Analysis, design and derivation of a two-phase converter

In this study, the performances and features of a two-phase converter with low switch voltage stress and its derivative converters are investigated thoroughly. As compared with the traditional boost converter, the voltage stresses of switches and diodes of the two-phase converter are much lower; thus, the switches and diodes with low-voltage ratings can be used, which reduces the conduction losses. Moreover, the switches are not floating, and the input and output terminals have common ground; hence, no isolated driver is required. In addition, by utilising the ampere–second balance principle, the proposed converter can achieve current sharing without any extra control circuit, leading to simple circuit structure. In the two-phase converter, the capacitors are used not only to realise automatic current sharing but also to further improve the voltage gain. In addition, because of the advantages of the two-phase converter, many types of converters are derived from the two-phase converter. Eventually, the operating principles, mathematical deductions and experimental results for the two-phase converter are given to provide its effectiveness.

[1]  Fang Lin Luo,et al.  Analysis of Super-Lift Luo-Converters with capacitor voltage drop , 2008, 2008 3rd IEEE Conference on Industrial Electronics and Applications.

[2]  Jianping Xu,et al.  High-efficiency high step-up PWM resonant converter , 2015 .

[3]  Issa Batarseh,et al.  An overview of the control scheme for distributed power systems , 1996, Southcon/96 Conference Record.

[4]  Sewan Choi,et al.  High step-up interleaved boost converters using voltage multiplier cells , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[5]  Hirotaka Koizumi,et al.  High-step-up dc-dc converter using voltage multiplier cell with ripple free input current , 2013, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society.

[6]  S Dwari,et al.  An Efficient High-Step-Up Interleaved DC–DC Converter With a Common Active Clamp , 2011, IEEE Transactions on Power Electronics.

[7]  K. Shujaee,et al.  Solar Battery Chargers for NiMH Batteries , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[8]  Emmanuel C. Tatakis,et al.  Active voltage clamp in flyback converters operating in CCM mode under wide load variation , 2004, IEEE Transactions on Industrial Electronics.

[9]  Adrian Ioinovici,et al.  Switched-Capacitor/Switched-Inductor Structures for Getting Transformerless Hybrid DC–DC PWM Converters , 2008, IEEE Transactions on Circuits and Systems I: Regular Papers.

[10]  Ebrahim Babaei,et al.  Generalised transformerless ultra step-up DC–DC converter with reduced voltage stress on semiconductors , 2014 .

[11]  Fanghua Zhang,et al.  Capacitor Clamped Current-Sharing Circuit for Multistring LEDs , 2014, IEEE Transactions on Industrial Electronics.

[12]  R. Gules,et al.  Voltage Multiplier Cells Applied to Non-Isolated DC–DC Converters , 2008, IEEE Transactions on Power Electronics.

[13]  Kuo-Ing Hwu,et al.  Applying Differential-Mode Transformer to Current Sharing With Current Ripple Considered , 2011, IEEE Transactions on Industrial Electronics.

[14]  Rong-Jong Wai,et al.  High-efficiency power conversion for low power fuel cell generation system , 2005 .

[15]  Kuo-Ing Hwu,et al.  Voltage Gain Enhancement for a Step-Up Converter Constructed by KY and Buck-Boost Converters , 2014, IEEE Transactions on Industrial Electronics.

[16]  G A L Henn,et al.  Interleaved-Boost Converter With High Voltage Gain , 2010, IEEE Transactions on Power Electronics.

[17]  Peter W. Lehn,et al.  A transformerless modular step-up dc–dc converter for high power applications , 2014 .

[18]  Guo Guoyong,et al.  Design of multi-phase DC-DC converter with averaged current sharing control , 2003, ASICON 2003.

[19]  K.I. Hwu,et al.  A Novel voltage-boosting converter with passive voltage clamping , 2008, 2008 IEEE International Conference on Sustainable Energy Technologies.

[20]  Shelas Sathyan,et al.  Interleaved high step up converter for renewable energy sources , 2013, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society.

[21]  Dylan Dah-Chuan Lu,et al.  Flyback-based high step-up converter with reduced power processing stages , 2012 .

[22]  Adrian Ioinovici,et al.  Step-up DC power supply based on a switched-capacitor circuit , 1995, IEEE Trans. Ind. Electron..

[23]  George C. Verghese,et al.  Analysis and control design of paralleled DC/DC converters with current sharing , 1998 .