Novel Full-Bridge PWM Resonant Converter: Analysis and Implementation

ABSTRACT

A soft-switching full-bridge converter for renewable energy conversion applications is presented. Phase-shifted full-bridge DC/DC converter with a resonant tank is used to realize zero-voltage switching turn-on for switches and zero-current switching for rectifier diodes within nearly entire load range. Therefore, the switching losses of switches and rectifier diodes are improved. To overcome the drawback of a wide range of switching frequency in the conventional resonant converters, fixed frequency pulse-width modulation is adopted to generate the switching signals and also to regulate the output voltage. The transformer primary and secondary windings are connected in parallel and series, respectively, to reduce the current ratings of transformer primary windings and also balance the primary currents for low input voltage applications. Full-bridge diode rectifier is used to reduce the voltage ratings of rectifier diodes for high output voltage applications. Experiments are provided to verify the theoretical analysis and performance of the proposed circuit.

Keywords:

• converters
• full-bridge converter
• PWM
• phase-shift PWM
• soft switching
• zero-voltage switching

Acknowledgements

This project is partly supported by the National Science Council of Taiwan under Grant NSC 102-2221-E-224 -022 -MY3.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This project is partly supported by the National Science Council of Taiwan [grant number NSC 102-2221-E-224 -022 -MY3].

Notes on contributors

B.R. Lin

Bor-Ren Lin received his BS degree in Electronic Engineering from the National Taiwan University of Science and Technology, Taipei, Taiwan, in 1988, and his MS and PhD degrees in Electrical Engineering from the University of Missouri, Columbia, MO, USA, in 1990 and 1993, respectively. From 1991 to 1993, he was a research assistant with the Power Electronic Research Center, University of Missouri. Since 1993, he has been with the Department of Electrical Engineering, National Yunlin University of Science and Technology, Douliou, Taiwan, where he is currently a distinguished professor. He is an associate editor of the Institution of Engineering and Technology Proceedings – Power Electronics. His current research interests include power-factor correction, multilevel converters, active power filters, and soft-switching converters. He has authored more than 200 published technical journal papers in the area of power electronics. Dr Lin is an associate editor of the IEEE Transactions on Industrial Electronics. He was a recipient of Research Excellence Awards in 2004, 2005, 2007, and 2011 from the College of Engineering and the National Yunlin University of Science and Technology. He received Best Paper Awards from the 2007 and 2011 IEEE Conference on Industrial Electronics and Applications (ICIEA), 2007 Taiwan Power Electronics Conference, 2009 IEEE–Power Electronics and Drive Systems Conference (PEDS), the 2012 Taiwan Electric Power Engineering Conference, and the 2014 IEEE–International Conference on Industrial Technology (ICIT).

E-mail: [email protected]