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전압 전류 혼합구동방식을 적용한 동기정류기형 플라이백 DC-DC 컨버터
李達雨(Darl-Woo Lee),安泰榮(Tae-Young Ahn) 대한전기학회 2006 전기학회논문지 B Vol.55 No.9
This paper presents a new voltage/current mixed method for driving synchronous rectifiers (SR) adapted to the flyback topology. The synchronous rectifier driven by the proposed voltage/current mixed method can operate at a wide load range with high efficiency. The gate voltage of MOSFET in the synchronous rectifier can be easily controlled by changing the ratio of resistors, irrespective of a line and load fluctuation. A 200W (l2V /17 A) prototype converter was built and an efficiency of 93% was measured at l0A load current.
원기식(Ki-Sik Won),이달우(Darl-Woo Lee),안태영(Tae-Young Ahn),김성철(Sung-Cheol Kim),장찬규(Chan-Gyu Jang),김용주(Young-Joo Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper presents a new voltage-current driven method for the synchronous rectifier (SR) in a flyback topology. The proposed synchronous rectifier of voltage-current driven can operate at wide load range with high efficiency. The gate voltage of MOSFET in the synchronous rectifier is easily controlled by resistor ratio. regardless of line and load fluctuation. The 200W (12V/17A) prototype is built and achieve efficiency as high as 90% at 7A, 90.5% at 10A and full load.
1.5V 60A급 VRM의 인덕터 손실 분석에 관한 연구
전현(hyun Jeon),이달우(darl-woo Lee),안태영(tae-young Ahn),최광보(gwang-bo Choi) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
In this paper, to report the experimental results the core losses of VRM inductor. The VRM, that has a output voltage 1.5V, output current 60A, maximum power of 90W. Experimental results verify, the VRM has a almost same data of fast transient response, a efficiency test with high flux and ferrite inductor. A maximum power conversion efficiency of the experimental VRM was measured at 92% within 0.2% load regulation.
전류비교형 동기정류기를 이용한 LLC 공진형 하프브리지 컨버터
이광택(Gwang-Taek Lee),이달우(Darl-Woo Lee),안태영(Tae-Young Ahn),김성철(Sung-Cheol Kim),장찬규(Chan-Gyu Jang),김용주(Young-joo Kim) 전력전자학회 2005 전력전자학술대회 논문집 Vol.- No.-
This paper presents a synchronous rectifier in a LLC half bridge topology. The proposed synchronous rectifier is used to a current driven synchronous rectifier(SR). Voltage driven synchronous rectifier may introduce voltage and current surge during the zero dead times. To solve this problem, we propose to use modified current driven synchronous rectifier. Finally, the prototype is built and comparison on the current and voltage driven synchronous rectifier(SR).