A novel active-clamp zero-voltage-switching buck-boost converter

作者：Pham Phu Hieu; Hsieh, Yao Ching^*; Lin, Jing Yuan; Huang, Bing Siang; Chiu, Huang Jen

来源：International Journal of Circuit Theory and Applications, 2018, 46(4): 868-881.

DOI：10.1002/cta.2441

• buck-boost converter
• duty loss
• zero-voltage switching

An active-clamp zero-voltage-switching (ZVS) buck-boost converter is proposed in this paper to improve the performance of converter in light load condition. By employing a small resonant inductor, the ZVS range of switches could be adjusted to very light load condition. Moreover, 2 clamping capacitors are added in the converter to eliminate the voltage spike on the switches during transition. The operating principle of the proposed converter is analyzed, and the optimal design guide for full range ZVS is also provided. A 60-W output prototype is experimentally built and tested in laboratory to verify the feasibility of proposed converter. The measured results show the critical ZVS operation of power switches at 1 and 0.7-W output power for buck and boost mode, respectively. The peak conversion efficiency is up to 92.3%.

• 出版日期2018-4
• 单位中山大学