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ZVS 커패시터를 공진요소로 이용한 Push Pull형 고주파 DC-DC 컨버터의 특성해석
안항목,남승식,김동희,노채균,이달해 한국조명전기설비학회 2000 조명·전기설비학회논문지 Vol.14 No.4
본 논문은 스위칭 소자의 턴.온과 턴.오프시에 발생하는 스위칭 손실을 저감사키기 위해서 ZVS을 이용한 Push Pull형 고주파 DC-DC 컨버터를 제안하고 있다. 직류전원으로 부터 리플이 적은 정전류를 공급하기 위혜 직류리액터가 공진리액터와 접속되어 있어서 부하단락시도 안정된 동작을 할 수 있다는 잇점이 있다. 스위치 양단에 연결된 커패시터$(C_1, C_2)$는 공진요 커패시터와 ZVS용 커패시터로 동시에 사용된다. 제안한 고주파 공전 DC-DC 컨버터의 해석시 정규화 파라미터를 도입하여 범용성 있게 해석 하였으며, 설계시 기초자료가 되는 특성 평가를 하고 있다. 실제 MOSFET를 사용한 실험장치를 제작하여 설함치와 이론치를 비교.검토하여, 이론해석의 정당성을 입증하고 있다. This paper proposes a Push type High Frequency DC-DC Converter using Zero Voltage Switching to reduce turn on and off loss at the switching instants. This paper has a advantage which is able to operating safely in load short, because DC reactor is connected with resonance reactor in order to supply a fixed safely in load short, because DC reactor is connected with resonance reactor in order to supply a fixed current with low ripple from DC power supply. The capacitor $(C_1, C_2)$ connected in switch are a common using as resonance capacitor and ZVS capacitor. The analysis of the proposed high frequency resonance DC-DC converter is generally described by using normallized parameter, and we has evaluated characteristic values which is needed to design a circuit. We conform a rightfulness of theoritical analysis by comparing a theoretical values and experimental values obtained from experiment using MOSFET as switching devices.
고주파 공진 탱크형 DC-DC 컨버터의 특성해석에 관한 연구
황계호,남승식,김동희,노채균,안항목,배상준 嶺南大學校 工業技術硏究所 2002 工業技術硏究所論文集 Vol.30 No.1
In this paper, proposal circuit present that the resonant tank type DC-DC converter consist of L and C resonant tank circuit. Also the capacitor(C_1 C_2) connected in switch are a common using by resonance capacitor and ZVS capacitor. This circuit has an advantage which is able to operating safely in load short, because DC reactor is connected with resonance reactor in order to supply a fixed current with low ripple from DC power supply. The proposed converter can reduce a switching losses, noise, and voltage stress at turn-on and turn-off. The analysis of proposed circuit use normalized paramaters and characteristic estmation which is needed in each step before design is generally described the proposed circuit with the characteristics of average power and average output voltage etc. In this paper, we conform a rightfulness theoretcal analysis by comparing a theoretical valuses and experimental values obtained from experiment using MOSFET as switching devices. Also this converter be operated pattern I and pattern II for the zero voltage switching period.
황계호,남승식,김동희,심광열,안항목 한국조명전기설비학회 2003 조명·전기설비학회논문지 Vol.17 No.1
본 논문은 출력전류를 증가하기 위해서 L과 C를 공진 탱크회로로 구성하는 고주파 공진을 이용한 전류형 고주파 공진 U-U 컨버터를 보여주고 있다. 이 회로구성은 L과 C를 공진 탱크회로로 구성하였고, 스위칭 양단에 커패시터를 삽입하여 공진과 ZVS(Zero Voltage Switching) 커패시터로 동시에 사용하였다. 따라서, 컨버터는 턴ㆍ온, 턴ㆍ오프에서 스위칭 손실과 집음, 전압 스트레스를 줄일 수 있고, U전원 공급으로부터 리플이 적은 일정한 전류를 공급하기 위한 U 리액터는 공진 리액터와 연결되어 있기 때문에 부하 단락시 안정하게 동작하는 장점이 있다. 본 컨버터의 회로해석은 무차원화 파라미터 기법을 도입하여 행하였고, 또한 ZVS영역특성, 출력전력특성, 출력전압특성, 출력전류특성 등 여러 특성평가를 하였다. 여러 특성평가를 바탕으로 설계하였고, 실험을 통한 실험치와 이론치를 비교하여 이론해석의 정당성도 입증하였다. This paper describes that the resonant tank type DC-DC converter consist of reactor and capacitor resonant tank circuit for increased the output current. This circuit configuration is composed of the resonant tank circuit used resonant capacitor and reactor and the capacitor connected in switch are a common using by resonance capacitor and ZVS(Zero Voltage Switching) capacitor. Therefore, the proposed converter can reduce a switching losses, noise, and voltage stress at turn-on and turn-on and has an advantage which is able to operating safely in load short, because DC reactor is connected with resonance reactor in order to supply a fixed current with low ripple from DC power supply. The analysis of proposed circuit uses normalized parameters and characteristic estimation is generally described the proposed circuit with the characteristics of power and output voltage etc. Also, design is based on the characteristic estmations in each step. Hence, We conform a rightfulness theoretical analysis by comparing a theoretical values and experimental values obtained from experiment.
황계호(G.H.Hwang),김동희(D.H.Kim),남승식(S.S.Nam),배상준(S.J.Bae),이봉섭(B.S.Lee),심광열(K.Y.Sim),안항목(H.M.An) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(1)
Recently, Research that output voltage control using several control methods to dc-dc converter that is non -linear system is gone This paper describes control algorithm of the Buck type DC-DC converter using neural network controller<br/> We conform a rightness theoretical analysis by comparing a theoretical values, simulation values obtained from simulation tool and experimental values obtained from experiment the neural network controller got better special characteristic than the hysteresis controller This paper is thought to be applied to several power conversion system use neural network controller<br/>
박재욱(Jae-Uk Park),남승식(Seung-Sik Nam),원재선(Jae-Sun Won),신우철(Woo-Chol Shin),김동희(Dong-Hee Kim),안항목(Hang-Mock Ahn) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
In this paper, electronics ballast using double resonant inverter for 230[W] MHD lamp is designed and implemented, Electronics ballast reduce a turn -on/off loss by using ZVS(Zero Voltage Switching) technic in the double resonant inverter, and when circuit have a analysis, the characteristic evaluations is described generally by using the normalized parameters used numerical analysis. We conform a rightfulness of theoretical analysis by comparing theoretical waveforms and Pspice waveforms and experimental waveforms, double resonant inverter for 250[W] MHD lamp is operated safely.