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홍순찬(Soon-Chan Hong),유종걸(Jong-Gul Yoo) 전력전자학회 1999 전력전자학술대회 논문집 Vol.- No.-
This paper studies the scope and text of international standards related to DC supplied electronic ballasts for tubular fluorescent lamps, especially lEC 60925. lEC 60925 specifies general performance requirements for electronic ballasts for use on DC supplies having rated voltages not exceeding 250V associated with tubular fluorescent lamps. The standard specifies also particular performance requirements for DC electronic ballasts for public transport lighting, general lighting, and aircraft lighting
홍순찬,정우창,강경우,유종걸,Hong, Soon-Chang,Jung, Woo-Chong,Kang, Kyoung-Woo,Yoo, Jong-Gul 한국조명전기설비학회 2005 조명·전기설비학회논문지 Vol.19 No.4
본 연구는 AC PDP(Plasma Display Panel)용 멀티레벨 에너지 회수회로에 관한 연구로서, 기존 멀티레벨 구동회로의 문제점을 해결한 새로운 멀티레벨 구동회로를 제안한다. 기존 멀티레벨 구동회로는 Weber회로에서 나타나는 스위칭 소자의 전압 및 전류 스트레스를 개선하였지만 공진 인덕터와 기생 커패시턴스에 의한 기생공진전류가 존재하고 하드스위칭이 발생하며 또한 천이구간이 다소 긴 문제점이 있다. 제안 회로는 사용소자의 수를 줄여 회로를 간단히 하였으며, 기생공진전류를 제거하여 회로 동작의 안정성을 높였다. 또한 CIM(Current Injection Method) 을 사용하여 하드스위칭 문제를 해결하였으며 Vs/2 유지구간을 제거하여 동작주파수를 증가시킬 수 있도록 하였다. 제안 회로의 유용성을 입증하기 위해 모드별로 동작을 해석하였으며, PSpice프로그램을 이용하여 시뮬레이션하고 그 결과를 확인하였다. This paper proposes a novel multi-level energy recovery sustaining driver for AC PDP(Plasma Display Panel), which solves the problems of the conventional multi-level sustaining driver. While the conventional circuit improves the voltage md current stress of the switching elements in Weber circuit not only there are parasitic resonant currents between resonant inductors and parasitic capacitance and hard switching, but also the changing period between 0 and sustain voltage is too long. Comparing the proposed circuit with the conventional circuit, the number of components are reduced and the parasitic resonant currents in resonant inductors are eliminated Moreover the hard switching problem is solved by using CIM(Current Injection Method) and the operating frequency will be high as much as possible by removing Vs/2 sustain period. And the circuit operations of the proposed circuit are analyzed for each mode and the validity is verified by the simulations using PSpice program.
정우창(Woo-Chang Jung),강경우(Kyung-Woo Kang),유종걸(Jong-Gul Yoo),홍순찬(Soon-Chan Hong) 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.11
In this paper, a new energy recovery circuit for AC PDP(Plasma Display Panel) is proposed to decrease a sustain voltage and voltage stress on switching elements. In the proposed circuit, two auxiliary capacitors are connected directly to the power source through switching elements and inductors when ground potential is suppied to the panel. Therefore, the voltage across auxiliary capacitors can be increased by turns over the half of the source voltage. Because the intrinsic capacitance of PDP is charged sufficiently from the auxiliary capacitors, the level of sustain voltage and the voltage stress on the switching devices are decreased. To verify the validity of the proposed energy recovery circuit, computer simulations using PSpice program are carried out
정우창(Woo-Chang Jung),강경우(Kyung-Woo Kang),유종걸(Jong-Gul Yoo),고종선(Jong-Sun Ko),홍순찬(Soon-Chan Hong) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
A new multi-level type energy recovery sustaining driver for AC PDP(Plasma Display Panel) is proposed in this paper. The multi-level driver has been developed to reduce the voltage stress on switching elements. Comparing the proposed driver with the conventional multi-level driver, 4 switching elements, 4 diodes, and two auxiliary capacitors are eliminated in the viewpoint of circuit structure. Moreover, the voltage stress on switching elements is more reduced and the sustain period is extended. To verify the validity of the proposed energy recovery circuit, computer simulations using PSpice program are carried out.
김경원(Kyung-Won Kim),홍순찬(Soon-Chan Hong),유종걸(Jong-Gul Yoo),김상균(Sang-Kyun Kim),박채운(Chae-Woon Park) 전력전자학회 2001 전력전자학술대회 논문집 Vol.2001 No.7
This paper proposes a modified a conduction mode for controlling the output voltage magnitude of three-phase square-wave VSIs with an R-L load. From the viewpoint of both power capacity and switching losses, three-phase square-wave inverters are now used in most high power systems. When the square-wave VSI is driven with a conduction mode to control the magnitude of output voltages, interval over than half period is operated with 180?conduction mode and the other interval with 120?conduction mode. In 120?conduction mode operation, two output terminals are connected to DC supply and the third one remains open. The potential of this open terminal will depend on the load characteristics and is unpredictable except the case of pure resistive loads. To cope this problem, we propose the modified a conduction mode.
AC PDP용 멀티레벨 에너지 회생회로의 개선에 관한 연구
정우창(Woo-Chang Jung),강경우(Kyoung-Woo Kang),정대택,유종걸(Jong-Gul Yoo),고종선(Jong-Sun Ko),홍순찬(Soon-Chan Hong) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
A new multi-level type energy recovery sustaining driver for AC PDP(Plasma Display Panel) is proposed in this paper. The hard switching is eliminated using CIM(Current Injection Method) and thus the voltage stress on switching elements is more reduced. The Vs/2 sustain period is eliminated as much Vs sustain period can be extended. Moreover, Comparing the proposed sustain driver with the conventional multi-level driver, 4 switching elements, and 2 auxiliary capacitors are eliminated in the viewpoint of circuit structure. To verify the validity of the proposed energy recovery circuit, computer simulations using PSpice program are carried out.
α도통모드에 의한 직류전력회생용 인버터 출력전압의 크기 제어
서영민(Young-Min Seo),이주훈(Ju-Hoon Lee),김경원(Kyung-Won Kim),윤인식(In-Sic Yoon),유종걸(Jong-Gul Yoo),윤덕용(Duck-Yong Yoon),홍순찬(Soon-Chan Hong) 전력전자학회 2000 전력전자학술대회 논문집 Vol.2000 No.11
This paper deals with the voltage amplitude control In Inverter systems which can regenerate the excessive DC power from DC bus line to AC supply In substations for traction systems To maintain the magnitude of output fundamental voltage constant in spite of the variation of input DC voltage, inverters are operated in symmetrical α- conduction mode with the range of 120˚< α < 180˚. To match the output voltage of the inverter systems with AC supply voltage, harmonic reduction techniques are also Investigated Computer simulations are carried out to verify the validity of the proposed system.