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플라이휠 저장 에너지를 이용한 다이나믹 UPS 동작 특성 분석
이기수(K.S. Lee),김중원(J.W. Kim),변우열(W.Y. Byeon),노의철(E.C. Nho),김인동(I.D. Kim),전태원(T.W. Chun),김흥근(H.G. Kim) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.5월
This paper describes a dynamic UPS system with flywheel energy storage element. There are three operating modes of charging, voltage compensation, and UPS. The operating principle of each mode is analyzed and simulated. The simulation results show the validity of the operation of the proposed scheme.
최종선(C.S Choi),전태원(T.W Chun),김지용(S.Y Kim),김흥근(H.K Kim) 전력전자학회 2008 전력전자학술대회 논문집 Vol.- No.-
An inverter with large capacity has been demanded at a factory automation and diffusion of the energy saving work. As the capacity of inverter is larger, the stary inductance has much influence on both the di/dt of IGBT current, and voltage stress across IGBT. Also, the life of the snubber capacitor may be shortened due to overheating of the snubber capacitor. In this paper, a planar busbar which consists of two layers is applied to N700-series inverter in order to minimize stray inductance. The voltage stress across IGBT is changed by both the DC busbar structure and the capacity of snubber capacitor.
인버터 구동 유도전동기의 코일과 턴에서의 전압 분포 연구
권병훈(B.H.Kwon),안정렬(J.R.Ahn),전태원(T.W.Chun),김흥근(H.G.Kim),노의철(E.C.Nho) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
The voltage stress on line-end coil of the stator winding in the induction motor fed by a PWM inverter is analyzed, using the computer model based on multi-conductors transmission line. A method to calculate circuit parameters, especially, capacitance between the turns and ground is proposed. The voltage distributions inside coil at motor terminal depending on dv/dt are investigated through simulation studies.
DTC를 사용한 3레벨 인버터-유도전동기 구동시스템의 토크리플 저감방법
안정렬(J.R. Ahn),전태원(T.W. Chun),이홍희(H.H. Lee),김흥근(H.G. Kim),노의철(E.C. Nho) 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
This paper proposes a simple technique to reduce the torque ripple in the direct torque control(DTC) of induction motor driven by 3-level inverter. In the traditional DTC method, both the sampling time and the measurement time delay of sensor value have much influence on the stator flux ripple as well as torque ripple. The dithering technique where the high frequency triangular wave is added to the torque error component, is applied to the DTC using the 3-level inverter in order to reduce the torque ripples. The performances of the proposed method are verified with simulation results.
정재헌(J.H. Jung),손예(R. Sun),노의철(E.C. Nho),김인동(I.D. Kim),김흥근(H.G. Kim),전태원(T.W. Chun) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
This paper describes a new method for the seamless operation mode transfer of a PCS. The proposed method provides reduced STS turn off time after line fault and smooth mode change between current and voltage control of the PCS. The usefulness of the method is verified through simulations.