한국조명전기설비학회:학술대회논문집 (Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference)
- 한국조명전기설비학회 2005년도 학술대회 논문집
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- Pages.377-382
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- 2005
A Novel Soft-Switching PWM DC/DC Converter with DC Rail Series Switch-Parallel Capacitor Edge Resonant Snubber Assisted by High-Frequency Transformer Parasitic Components
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- 이현우 (경남대) ;
- Fathy, Khairy (EESRC, The graduate School of Electrical and Electronics Engineering, Kyungnam University) ;
- Lee, Hyun-Woo (EESRC, The graduate School of Electrical and Electronics Engineering, Kyungnam University) ;
- Nakaoka, Mutsuo (EESRC, The graduate School of Electrical and Electronics Engineering, Kyungnam University)
- 발행 : 2005.11.04
초록
This paper presents two new circuit topologies of DC bus lineside active edge resonant snubber assisted soft-switching PWM full-bridge DC-DC converter acceptable for either utility AC 200V-rms or AC 400V-rms input voltage source. One topology of proposed DC-DC converters is composed of a typical voltage source-fed full-bridge high frequency PWM inverter using DC busline side series power semiconductor switching devices with the aid of a parallel capacitive lossless snubber. All the active power switches in the full-bridge arms and DC busline can achieve ZCS turn-on and ZVS turn-off commutations and the total turn-off switching power losses of all active switches can be reduced for high-frequency switching action. It is proved that the more the switching frequency of full-bridge soft switching inverter increases, the more soft-switching PWM DC-DC converter with a hish frequency transformer link has remarkable advantages for its efficiency and power density as compared with the conventional hard-switching PWM inverter type DC-DC converter
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