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허진혁(Jin-Huek Hur),김철원(Chul-Won Kim),이은탁(Eun-Tak Lee),임윤철(Yoon-Chul Im),문승재(Seung-Jae Moon),이재헌(Jae-Heon Lee) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.11
In this paper, the heat resistance reliability of an axial smoke exhaust fan was investigated. An axial smoke exhaust fan should be capable of operating at 250 ℃ for 2 hours. The failure of an axial smoke exhaust fan occurred in the motor due to high temperature. Therefore, the heat resistance reliability of an axial smoke exhaust fan was evaluated by the heat resistance reliability test of a motor. A B10 life with a 90% confidence level of the installed motor was estimated to be about 48 minute. The main failure mechanisms of the motor were melting of bond and insulating paper and burning of insulating materials in the coil. The heat resistance reliability of the motor was improved by changing the way to unite the core and the coil and by replacing the insulating paper and the insulating materials of the coil. A B10 life with a 90% confidence level of a modified motor was estimated to be over 120 minute.