the stator winding wires, due to the presence of partial discharge activity, leads to the degradation of the dielectric characteristics of the insulating system and in the worst cases, to a total breakdown. This investigation campaign presents the outcome of experimental tests aimed at the investigation of the unipolar pulses voltage waveforms role on the degradation of Type I stator winding insulation systems. Induction motors having different insulating systems have been considered. The stator windings have been realized using conventional or corona resistant enameled wires.

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感应定子电机不同绝缘系统的电老化试验

大量采用电子变流器供应感应电机，导致在正常运行中出现严重问题。定子绕组绝缘的早期意外失效是目前研究最多的问题之一。当电机采用电子变流器供电时，定子绝缘系统会因谐振和反射现象而产生过电压;如果这些过电压超过部分放电的起始电压，部分放电活动就会开始。由于局部放电活动的存在，用于绝缘定子绕组线的搪瓷的腐蚀会导致绝缘系统的介电特性退化，在最坏的情况下，会导致完全击穿。这项调查活动提出了实验测试的结果，旨在研究单极脉冲电压波形对I型定子绕组绝缘系统退化的作用。考虑了具有不同绝缘系统的感应电动机。定子绕组已采用常规或耐电晕漆包线实现。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)

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