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홍순찬(S.C.Hong),강경우(K.W.Kang),정우창(W.C.Jung),황용하(Y.H.Hwang) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
This paper deals with the development of IGBT stacks for cost reduction One stack is consist of 4 IGBTs in parallel. In the high- and mid-power converters, IGBT stacks are more suitable than single IGBTs in the aspects of total cost of semiconductor devices, time for purchasing, maintenance, radiation of heat, size of surge absorber and harmonic filter, frequency characteristics, and etc Problems accompanied by parallel construction are studied and solved Economical efficiency is discussed and field tests with rooky A UPS are carried out to verify the validity of the developed IGBT stacks.
손진욱(J W Sohn),전시영(S Y Jeon),이종석(J S Lee),한호성(H S Han),홍순찬(S C Hong),정영균(Y K Chung) 한국의학교육학회 1990 Korean journal of medical education Vol.2 No.2
The course objective of comprehensive clerkship for senior students is to achieve the ability of actual patient care at their postgraduate practice situations. But there has been a great difficulty in implementation of the course mainly due to the lack of manpower, facilities, understanding objective, and measures for evaluation. So the ad hoc committee engaged in the planning, management, evaluation, and integration of the whole course in 1990 academic year and obtained good results. This is the report of the experiences of the committee.