Active-clamped ZVS current-fed push-pull isolated dc/dc converter for renewable energy conversion applications

作者：Wu, Qunfang^*; Wang, Qin; Xu, Jialin; Xu, Zilong

来源：IET Power Electronics, 2018, 11(2): 373-381.

DOI：10.1049/iet-pel.2017.0144

• zero current switching
• zero voltage switching
• DC-DC power convertors
• switching convertors
• active-clamped ZVS current-fed push-pull isolated dc
• dc converter
• renewable energy conversion applications
• high-voltage conversion ratio
• zero-voltage switching
• zero-current-switching operation
• ZCS
• primary switches
• rectifier diodes
• low-voltage switches
• low on-state resistance
• switching loss
• voltage stress
• transformer turns ratio
• diode reverse-recovery effect

This study introduces a new active-clamped current-fed push-pull dc-dc converter for renewable energy conversion applications. The proposed converter conserves small input current pulsation, high-voltage conversion ratio, zero-voltage switching (ZVS) and zero-current-switching operation for primary switches and rectifier diodes, respectively, over a large load range. Also, the additional active clamping circuit serves to suppress the voltage spike across all primary switches, as well as assists in achieving ZVS operation. So, the low-voltage switches with low on-state resistance can be adopted. These features can reduce switching loss, voltage stress, transformer turns ratio and diode reverse-recovery effect. More importantly, similar characteristics can be obtained with minimised switches compared with the reported converters that enable to reduce the cost and improve the reliability. Detailed steady-state operation, analysis, performance comparison, experimental results and loss breakdown of the proposed converter are fully discussed in this study. Finally, a 520W prototype verifies the theoretical analysis.

• 出版日期2018-2-20
• 单位南京航空航天大学