Buck Converter의 Switching-Power Loss 감소를 위한 Passive Snubber에 관한 연구
- Title
- Buck Converter의 Switching-Power Loss 감소를 위한 Passive Snubber에 관한 연구
- Authors
- 이상훈
- Date Issued
- 2015
- Publisher
- 포항공과대학교
- Abstract
- This thesis presents a passive snubber for a dc-dc buck converter. The snubber consists of an inductor, two capacitors, and a diode. It reduces the switching power loss significantly by eliminating reverse recovery current of a freewheeling diode and providing zero-current turn on and zero-voltage turn off conditions for a switch, without increasing the voltage stress of a switch. When the snubber was adapted to the conventional dc-dc buck converter and tested at an output power of 200 W, and a switching frequency of 188 kHz, the snubber reduced power loss in a switch by ~ 72.3 %. Thus, the power conversion efficiency increased by ~ 2.8 %. Also, the temperature of a switch decreased by ~ 73 °C and the temperature of a diode decreased by ~ 20 °C. These experimental results show that the proposed passive snubber is useful for improving power conversion efficiency and reliability of conventional dc-dc buck converters operating at a high frequency.
- URI
- http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000001913897
https://oasis.postech.ac.kr/handle/2014.oak/93190
- Article Type
- Thesis
- Files in This Item:
- There are no files associated with this item.
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