Full-Bridge ZVS-PWM Hybrid Switched-Capacitor Isolated DC-DC Converter


  • Anderson Alves Federal University of Santa Catarina (UFSC), Florianópolis - Santa Catarina, Brazil
  • Ivo Barbi Federal University of Santa Catarina (UFSC), Florianópolis - Santa Catarina, Brazil




Full-bridge ZVS-PWM converter, Hybrid Converter, Isolated DC-DC converter, Ladder cell, Switched-capacitor converter, Zero-Voltage-Switching


This paper presents a new hybrid switched-capacitor (HSC) isolated DC-DC converter topology generated from the integration of the ladder switching cell with the full-bridge ZVS-PWM converter. This new topology reduces the voltage stress on the switches and other components on the primary side of the transformer to half of the bus voltage, spontaneously equalizes the voltage in the divider capacitors and presents zero-voltage-switching (ZVS) in all switches for a wide load range. The principle of operation, static gain, current stress in the power semiconductors, and commutation analysis are presented in this paper. A theoretical and experimental comparative analysis of the new topology with the TL-NPC converter is also performed. Experimental results with a laboratory prototype with 2 kW rated power, 800 V input voltage, 60 V output voltage and 100 kHz switching frequency show a maximum efficiency of 97.12% for the HSC converter against 96.49% for the TL-NPC converter.


Download data is not yet available.

Author Biographies

Anderson Alves, Federal University of Santa Catarina (UFSC), Florianópolis - Santa Catarina, Brazil

was born in Florianópolis, Brazil. He received B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil, in 1999 and 2002, respectively.

He worked as a researcher for Whirlpool Latin America group, Joinville, Brazil, from 2002 to 2012 and 2013 to 2015. Since 2016 he has been a Professor with the Department of Electronics, Federal Institute of Santa Catarina (IFSC), Florianópolis, SC, Brazil.

He is currently a PhD student in Electrical Engineering at UFSC, in the Power Electronics and Electrical Drives area.

Ivo Barbi, Federal University of Santa Catarina (UFSC), Florianópolis - Santa Catarina, Brazil

was born in Gaspar, Brazil. He received B.S. and M.S. degrees in electrical engineering from the Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil, in 1973 and 1976, respectively, and a Dr.Ing. degree in electrical engineering from the Institut National Polytechnique de Toulouse (INPT), Toulouse, France, in 1979.

He founded the Brazilian Power Electronics Society (SOBRAEP), the Brazilian Power Electronics Conference (COBEP) in 1990, and the Brazilian Power Electronics and Renewable Energy Institute (IBEPE) in 2016. He is currently a researcher with the Solar Energy Research Center and a Professor Emeritus in electrical engineering with UFSC. He served as an Associate Editor for the IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS and the IEEE TRANSACTIONS ON POWER ELECTRONICS for several years.

Prof. Barbi received the 2020 IEEE William E. Newell Power Electronics Award.


J. -I. Itoh, R. Iso and H. Watanabe, "Voltage Unbalance Compensation Method with Zero Voltage Switching for Series Connected Switching Devices," 2019 10th International Conference on Power Electronics and ECCE Asia (ICPE 2019 - ECCE Asia), pp. 3008-3014,May 2019. https://doi.org/10.23919/ICPE2019-ECCEAsia42246.2019.8796871

Y. Shi, S. Shao, X. Wang, W. Cui and J. Zhang, "Series-Connected Power Devices in a CLLC Resonant Converter for DC Transformer Applications," 2021 IEEE 1st International Power Electronics and Application Symposium (PEAS), pp. 1-6, November 2021. https://doi.org/10.1109/PEAS53589.2021.9628875

W. Chen, G. Wang, X. Ruan, W. Jiang and W. Gu, "Wireless Input-Voltage-Sharing Control Strategy for Input-Series Output-Parallel (ISOP) System Based on Positive Output-Voltage Gradient Method," in IEEE Transactions on Industrial Electronics, vol. 61, no. 11, pp. 6022-6030, November 2014. https://doi.org/10.1109/TIE.2014.2308147

G. Daoud, E. Hassan Aboadla, S. Khan, S. Faiz Ahmed and M. Tohtayong, "Input-series output-parallel full-bridge DC-DC converter for high power applications," 2017 4th IEEE International Conference on Engineering Technologies and Applied Sciences (ICETAS), pp. 1-6, November-December 2017. https://doi.org/10.1109/ICETAS.2017.8277902

