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전폐형 유도전동기의 온도분포에 관한 수치 및 실험적 해석
윤명근,고상근,한송엽,이양수,Yun, Myeong-Geun,Go, Sang-Geun,Han, Song-Yeop,Lee, Yang-Su 대한기계학회 1997 大韓機械學會論文集B Vol.21 No.3
We studied the temperature distribution and heat transfer characteristics of TEFC induction motor with thermal network program for more efficient design and better cooling performance of it. We knew the characteristics and the windage loss of outer cooling fan from fan test experiments. Frame axial and peripheral heat transfer coefficients and endwinding heat transfer coefficient were measured by various model experiments and then, compared with other experimental results. Frame was the main heat transfer surface, load-side and fan-side surface were not thermally symmetric from the heat flux distribution analysis. Steady and unsteady temperature distributions were measured by real motor experiments. From the results, we knew that rotor surface temperature was higher than coil temperature and the hottest spot in the coil was loadside endwinding outside surface. We compared the simulation results with those of real motor test and the two results showed a good agreement.
이희준,차귀수,이지광,최경달,류경우,한송엽,Lee, Hui-Jun,Cha, Gwi-Su,Lee, Ji-Gwang,Choe, Gyeong-Dal,Ryu, Gyeong-U,Han, Song-Yeop 한국초전도저온공학회 2000 한국초전도저온공학회논문지 Vol.2 No.2
This paper describes the construction and test results of a 10kVA single phase HTS transformer. Double pancake windings with BSCCO-2223 HTS tape and G10-FRP cryostat with room temperature bore are used in the transformer. Two double pancake windings are connected in series to provide 188 turns and other two double pancake windings are connected in parallel to conduct the secondary current of 45.4[A]. Coefficients of the constructed transformer are obtained using the fundamental teats of the transformer. According to the test results, larger leakage reactance than expected is observed due to the bulky core which surrounds the sryostat.