Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)
- 2003.05d
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- Pages.38-42
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- 2003
Development and Evaluation of Epoxy VPI Insulation for High Voltage Rotating Stator Windings
고압회전기 권선용 에폭시 VPI 절연물의 개발과 평가
- Lee, Chang-Ryong (HEMRI, HYUNDAI HEAVY INDUSTRY, Ltd.) ;
- Choi, Yong-Chan (HEMRI, HYUNDAI HEAVY INDUSTRY, Ltd.)
- Published : 2003.05.30
Abstract
The use of VPI impregnated mica tape as high voltage insulation for large rotating electric machines requires a careful balance of processes and materials to obtain the desired electrical, mechanical and thermal characteristics. The stator insulation systems such as epoxy bonded high voltage mica tape have been produced for many years. One such system employing an epoxy and anhydride impregnating resin developed by Hyundai Heavy Industries, Co. (hereafter, HHI), to satisfy customer requests for an epoxy bonded insulation system. HHI applies the following electrical and thermal evaluations such as dielectric breakdown, voltage endurance, dissipation factor vs. temperature, isothermal weight loss, and so on. A detailed laboratory evaluation can describe specific physical limitations for an insulation system and permit development of long-term operation guidelines that permit full utilization of the proposed system. HHI has found these evaluations very helpful in qualifying insulation system for the repair of both large motors and generators.