J. R. Pinheiro and I. Barbi, "The three-level ZVS-PWM DC-to-DC converter," in IEEE Transactions on Power Electronics, vol. 8, no. 4, pp. 486-492, October 1993. https://doi.org/10.1109/63.261019

S. Kouro et al., "Recent Advances and Industrial Applications of Multilevel Converters," in IEEE Transactions on Industrial Electronics, vol. 57, no. 8, pp. 2553-2580, August 2010. https://doi.org/10.1109/TIE.2010.2049719

M. A. Perez, S. Ceballos, G. Konstantinou, J. Pou and R. P. Aguilera, "Modular Multilevel Converters: Recent Achievements and Challenges," in IEEE Open Journal of the Industrial Electronics Society, vol. 2, pp. 224-239, February 2021. https://doi.org/10.1109/OJIES.2021.3060791

E. Deschamps and I. Barbi, "A comparison among three-level ZVS-PWM isolated DC-to-DC converters," IECON '98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.98CH36200), vol.2, pp. 1024-1029, August-September 1998.

R. P. Zingg, "On the specific on-resistance of high-voltage and power devices," in IEEE Transactions on Electron Devices, vol. 51, no. 3, pp. 492-499, March 2004. https://doi.org/10.1109/TED.2003.822948

T. Umeno, K. Takahashi, I. Oota, F. Ueno and T. Inoue, "New switched-capacitor DC-DC converter with low input current ripple and its hybridization," Proceedings of the 33rd Midwest Symposium on Circuits and Systems, vo l.2, pp. 1091-1094, August 1990.

M. Chen, J. Hu, K. Li and A. Ioinovici, "A new switched-capacitor based hybrid converter with large step-up DC gain and low voltage on its semiconductors," 2016 IEEE International Symposium on Circuits and Systems (ISCAS), pp. 1190-1193, May 2016. https://doi.org/10.1109/ISCAS.2016.7527459

M. V. Soares and Y. R. de Novaes, "MMC Based Hybrid Switched Capacitor DC-DC Converter," in IEEE Open Journal of Power Electronics, vol. 3, pp. 142-152, February 2022. https://doi.org/10.1109/OJPEL.2022.3154726

S. Li, K. M. Smedley, D. R. Caldas and Y. W. Martins, "Hybrid Bidirectional DC-DC Converter With Low Component Counts," in IEEE Transactions on Industry Applications, vol. 54, no. 2, pp. 1573-1582, March-April 2018. https://doi.org/10.1109/TIA.2017.2785760

S. Li, Z. Li, C. Huang, S. Zheng and P. Jia, "A Family of Switched-capacitor-based Hybrid DC-DC Converters with Continuously Adjustable Gain," 2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia), pp. 2341-2346, November-December 2020. https://doi.org/10.1109/IPEMC-ECCEAsia48364.2020.9368111

G. M. Leandro and I. Barbi, "Switched-Capacitor LLC Resonant DC-DC Converter With Switch Peak Voltage of Vin/2," in IEEE Access, vol. 8, pp. 111504-111513, June 2020. https://doi.org/10.1109/ACCESS.2020.3001834

Y. Liu, X. Yang, Y. Wang, H. Tan, T. Q. Zheng and S. Igarashi, "Isolated Resonant Switched Capacitor Converter With Voltage Self-Balancing Ability," in IEEE Transactions on Transportation Electrification, vol. 8, no. 3, pp. 3921-3933, September 2022. https://doi.org/10.1109/TTE.2022.3154093

J. A. Sabate, V. Vlatkovic, R. B. Ridley, F. C. Lee and B. H. Cho, "Design considerations for high-voltage high-power full-bridge zero-voltage-switched PWM converter," Fifth Annual Proceedings on Applied Power Electronics Conference and Exposition, pp. 275-284, March 1990. https://doi.org/10.1109/APEC.1990.66420

R. Redl, N. O. Sokal and L. Balogh, "A novel soft-switching full-bridge DC/DC converter: analysis, design considerations, and experimental results at 1.5 kW, 100 kHz," in IEEE Transactions on Power Electronics, vol. 6, no. 3, pp. 408-418, July 1991. https://doi.org/10.1109/63.85909

I. Barbi and F. Pöttker, Soft Commutation Isolated DC-DC Converters, Springer, 1st ed., Switzerland, 2018 https://doi.org/10.1007/978-3-319-96178-1_1




How to Cite

A. Alves and I. Barbi, “Full-Bridge ZVS-PWM Hybrid Switched-Capacitor Isolated DC-DC Converter”, Eletrônica de Potência, vol. 27, no. 3, pp. 196–207, Jul. 2022.



Original Papers