Title :
Interleaved Active-Clamping Converter With ZVS/ZCS Features
Author :
Hsia, Tsun-Hsiao ; Tsai, Hsien-Yi ; Chen, Dan ; Lee, Martin ; Huang, Chun-Shih
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
In this paper, an interleaved soft-switching dc-to-dc converter configuration is proposed. It consists of two parts: the primary side is a constant-frequency asymmetrical converter with active-clamp feature and the secondary side is a series-resonant tank circuit. The active-clamp circuit recycles the energy stored in the magnetizing inductance of transformer to allow main/auxiliary switches turn-ON at zero-voltage switching and clamps the voltage stress of the main switches. Series-resonant tank circuit employs the transformer leakage inductance and secondary resonant capacitance to achieve zero-current switching of the output diodes. The circuit features constant-frequency operation and soft switching for both the transistors and the diodes. Interleaving operation of this configuration combines the aforementioned benefits and small output capacitor. Theoretical analysis and computer simulation of the converter were given. An 80-KHz 500-W experimental circuit of the proposed converter was demonstrated.
Keywords :
DC-DC power convertors; resonant power convertors; zero current switching; zero voltage switching; ZVS-ZCS features; constant-frequency asymmetrical converter; frequency 80 kHz; interleaved active-clamping converter; interleaved soft-switching dc-to-dc converter configuration; magnetizing inductance; power 500 W; secondary resonant capacitance; series-resonant tank circuit; transformer leakage inductance; voltage stress; zero-current switching; zero-voltage switching; Clamps; Diodes; Inductance; Magnetic resonance; Magnetic switching; RLC circuits; Switches; Switching circuits; Zero current switching; Zero voltage switching; Active-clamping converter; interleave; zero-current switching (ZCS); zero-voltage switching (ZVS);
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2010.2051456