Title :
Soft-Switching Bidirectional DC-DC Converter Using a Lossless Active Snubber
Author :
Jae-Won Yang ; Hyun-Lark Do
Author_Institution :
Dept. of Electron. & Inf. Eng., Seoul Nat. Univ. of Sci. & Technol., Seoul, South Korea
Abstract :
A soft-switching bidirectional dc-dc converter using a lossless active snubber is proposed in this paper. In the proposed converter, zero-voltage-switching (ZVS) of main switches is achieved by utilizing an active snubber which consists of auxiliary switches, diodes, an inductor, and a capacitor. Although conduction losses associated with additional components increase, switching losses are significantly reduced due to the ZVS operation of main switches. Therefore, total efficiency is improved. Moreover, there is no reverse-recovery problem of the intrinsic body diodes of the switches. To verify the ZVS of the main switches and efficiency improvement of the proposed bidirectional dc-dc converter, theoretical analysis and experimental results from a 200 W prototype are discussed.
Keywords :
DC-DC power convertors; snubbers; switching convertors; zero voltage switching; ZVS; auxiliary switches; capacitor; conduction losses; inductor; intrinsic body diodes; lossless active snubber; power 200 W; soft-switching bidirectional DC-DC converter; switching losses; zero-voltage-switching; Capacitance; Capacitors; Inductors; Snubbers; Switches; Zero current switching; Zero voltage switching; Bidirectional dc-dc converter; lossless active snubber; zero-voltage-switching;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2013.2285700
