A novel ZVT/ZCT PWM converter used for solar battery chargers with reduced conduction loss

In this paper a novel structure of a zero- voltage transition PWM boost converter is proposed. The main switch and diode of the converter are turned on and off under zero voltage transition. In addition the auxiliary switch and both diodes operate in ZCT condition. The auxiliary circuit consists of a transformer, a snubber capacitor and two diodes. Without imposing much current stress, the switching loss reduces significantly. So a higher efficiency converter is achieved. The simple structure and a wide range of operating current are the advantages of the proposed converter, which make it useful for solar battery chargers etc. The operation principles of the proposed converter are explained and analyzed. Experimental results of a 1 kW and 250 V output at 200 kHz prototype verify the theoretical conclusions.

[1]  Ivo Barbi,et al.  Novel zero-current-switching PWM converters , 1997, IEEE Trans. Ind. Electron..

[2]  Il-Oun Lee,et al.  Improved zero-voltage-transition (ZVT) boost converter using coupled inductor and low-voltage Zener diode , 2002, Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579).

[3]  Chern-Lin Chen,et al.  Novel ZVT-PWM converters with active snubbers , 1998 .

[4]  Ehsan Adib,et al.  Family of zero-voltage transition pulse width modulation converters with low auxiliary switch voltage stress , 2011 .

[5]  Rae-Young Kim,et al.  A Novel Soft-Switched Auxiliary Resonant Circuit of a PFC ZVT-PWM Boost Converter for an Integrated Multichip Power Module Fabrication , 2013, IEEE Transactions on Industry Applications.

[6]  G. Joos,et al.  A zero voltage transition boost converter employing a soft switching auxiliary circuit with reduced conduction losses , 2004, IEEE Transactions on Power Electronics.

[7]  Guihao Hau,et al.  Novel Zero Voltage-Transition PWM Converter , 1992 .

[8]  Xu Jun,et al.  Research of a ZVT-Boost PFC Circuit Based on SABER , 2013, 2013 Fifth International Conference on Measuring Technology and Mechatronics Automation.

[9]  Fred C. Lee,et al.  Novel zero-voltage-transition PWM converters , 1992 .

[10]  Rong-Jong Wai,et al.  Design of high-efficiency dual-input converter with internal charge circuit , 2014, 2014 IEEE International Conference on Industrial Technology (ICIT).

[11]  T. Senanayake.  Novel zero-current / zero-voltage transition DC-DC converter , 2013, 2013 IEEE 10th International Conference on Power Electronics and Drive Systems (PEDS).

[12]  Humberto Pinheiro,et al.  Family of improved ZVT PWM converters using a self-commutated auxiliary network , 2003 .

[13]  Wuhua Li,et al.  Zero-voltage transition interleaved high step-up converter with built-in transformer , 2011 .

[14]  Ismail Aksoy,et al.  A Novel ZVT-ZCT-PWM Boost Converter , 2014, IEEE Transactions on Power Electronics.

[15]  Xinke Wu,et al.  Analysis and Derivations for a Family ZVS Converter Based on a New Active Clamp ZVS Cell , 2008, IEEE Transactions on Industrial Electronics.