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전장건(J.G Jeon),조수억(S.E Cho),박노식(N.S Park),박성준(S.J Park),문채주(C.J Moon),권순재(S.J Kwon),김철우(C.U Kim) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
전력 반도체의 방열 특성은 수명 및 소손 과 관계가 있다. 전력 반도체 자체의 열전달 특성 및 전력 반도체가 취부 되는 방열판의 전도, 대류, 방사의 열전달 특성을 고찰하기 위하여 본 논문에서는 실시간으로 방열판의 온도를 관측하여 전력 반도체의 손실을 확인하였고, 프로파일별 히트 싱크 온도 상승 측정 평균 전류와 전류 프로파일과 의 상관 관계를 분석 하여 방열판 최적화 및 히트 싱크 온도 관측 시 히트 싱크의 모델을 제시하였다.
홍정표(J.P. Hong),손정기(J.K. Son),원태현(T.H Won),권순재(S.J. Kwon),홍순일(S.I. Hong),김종달(J.D. Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
Position controls are very important in semiconductor manufacturing devices, machine tools precision measuring instruments, etc. In this paper, a novel encoder of digital and analog hybrid type is proposed. It is shown that from this experiment a high-resolution angle measurement device can be designed by a low cost incremental encoder.
홍정표(J.P.Hong),박성준(S.J.Park),원태현(T.H.Won),권순재(S.J.Kwon) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
In a motor driving, the current rate is directly related to the rate of a switching device and in cost reduction, the parallel switching operation is the alternatives because It has the smaller current rate through current 야vision There are many Investigations for the parallel switching operations to equaling the current division However It remains many problems for practical usage The reason is that the switching characteristics are mainly relied on the different saturation voltage of each device etc. and these factors are not altered by circuit designer In order to compensate this problem, a proper resistance is experimently Inserted to the switching device But this method can not be the optimal solution Therefore this paper proposes a new parallel operation which uses a parallel phase winding to remove the traditional effect of switching device such as saturation voltage according to the division of current Also the reliable and stable driving is Improved through experiments and the detailed principles
동일한 변압기 용량을 갖는 직렬형 HBML 인버터의 스위칭 신호
이상훈(S.H. Lee),박성준(S-J Park),문채주(C-J Moon),안진우(J-W Ahn),권순재(S-J Kwon),이만형(M-H Lee) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, an efficient switching pattern to equalize the size of transformer is proposed for a multi-level inverter employing cascaded transformers. It is based on the prior selected harmonic elimination PWM(SHEPWM) method. Because the maximum magnetic flux imposed on each transformer becomes exactly equal each to each, all transformers can be designed with the same size regardless of their position. Therefore, identical full-bridge inverter units can be utilized, thus improving modularity and manufacturability. The fundamental idea of the proposed switching pattern is illustrated and then analyzed theoretically. The validity of the proposed switching strategy is verified by experimental results.