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박석인(S. Park),한수빈(S. Han),정학근(H. Jeong),정봉만(B. Jung) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper reviews electrodeless lamp technology. The lamp has very long life time but very high cost compared to conventional lamps such as fluorescent lamp. For optimizing the overall system in performance and cost, power supply as well as lamp is very important. First, this paper describes various electrodeless lamps and its market condition. Then, a lot of circuit technology for constructing the power supply is reviewed and circuit characteristics are discussed.
박석인(S. Park),한수빈(S. Han),정학근(H. Jeong),정봉만(B. Jung),유승원(S. Yu),송유진(Y. Song) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.5월
Offline switching power supplies have high voltage and high current switching waveforms that generate Electromagnetic Interference(EMI) in the form of both conducted and radiated emissions. Consequently, all off-line power supplies must be designed to attenuate or suppress EMI emissions below commonly acceptable limits. Electrodeless fluorescent lamp"s ballasts have AC/DC flyback converter, so we must control the EMI emissions.
송유진(Y.J. Song),정봉만(B.M. Jung),한수빈(S.B. Han),정학근(H.G. Jeong),박석인(S.I. Park) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
This paper describes a boost converter cascaded high frequency link direct dc-ac converter suitable for fuel cell power sources. A new multi-loop control for a boost converter to reduce the low frequency input current harmonics drawn from fuel cell is proposed. A new PWM technique for the cycloconverter at the secondary to reject the low order harmonics in the output voltages is presented in detail.
무전극형광램프 ULTRA 150W용 EMI 필터에 대한 연구
박석인(S. Park),한수빈(S. Han),유승원(S. Yu),송유진(Y Song),정학근(H. Jeong),정봉만(B Jung) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월
Offline switching power supplies have high voltage and high current switching waveforms that generate Electromagnetic Interference(EMI) in the form of both conducted and radiated emissions. Consequently, all off-line power supplies must be designed to attenuate or suppress EMI emissions below commonly acceptable limits. Electrodeless fluorescent lamp"s ballasts have AC/DC flyback converter, so we must control the EMI emissions.
송유진(Y.J. Song),박석인(S.I. Park),정학근(H.G. Jeong),한수빈(S.B. Han),정봉만(B.M. Jung) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.11월
This paper describes a boost converter cascaded high frequency link direct dc-ac converter suitable for fuel cell power sources. A new multi-loop control for a boost converter to reduce the low frequency input current harmonics drawn from fuel cell is proposed. A new PWM technique for the cycloconverter at the secondary to reject the low order harmonics in the output voltages is presented in detail.
송유진(Y.J. Song),한수빈(S.B. Han),박석인(S.I Park),정학근(H.G. Jeong),정봉만(B.M. Jung) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.11월
This paper describes a power control scheme for a fuel cell hybrid system. The fuel cell hybrid system consists of a fuel cell system , battery as an auxiliary power source and power converters, where the fuel cell system supplies the power required by a load and charges the battery. In the proposed power control strategy, the power balance between fuel cell and battery is managed properly based on the battery SOC and the power demand to improve the efficiency of fuel cell hybrid system. A dual boost converter with a dead-beat control is hired to control the output power of the fuel cell stack and manage its operation region for improving the performance of fuel cell system.
A Power Control Scheme of a Fuel Cell Hybrid Power Source
Yujin Song(송유진),S. B. Han(한수빈),S. I. Park(박석인),H. G. Jeong(정학근),B. M. Jung(정봉만),G. D. Kim(김규덕),S. W. Yu(유승원) 한국조명·전기설비학회 2008 한국조명·전기설비학회 학술대회논문집 Vol.2008 No.10월
This paper describes a power control scheme to improve the performance of a fuel cell-battery hybrid power source for residential application. The proposed power control scheme includes a power control strategy to control the power flow of the fuel cell hybrid power system and a digital control technique for a front-end dc-dc converter of the fuel cell. The power control strategy enables the fuel cell to operate within the high efficiency region defined by the polarization curve and efficiency curve of the fuel cell. A dual boost converter with digital control is applied as a front-end ed-ed converter to control the fuel cell output power. The digital control technique of the converter employs a moving-average digital filter into its voltage feedback loop to cancel the low frequency harmonic current drawn from the fuel cell and then limits the fuel cell output current to a current limit using a predictive current limiter to keep the fuel cell operation within the high efficiency region as well as to minimize the fuel cell oxygen starvation.
양방향 풀-브릿지 DC-DC 컨버터를 위한 새로운 소프트 스위칭 기법
송유진(Y.J. Song),박석인(S.I. Park),정학근(H.G. Jeong),한수빈(S.B. Han),정봉만(B.M. Jung) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.11월
This paper proposes a new soft switching technique for a phase-shift controlled bi-directional DC-DC converter. The described converter employs a low profile high frequency transformer and two active full-bridge converters for bidirectional power flow capability. A new soft switching technique is proposed, which guarantees soft switching over wide range (no load to full load) without any additional circuit components. In the proposed switching scheme, the switch pairs in the diagonal position of the converter each are turned on/off simultaneously by the switching signals with a variable duty ratio depending on the phase shift amount, and the converter is operated without freewheeling interval.