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고주파 공진형 인버터 X선 장치의 단시간 출력특성에 관한 연구
이성길(S.K.Lee),임홍우(H.W.Lim),이상일(S.I.Lee),조금배(G.B.Cho),백형래(H.L.Baek) 전력전자학회 1998 전력전자학술대회 논문집 Vol.- No.-
This paper deals with a characteristic of output for high frequency resonant inverter type x-ray generator in short exposure time. In the same tube-voltage, the waveform is stable in long exposure time (200msec) but more decreasing exposure time (50msec), the waveform is distorted. The ripple factor of tube-voltage waveform distorted more and more increase tube-voltage and in this case output is also unstable. High-frequency resonant inverter type X -ray generator using PSU source which introduced in resent is stable tube-voltage waveform and low ripple factor.<br/> <br/>
이강연(K.Y. LEE),최연옥(Y.O. CHOI),백형래(H.L.BAEK),조금배(G.B.CHO),이성길(S.G.LEE),김동휘(D.H.KIM) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper presents experimental operation with utility invertactive 3㎾ photovoltaic generation system. And that describe configuration of utility interactive photovoltaic system which power supply for Demonstration experiment.. The status of photovoltaic generation system comp-onents and interconnection and safety equipment will be summarized. This paper discusses property operation state which system endure division of power for demonstration experiment.
김보현(B.H. Kim),이성길(S.K. Lee),임양수(Y.S. Lim),임홍우(H.W. Lim),조금배(G.B. Cho),백형래(H.L. Baek),정수복(S.B. Chung) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
본 논문에서는 단일 스위치 방식의 포워드컨버터에서 스위칭소자에 직류버스전압의 합, 트랜스포머전압의 반영, 그리고 턴오프 누설 인덕턴스의 스파이크와 같은 스트레스가 가해지므로 이중 스위치 방식의 포워드 컨버터를 설계 및 제작하여 출력특성을 고찰하였다. 제어용 IC는 PFC와 PWM 제어가 하나의 칩에서 이루어 지는 TI사의 UCC28510을 이용하여 21V 및 13.5V의 다중출력 포워드 컨버터 SMPS를 설계 구성하였다.
변문걸(W.J. Bian),박정국(Z.G. Piao),최석조(S.J. Choi),장용해(Y.H. Jang),이성길(S.G. Lee),백형래(H.L. Baek),조금배(G.B. Cho) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
The introduction of high brightness LEDs with white light and monochromatic colors have led to a movement towards specialty and general illumination applications. Because drive circuit of illumination LED has an effect on efficiency and life, research about the drive circuit following LED characteristic is needed. This paper proposed a implementation of the stand-alone LED lighting system using battery from photovoltaic power generation.
박정민(J. M. PARK),임홍우(H. W. LIM),최연옥(Y. O. CHOI),이성길(S. G. LEE),조금배(G. B. CHO),백형래(H. N. BAEK) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
Utility interactive photovoltaic systems is one of the most promising applications of photovoltaic systems. These systems are employed in applications where utility service is already available. In this case, there is no need for battery storage because utility power may be used to supplement photovoltaic systems when the load exceeds available PV generation. The load receives electricity from both the photovoltaic array and the utility inter-tied. In this paper, Principle and operating characteristic of Utility Interconnected Photovoltaic System is presented. For the purpose of optimal utility inter-tied photovoltaic system design and installation. It is that demonstrate throughout the installed 3 PV system respectively, 3 ㎾ utility interconnected residential system.
마이크로프로세서를 이용한 베터리 충전 제어기에 관한 연구
장인혁(I.H Jang),티와리 카필(K.P Tiwari),이성길(S.G Lee),김보현(B.H. Kim),최연옥(Y.O Choi),김동휘(D.H Kim),조금배(G.B. Cho) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
In general the simple structure of battery charging devices are consist of Transformer bridge rectifier, filter Capacitors. However, these structure's charging devices is degradation occurs in the inputs and the transient currents in power conversion devices, leads to distortion of the waveform is rectifiers and converters are composed of two structures, because the power conversion efficiency is also affected. Therefore, this paper shows Atmel, AVR RISC 8-bit micro-processor using the ATmega128 rated voltage and power factor control and the method chosen for the Fed PWM battery charger characteristics through theoretical analysis and experimental results are presented.