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병렬 컨버터에 의한 스위치모드 승압 정류기의 효율 개선
김윤식,김성환,오세진,이성근,전내석,Kim Yoon Sik,Kim Seong Hwan,Oh Sae Gin,Lee Sung Geun,Jeon Nae Sock 한국마린엔지니어링학회 2005 한국마린엔지니어링학회지 Vol.29 No.2
A new technique for improving the efficiency of single-Phase high-frequency switch-mode boost rectifiers is proposed. This rectifier includes an additional boost converter that parallels the main high-frequency switching device. The additional converter. which is controlled at lower frequencies. bypasses most of the current in the main switch and the high frequency switching loss is greatly reduced accordingly. The rectifier works cooperatively in high efficiency and as if it were a conventional rectifier with one switching device. The proposed scheme is verified by computer simulation using software PSIM.
임현정,양현숙,김건우,백영진,김윤식,이성근,Lim, Hyun-Jung,Yang, Hyun-Suk,Kim, Kun-Woo,Baek, Young-Jin,Kim, Yoon-Sik,Lee, Sung-Geun 한국마린엔지니어링학회 2007 한국마린엔지니어링학회지 Vol.31 No.2
This paper describes the implementation of control and monitoring system of ship's lamps at local area using power line communication method, power line modem(PLM). We design modem, microprocessor interface for electric power control by frequency control and analog to digital signal conversion, lamp device. PLM communication is very economical using existing electric power line unlike RS-232, RS-485 communications. We verify and confirm by experimental work that control and monitor lamp system for ship by an PLM communication.
양현숙(Hyun-Suk Yang),이수헌(Su-Hun Lee),정태선(Tae-Sun Jeong),이성근(Sung-Geun Lee),김윤식(Yoon-Sik Kim) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper describes the improvement of performance of power supply for ship's emergency lighting system(SELS). Proposed system is composed of power factor correction (PFC) circuit, emergency power supply system (EPSS), half bridge(HB) inverter, fluorescent lamp(FL) starting circuit and microprocessor control system. Experimental works using proposed system confirm that speedy and stable power to be supplied when main power source cut-off, compared with conventional relay type, and control power factor up to 97.5[%] and input power up to 35.0[%] by adjusting of pulse frequency of the HB inverter.