Study on high efficient isolated DC/DC converters with hold-up time compensation technique = Hold-Up Time 보상 기능을 가진 고효율 절연형 DC/DC 컨버터에 관한 연구

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Global oil price has been continuously increased in last few decades and greenhouse effect caused by carbon dioxide emission becomes getting more serious in these days. It causes climate changes in all around the world and many countries are currently suffered from unusual natural disasters, hurricane, tsunami, flood, drought …and so on. To solve this problem or slow down the process of climate change, many researches have been performed to improve the efficiency over the entire industries and special attention is drawn to transportation industry and IT industry which are major oil consuming industries. Especially, IT industry shows rapid growth in recent years followed by the development of internet infrastructure and it becomes the second largest oil consuming industry in these days. Many regulations have been made to restrict the oil consumption in IT devices and they set up energy efficiency standards for every IT device to promote the researches for the products with high efficiency. In this dissertation, three different topologies will be presented for high efficiency IT devices. Each topology is focusing on three different power levels, high power level, middle power level and low power level. High power level represents beyond 1kW level, middle power level indicates between 400W and 1kW power level, and low power level shows under 400W power level. Also the researches include hold-up time compensation technique which becomes the essential requirement in IT devices. The meaning of hold-up time is explained in main section and high efficient topologies having hold-up time compensation technique is proposed. The researches for high power and middle power levels are targeting on server power system specification and those for low power level are targeting on 75W LED TV specifications. The two stage type power structure is adopted as the basic power conversion structure. This system composed of PFC stage and DC/DC stage. The output voltage is regulated in...
Advisors
Moon, Gun-Wooresearcher문건우
Description
한국과학기술원 : 전기및전자공학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
513081/325007  / 020095159
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전기및전자공학과, 2013.2, [ vi, 81 p. ]

Keywords

DC/DC converter; soft-switching converter; hold-up time; zero-voltage switching; DC/DC 컨버터; 소프트 스위칭 컨버터; 홀드-업 타임; 영전압 스위칭; 영전류 스위칭; zero-current switching

URI
http://hdl.handle.net/10203/180134
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=513081&flag=dissertation
Appears in Collection
EE-Theses_Ph.D.(박사논문)
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