DocumentCode :
2796396
Title :
Zero-voltage switching flyback-boost converter with voltage-doubler rectifier for high step-up applications
Author :
Seong, Hyun-Wook ; Kim, Hyoung-Suk ; Park, Ki-Bum ; Moon, Gun-Woo ; Youn, Myung-Joong
Author_Institution :
Dept. of Electr. Eng., KAIST, Daegeon, South Korea
fYear :
2010
fDate :
12-16 Sept. 2010
Firstpage :
823
Lastpage :
829
Abstract :
A zero-voltage switching (ZVS) flyback-boost (FB) converter with a voltage-doubler rectifier (VDR) has been proposed. By combining the common part between a flyback converter and a boost converter as a parallel-input/series-output (PISO) configuration, this proposed circuit can increase a step-up ratio and clamp the surge voltage of switches. The secondary VDR provides a further extended step-up ratio as well as its voltage stress to be clamped. An auxiliary switch instead of a boost diode enables all switches to be turned on under ZVS conditions. The zero-current turn-off of the secondary VDR alleviates its reverse-recovery losses. The operation principles, the theoretical analysis, and the design consideration are investigated. The experimental results from a 250W and 42V-to-400V prototype are shown to verify the proposed scheme.
Keywords :
DC-DC power convertors; rectifying circuits; surge protection; zero voltage switching; boost diode; flyback-boost converter; high step-up applications; parallel-input/series-output configuration; reverse-recovery losses; surge voltage; voltage-doubler rectifier; zero-voltage switching; Capacitors; Converters; Inductors; Rectifiers; Stress; Switches; Zero voltage switching; Step-up ratio; Voltage-doubler rectifier (VDR); Zero-voltage switching (ZVS);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2010 IEEE
Conference_Location :
Atlanta, GA
Print_ISBN :
978-1-4244-5286-6
Electronic_ISBN :
978-1-4244-5287-3
Type :
conf
DOI :
10.1109/ECCE.2010.5617913
Filename :
5617913
Link To Document :
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