Analysis, Design, and Experimentation of an Isolated ZVT Boost Converter With Coupled Inductors

A novel isolated zero-voltage-transition (ZVT) boost converter with coupled inductors is proposed in this paper to satisfy the high power, high step-up, and isolated requirements. In the proposed converter, the input-parallel configuration is adopted to share the large input current and to reduce the conduction losses, while the output-series structure is employed to double the output voltage gain. Consequently, a transformer with a low turns ratio can be applied, which makes the transformer design and optimize easily. Moreover, the active clamp circuits are employed to reduce the switch voltage stress and to recycle the energy stored in the leakage inductance. The ZVT is achieved during the whole switching transition for all the active switches, so the switching losses can be reduced greatly. Furthermore, the diode reverse-recovery problem is partly solved due to the leakage inductance. In addition, the magnetic integration technology is applied to improve the efficiency and to reduce the magnetic component size. Finally, a 48-V input 380-V output 1-kW prototype operating with 100-kHz switching frequency is built and tested to demonstrate the effectiveness of the proposed converter.

[1]  Jung-Min Kwon,et al.  High Step-Up Active-Clamp Converter With Input-Current Doubler and Output-Voltage Doubler for Fuel Cell Power Systems , 2009, IEEE Transactions on Power Electronics.

[2]  Rong-Jong Wai,et al.  High-efficiency power conversion for low power fuel cell generation system , 2005, IEEE Transactions on Power Electronics.

[3]  Rong-Jong Wai,et al.  High step-up converter with coupled-inductor , 2005 .

[4]  Fred C. Lee,et al.  Utilization of an active-clamp circuit to achieve soft switching in flyback converters , 1994, Proceedings of 1994 Power Electronics Specialist Conference - PESC'94.

[5]  B. Lehman,et al.  An integrated magnetic isolated two-inductor boost converter: analysis, design and experimentation , 2005, IEEE Transactions on Power Electronics.

[6]  Fred C. Lee,et al.  High-efficiency, high step-up DC-DC converters , 2003 .

[7]  Sewan Choi,et al.  An Improved Current-Fed ZVS Isolated Boost Converter for Fuel Cell Applications , 2010, IEEE Transactions on Power Electronics.

[8]  Chung-Yuen Won,et al.  Fuel Cell Generation System With a New Active Clamping Current-Fed Half-Bridge Converter , 2007, IEEE Transactions on Energy Conversion.

[9]  Yi Zhao,et al.  A grid-connected PV power system with high step-up ZVT interleaved boost converter , 2008, 2008 34th Annual Conference of IEEE Industrial Electronics.

[10]  E. Adib,et al.  Zero-Voltage Transition Current-Fed Full-Bridge PWM Converter , 2009, IEEE Transactions on Power Electronics.

[11]  Jung-Min Kwon,et al.  High-Efficiency Fuel Cell Power Conditioning System With Input Current Ripple Reduction , 2009, IEEE Transactions on Industrial Electronics.

[12]  Wuhua Li,et al.  Design and Analysis of Isolated ZVT Boost Converters for High-Efficiency and High-Step-Up Applications , 2007, IEEE Transactions on Power Electronics.

[13]  Y. Lembeye,et al.  Implementation and analysis Of large winding ratio transformers , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[14]  Tae-Jin Kim,et al.  High boost converter using voltage multiplier , 2005, 31st Annual Conference of IEEE Industrial Electronics Society, 2005. IECON 2005..

[15]  Quan Li,et al.  A Review of the Single Phase Photovoltaic Module Integrated Converter Topologies With Three Different DC Link Configurations , 2008, IEEE Transactions on Power Electronics.

[16]  Jiann-Fuh Chen,et al.  Study and Implementation of a Current-Fed Full-Bridge Boost DC–DC Converter With Zero-Current Switching for High-Voltage Applications , 2008, IEEE Transactions on Industry Applications.

[17]  Sang-Kyoo Han,et al.  A new active clamping zero-voltage switching PWM current-fed half-bridge converter , 2005, IEEE Transactions on Power Electronics.

[18]  Chia-Yu Tung,et al.  Active-clamp ZVS converter with step-up voltage conversion ratio , 2009, 2009 4th IEEE Conference on Industrial Electronics and Applications.

[19]  Wuhua Li,et al.  A Family of Isolated Interleaved Boost and Buck Converters With Winding-Cross-Coupled Inductors , 2008, IEEE Transactions on Power Electronics.

[20]  Bo Zhang,et al.  A novel type of current-fed push-pull ZVS DC/DC converter , 2009, 2009 IEEE International Symposium on Industrial Electronics.