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연료전지 시스템용 SEPIC-Flyback Converter의 설계 및 제어
강구삼(Ku-Sam Kang),장수진(Su-Jin Jang),이태원(Tae-Won Lee),김수석(Soo-Seok Kim),원충연(Chung-Yuen Won) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.5월
In this paper, design and control of the novel SEPIC-Flyback converter(SF converter) is developed as a possible converter for fuel cell system. This output characteristic of SF converter is similar to Buck-Boost converter in that it can step-up or step-down the voltage. With the small signal equivalent circuit modeling of SF converter, control-to-output transfer function is obtained. SF converter couples up the inductive type converter to capacitive type converter with one transformer, which has less ripple current than its respective one does. To verify the validity of the proposed converter, 500W, 100kHz converter is designed and tested. ZVS switching and active clamping are also tested in practice.
MOLD와 알루미늄 PUR Hot-melt 시 LCD 무라 방지를 위한 압착지그 최적화 설계
한희주(Hee-Joo Han),강구삼(Ku-Sam Kang),김현영(Hyeon-Yeong Kim),김용기(Yong-Ki Kim) 한국자동차공학회 2024 한국자동차공학회 부문종합 학술대회 Vol.2024 No.6
Recently, there has been increasing pressure to slim down automotive electronic components in terms of design, which greatly improves fitment in vehicles. Accordingly, interest in PUR hot-melt, which can affect the size and design of vehicle display screens, is increasing. In addition, in order to effectively manage the heat generated inside the display, the exterior of the product is made of aluminum, so there are cases where MOLD and aluminum are pressed together using PUR hot-melt. At this time, bending of the MOLD component occurs, and the stress of the bending causes the LCD mura problem. Therefore, this paper proposes a hot-melt pressing jig optimization design method to identify and prevent LCD mura problems in advance during pressing after hot-melt application. As a result, it is expected to shorten the component development period and minimize quality problems.