Insulation problems in medium-voltage stator coils under fast repetitive voltage pulses

被引：40
|
作者：
Haq, Saeed Ul [1 ]
Jayaram, Shesha H. [1 ]
Cherney, Edward A. [1 ]
机构：
[1] Univ Waterloo, Dept Elect & Comp Engn, Waterloo, ON N2L 3G1, Canada
来源：
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2008年 / 44卷 / 04期
基金：
加拿大自然科学与工程研究理事会;
关键词：
adjustable-speed drives; converters; dielectric heating; groundwall insulation; induction motor; partial discharge (PD); pulse voltage; solid-state switches;
D O I：
10.1109/TIA.2008.926305
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, the degradation processes in stator-bar groundwall insulation that is subjected to steep-front voltage pulses, at different temperatures, are studied. The test conditions include pulse voltage amplitudes up to 6 kV(p) and pulse switching frequencies up to 3 kHz in ambient temperatures of 23 degrees C, 120 degrees C, and 155 degrees C. During the aging process, the surface temperature is monitored with an infrared camera to determine the regions with highest temperatures and the partial discharge (PD) activity. The visual examination of failed bars confirmed that the groundwall insulation in these regions is degraded.
引用
收藏
页码：1004 / 1012
页数：9
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