Zero Voltage Switched Full Bridge Converters for the Battery Charger of Electric Vehicle

Authors: Rizwan Ullah, Abdar Ali, Zahid Ullah

Abstract:

This paper illustrates the study of three isolated zero voltage switched (ZVS) PWM full bridge (FB) converters to charge the high voltage battery in the charger of electric vehicle (EV). EV battery chargers have several challenges such as high efficiency, high reliability, low cost, isolation, and high power density. The cost of magnetic and filter components in the battery charger is reduced when switching frequency is increased. The increase in the switching frequency increases switching losses. ZVS is used to reduce switching losses and to operate the converter in the battery charger at high frequency. The performance of each of the three converters is evaluated on the basis of ZVS range, dead times of the switches, conduction losses of switches, circulating current stress, circulating energy, duty cycle loss, and efficiency. The limitations and merits of each PWM FB converter are reviewed. The converter with broader ZVS range, high efficiency and low switch stresses is selected for battery charger applications in EV.

Keywords: Electric vehicle, PWM FB converter, zero voltage switching, circulating energy, duty cycle loss, battery charger.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1126363

References:

[1] G. Y. Choe, J. S. Kim, B. K. Lee, C.-Y. Won, and T.-W. Lee, “A bi-directional battery charger for electric vehicles using photovoltaic pcs systems,” in 2010 IEEE Vehicle Power and Propulsion Conference, Sept 2010, pp. 1–6.
[2] C. C. Chan and K. T. Chau, “An overview of power electronics in electric vehicles,” IEEE Transactions on Industrial Electronics, vol. 44, no. 1, pp. 3–13, Feb 1997.
[3] I. A. Khan, “Battery chargers for electric and hybrid vehicles,” in Power Electronics in Transportation, 1994.
[Proceedings], Oct 1994, pp. 103–112.
[4] K. Jin, X. Ruan, M. Yang, and M. Xu, “A hybrid fuel cell power system,” IEEE Transactions on Industrial Electronics, vol. 56, no. 4, pp. 1212–1222, April 2009.
[5] H. Aksoy and M. T. Aydemir, “Comparison of zero voltage switching phase-shifted PWM full bridge dc-dc converter topologies,” in 2015 Intl Aegean Conference on Electrical Machines Power Electronics (ACEMP), Sept 2015, pp. 818–824.
[6] M. K. Yang, H. S. Cho, S. J. Lee, and W. Y. Choi, “High-efficiency pulse-width modulated full-bridge converter for low-voltage battery charging applications,” in Transportation Electrification Conference and Expo (ITEC), 2014 IEEE, June 2014, pp. 1–6.
[7] X. Ruan and L. Zhang, “Voltage oscillation elimination in output rectifier diodes in zero-voltage-switching PWM full-bridge converter: An overview,” in 2015 IEEE Energy Conversion Congress and Exposition (ECCE), Sept 2015, pp. 6328–6335.
[8] M. K. Yang, H. S. Cho, S. J. Lee, and W. Y. Choi, “High-efficiency low-cost soft-swtiching DC-DC converter for ev on-board battery chargers,” in 2015 IEEE Applied Power Electronics Conference and Exposition (APEC), March 2015, pp. 2050–2055.
[9] I. O. Lee and G. W. Moon, “Phase-shifted PWM converter with a wide zvs range and reduced circulating current,” IEEE Transactions on Power Electronics, vol. 28, no. 2, pp. 908–919, Feb 2013.
[10] J. C. Maragao-Schmidt and J. Renes-Pinheiro, “Comparative study of full-bridge and double half-bridge converters,” in 2015 CHILEAN Conference on Electrical, Electronics Engineering, Information and Communication Technologies (CHILECON), Oct 2015, pp. 453–460.
[11] A. J. B. Bottion and I. Barbi, “Full bridge zero-voltage-switching PWM DC-DC converter with output capacitive filter,” in 2015 IEEE 13th Brazilian Power Electronics Conference and 1st Southern Power Electronics Conference (COBEP/SPEC), Nov 2015, pp. 1–6.
[12] A. Ali, R. Ullah, and Z. Ullah, “DC-to-DC converters for low-voltage high-power renewable energy systems,” World Academy of Science, Engineering and Technology, International Journal of Electrical, Computer, Energetic, Electronic and Communication Engineering, vol. 9, no. 12, pp. 1299–1304, 2015.
[13] 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,” in Applied Power Electronics Conference and Exposition, 1990. APEC ’90, Conference Proceedings 1990., Fifth Annual, March 1990, pp. 275–284.
[14] X. Ruan, J. Wang, and Q. Chen, “Am improved current-doubler-rectifier ZVS PWM full-bridge converter,” in Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual, vol. 4, 2001, pp. 1749–1754 vol. 4.
[15] Y. Jang, M. M. Jovanovic, and Y.-M. Chang, “A new ZVS-PWM full-bridge converter,” in Telecommunications Energy Conference, 2002. INTELEC. 24th Annual International, 2002, pp. 232–239.
[16] C. Liu, B. Gu, J. S. Lai, M. Wang, Y. Ji, G. Cai, Z. Zhao, C. L. Chen, C. Zheng, and P. Sun, “High-efficiency hybrid full-bridge-half-bridge converter with shared ZVS lagging leg and dual outputs in series,” IEEE Transactions on Power Electronics, vol. 28, no. 2, pp. 849–861, Feb 2013.
[17] Y. Jang and M. M. Jovanovic, “A new family of full-bridge ZVS converters,” in Applied Power Electronics Conference and Exposition, 2003. APEC ’03. Eighteenth Annual IEEE, vol. 2, Feb 2003, pp. 622–628 vol.2.
[18] G. Hua, F. C. Lee, and M. M. Jovanovic, “An improved full-bridge zero-voltage-switched PWM converter using a saturable inductor,” IEEE Transactions on Power Electronics, vol. 8, no. 4, pp. 530–534, Oct 1993.
[19] 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 Power Electronics Specialists Conference, 1990. PESC ’90 Record., 21st Annual IEEE, 1990, pp. 162–172.
[20] R. Redl, L. Balogh, and D. W. Edwards, “Switch transitions in the soft-switching full-bridge PWM phase-shift DC/DC converter: analysis and improvements,” in Telecommunications Energy Conference, INTELEC ’93. 15th International, vol. 1, Sep 1993, pp. 350–357 vol.1.
[21] X. Ruan and F. Liu, “An improved ZVS PWM full-bridge converter with clamping diodes,” in Power Electronics Specialists Conference, 2004. PESC 04. 2004 IEEE 35th Annual, vol. 2, June 2004, pp. 1476–1481 Vol.2.
[22] W. Chen, X. Ruan, Q. Chen, and J. Ge, “A novel clamping diode current reset scheme for ZVS PWM full-bridge converter,” in 2010 IEEE Energy Conversion Congress and Exposition, Sept 2010, pp. 1932–1937.
[23] T. Mishima, K. Akamatsu, and M. Nakaoka, “A high frequency-link secondary-side phase-shifted full-range soft-switching PWM DC-DC converter with ZCS active rectifier for ev battery chargers,” IEEE Transactions on Power Electronics, vol. 28, no. 12, pp. 5758–5773, Dec 2013.