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절연유와 (絶緣油) 프레스보오드를 병용한 절연설계의 실험적 연구
원종수(Jong Soo Won),황희융(Hee Yung Hwang),송기(Kee Song) 대한공업교육학회 1977 대한공업교육학회지 Vol.2 No.1
This study mainly deals with the design method of insulation consisted of oil and pressboard. The main results obtained from this study may be summarizsed as follows. 1. The empirical formula related to oil gap and potential gradient were introduced. The dieleric strength(kV/㎝) of oil decreses in proportion to the oil gap with the rate of t_0^(0.68), where "t_0" means the distance of oil gap. 2. When pressboard sheets are placed equally between the oil-insulated electrodes, the breakdown strength of each oil gap increases. The higher breakdown voltage in insulation design. therefore, can be taken by arranging oil immersed pressboards properly between eletrodes. 3. The formula on testing voltage applicable to the alternative arrangement structure of oil and pressboard was introduced, and it was justified through experiment. 4. The formula showing proper distance between electrodes and no. of pressboard barriers for a specific testing voltage were introduced.
관측자를 이용한 유도전동기 정회전운전의 (定回轉運轉) 최적제어에 관한 연구
원종수(Jong Soo Won),최박열(Bak Yol Chae) 대한공업교육학회 1978 대한공업교육학회지 Vol.3 No.1
This paper deals primarily with the optimal control of the induction motor by observer method. By estimating the external disturbance through observer, the following results was obtained. 1. The optimal control on the constant speed drive of the induction motor was obtained. Moreover, the instantaneous speed variation by the conventional method was also reduced at minimum by introducing the Luenberger`s observer. 2. The variation of the angular velocity (Δω) following the slight load variation (ΔT_L) was completely recovered after passing approximately 10 seconds.