Analysis on Hybrid-type Full-bridge DC/DC Converters

International Journal of Computer Trends and Technology (IJCTT)          
© 2016 by IJCTT Journal
Volume-36 Number-4
Year of Publication : 2016
Authors : C. Muniswethasai, B.Purushotham


C. Muniswethasai, B.Purushotham "Analysis on Hybrid-type Full-bridge DC/DC Converters". International Journal of Computer Trends and Technology (IJCTT) V36(4):231-238 June 2016. ISSN:2231-2803. Published by Seventh Sense Research Group.

Abstract -
This paper presents analysis on hybridtype full-bridge dc/dc converters to investigate the high efficiency, high power factor and less THD. Using a hybrid control scheme with a simple circuit structure, the proposed dc/dc converter has a hybrid operation mode. Under a normal input range, the proposed converter operates as a phase-shift fullbridge series resonant converter that provides high efficiency by applying soft switching on all switches and rectifier diodes and reducing conduction losses. When the input is lower than the normal input range, the converter operates as an active-clamp step-up converter that enhances an operation range. Due to the hybrid operation, the proposed converter operates with larger phase shift value than the conventional converters under the normal input range. Full bridge voltage doubler and half bridge voltage doubles are presented to analyze the efficiency. Thus, the proposed converter is capable of being designed to give high power conversion efficiency and its operation range is extended. A 1kW prototype is implemented to confirm the theoretical analysis and validity of the proposed converter.

[1] J. A. sabaté, V.Vlatkovic, R. B. Ridley, F. C. Lee, and B. H. Cho,“Design considerations for high–voltage high-power fullbridge zerovoltage- switching PWM converter,” in Proc. Appl. Power Electron. Conf., 1990, pp. 275-284.
[2] I. O. Lee and G. W. Moon, “Phase-shifted PWM converter with a wide ZVS range and reduced circulating current,” IEEE Trans. Power Electron., vol. 28, no .2, pp. 908-919.Feb. 2013
[3] Y. S. Shin, S. S. Hong, D. J. Kim, D. S. Oh, and S. K. Han, “A new changeable full bridge dc/dc converter for wide input voltage range,” in Proc. 8th Int. Conf. Power Electron.-ECCE Asia, May 2011, pp. 2328- 2335.
[4] P. K. Jain, W., Kang, H. Soin, Y., Xi, “Analysis and design considerations of a load and line independent zero voltage switching full bridge dc/dc converter topology,” IEEE Trans. Power Electron., vol. 17, no .5, pp. 649-657.Sep. 2002.
[5] I. O. Lee and G. W. Moon, “Soft-switching DC/DC converter with a full ZVS range and reduced output filter for high-voltage application,” IEEE Trans. Power Electron, vol. 28, no .1, pp. 112-122.Jan. 2013.
[6] G. N. B. Yadav and N. L. Narasamma, “An active soft switched phase shifted full-bridge dc-dc converter : analysis, modeling, design, and implementation,” IEEE Trans. Power Electron., vol. 29 no. 9, pp. 4538- 4550, Sep. 2014.
[7] Y. Jang, M. M. Jovanović, and Y. –M. Chang, “A new ZVSPWM fullbridge converter,” IEEE Trans. Power Electron., vol. 18 no. 5, pp. 1122- 1129, Sep2003.

Full-bridge circuit, phase-shift Control, active clamp circuit.