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PCB 캐패시터를 이용한 플라이백 SMPS 출력 리플 저감 대책
김태근(T.G.Kim),정교범(G.B.Chung),이완윤(W.Y.Lee) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
The leakage inductance of the High Frequency Transformer(HFT) in the flyback topology can be used an inductor of the Low Pass Filter(LPF) to reduce ripple and ripple noise in the output voltage. But, the values of leakage inductance and magnetizing inductance in the HFT are within ±20[%] And the operating temperature of the HFT increased by the leakage inductance Therefore, the leakage inductance of the HFT in the flyback topology has minimum and the LPF has non-polarity ceramic capacitor in the output stage. In this paper, the LPF in the flyback topology takes PCB capacitor using double layer of PCB without non-polarity ceramic capacitor Its experimental results show the reduced ripple noise and the reduced ripple in the output stage
반복제어기를 적용한 단상 계통연계형 인버터의 전력품질 개선
김재한(J.H Kim),목형수(H.S Mok),최규하(G.H Choe),이진우(J.W Lee),정교범(G.B Chung),이정민(J.M Lee),조영훈(Y.H Cho) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
In recent years, installation of the new and renewable energy system is rapidly increasing. Because the new and renewable energy system is a practical distributed generation system to save energy resources and to keep environments clean. Conventional single-phase utility interactive inverter controls output current by using PI current controller. However, this method is insufficient to suppress harmonic current resulted from nonlinear loads in grid line. In this paper, in order to suppress periodic waveform distortion and improve THD(Total Harmonic Distortion), new type current controller added a parallel repetitive controller is proposed and then performance of the proposed controller was verified with computer simulation.
김영기(Y.K. KIM),최승철(SC. Choi),이진우(J.W. Lee),정교범(G.B. Chung),목형수(H.S. Mok) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
본 논문에서는 전기자전거용 BLDC를 구동할 수 있는 구동 제어시스템을 설계하였으며, BLDC 전동기와 구동원리에 대해 특성을 파악하였다. 제어보드는 TI사의 TMS320F2808을 이용하여 6-스텝 인버터를 구동하였으며, PI제어를 적용하여 전류 제어를 통해 전기자전거용 BLDC 구동장치를 구현 하였다.