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안종필,기완서,오영신 조선대학교 국토개발연구소 1997 국토개발연구 Vol.17 No.1
Recently, a rapid economical development and industrialization require large amount of land of industrial estate and expansion of citis. Therefore the construction of large and deep basements takes place in built up areas where the braced excavation for earth retaining structures causes many problems such as settlement and damages of nearby buildings and underground utilities. This study deals with the behavior of the retaining earth structures and the ground movement around it based on the measuring results which were obtained from the two ground sites. The results of elasto-plastic wall design program involving the effect of lateral flow pressure showed a good agreement with the output of finite difference computer program which covers the behavior of wall as the ground movement around it.
Thermal Analysis of High Speed Induction Motor by Using Lumped-Circuit Parameters
Pil-Wan Han,Jae-Hak Choi,Dong-Jun Kim,Yon-Do Chun,Deok-Je Bang 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.5
This paper deals with the electromagnetic and thermal analysis of high speed induction motor. The induction motor is analyzed by time-varying magnetic finite element method and its thermal analysis is carried out by using analytical lumped-circuit method. Analysis results are compared with the experiment of 29kW high speed motor prototype at 12,000rpm.
Pil-Wan Han,Un-Jae Seo,Jae-Hak Choi,Yon-Do Chun,Dae-Hyun Koo,Ju Lee 대한전기학회 2012 Journal of Electrical Engineering & Technology Vol.7 No.6
The characteristics of an induction motor vary with the number of parameters and the performance relationship between the parameters also is implicit. In case of the induction motor design, we generally should estimate many objective physical quantities in the optimization procedure. In this article, the multi objective design optimization based on genetic algorithm is applied for the three phase induction motor. The efficiency, starting torque, and material cost are selected for the objectives. The validity of the design results is also clarified by comparison between calculated results and measured ones
Thermal Analysis of High Speed Induction Motor by Using Lumped-Circuit Parameters
Han, Pil-Wan,Choi, Jae-Hak,Kim, Dong-Jun,Chun, Yon-Do,Bang, Deok-Je The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.5
This paper deals with the electromagnetic and thermal analysis of high speed induction motor. The induction motor is analyzed by time-varying magnetic finite element method and its thermal analysis is carried out by using analytical lumped-circuit method. Analysis results are compared with the experiment of 29kW high speed motor prototype at 12,000rpm.
유도전동기 효율향상을 위한 알루미늄 및 동 다이캐스팅 적용 시의 동작특성 및 효율 비교연구
한필완(Pil-Wan Han),이주(Ju Lee) 대한전기학회 2012 전기학회논문지 Vol.61 No.1
Copper die casting motor (CDM) has a better design flexibility than aluminium die casting motor (ADM) because of the higher conductivity of copper. However, CDM has an economic and manufacturing weak point due to high copper price and high melting temperature compared to ADM. This paper describes a comparison of the design parameters, specifications, performances and material cost between CDM and ADM of 5.5kW_6P.
Han, Pil-Wan,Seo, Un-Jae,Choi, Jae-Hak,Chun, Yon-Do,Koo, Dae-Hyun,Lee, Ju The Korean Institute of Electrical Engineers 2012 Journal of Electrical Engineering & Technology Vol.7 No.6
The characteristics of an induction motor vary with the number of parameters and the performance relationship between the parameters also is implicit. In case of the induction motor design, we generally should estimate many objective physical quantities in the optimization procedure. In this article, the multi objective design optimization based on genetic algorithm is applied for the three phase induction motor. The efficiency, starting torque, and material cost are selected for the objectives. The validity of the design results is also clarified by comparison between calculated results and measured ones.
유효한 2차원 모델을 이용한 리니어 브레이크 성능 해석
한필완(Han Pil-wan),전연도(Chun Yon-Do),이주(Lee Ju),이관섭(Lee Kwan Seop) 한국철도학회 1998 한국철도학회 학술발표대회논문집 Vol.- No.-
This paper presents the efficient 2-D linear brake analysis model which can compensate the lateral leakage flux by changingng the airgap length and magneto-motive force(MMF). The linkage flux of the 2-D analysis is larger than that of 3-D analysis. This is caused by the assumption in 2-D analysis that geometric and physical values are constant along the perpendicular direction(z) to the analysis region. The equivalent MMF have been calculated from the linkage flux difference between the 2-D and 3-D analyses which are performed at zero velocity. The performances of the linear brake have been analyzed effectively by using the compensated 2-D models without using 3-D FEM.