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Analysis and Design of a Novel Active Soft Switched Phase-Shifted Full Bridge Converter
This paper proposes an active soft-switching circuit for bridge converters aiming to improve the power conversion efficiency. The proposed circuit achieves loss-less switching for both main and auxiliary switches without increasing the main switch current/voltage rating. A winding coupled to the primary of power transformer ensures ZCS for the auxiliary switches during their turn-off. A 350 W, 100 kHz phase shifted full bridge (PSFB) converter is built to validate the analysis and design. Theoretical loss calculations for proposed circuit is presented. The proposed circuit is compared with passive soft switched PSFB in terms of efficiency and loss in duty cycle.
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[1] Sabate, J.A.; Vlatkovic, V.; Ridley, R.B.; Lee, F.C.; Cho, B.H.; , "Design considerations for high-voltage high-power full-bridge zero-voltageswitched PWM converter," Applied Power Electronics Conference and Exposition, 1990. APEC -90, Conference Proceedings 1990., Fifth Annual , vol., no., pp.275-284, 11-16 March 1990.
[2] Mweene, L.H.; Wright, C.A.; Schlecht, M.F.; , "A 1 kW 500 kHz frontend converter for a distributed power supply system," Power Electronics, IEEE Transactions on , vol.6, no.3, pp.398-407, Jul 1991.
[3] Song-Yi Lin; Chern-Lin Chen; , "Analysis and design for RCD clamped snubber used in output rectifier of phase-shift full-bridge ZVS converters," Industrial Electronics, IEEE Transactions on , vol.45, no.2, pp.358-359, Apr 1998.
[4] Moschopoulos, G.; Jain, P.; , "ZVS PWM full-bridge converters with dual auxiliary circuits," Telecommunications Energy Conference, 2000. INTELEC. Twenty-second International , vol., no., pp.574-581, 2000.
[5] Chao Yan; Hongyang Wu; Jianhong Zeng; Ying Jianping; Jingtao Tan; , "A precise ZVS range calculation method for full bridge converter,"Power Electronics Specialist Conference , 2003. PESC -03. 2003 IEEE 34th Annual , vol.4, no., pp. 1832- 1836 vol.4, 15-19 June 2003.
[6] Borage, M.; Tiwari, S.; Bhardwaj, S.; Kotaiah, S.; , "A Full-Bridge DCDC Converter With Zero-Voltage-Switching Over the Entire Conversion Range,"Power Electronics, IEEE Transactions on , vol.23, no.4, pp.1743-1750, July 2008.
[7] Chen Zhao; Xinke Wu; Peipei Meng; Zhaoming Qian; , "Optimum Design Consideration and Implementation of a Novel Synchronous Rectified Soft-Switched Phase-Shift Full-Bridge Converter for Low-Output-Voltage High-Output-Current Applications," Power Electronics, IEEE Transactions on , vol.24, no.2, pp.388-397, Feb. 2009.
[8] Moschopoulos, G.; Jain, P.; , "ZVS PWM full-bridge converters with dual auxiliary circuits," Telecommunications Energy Conference, 2000. INTELEC. Twenty-second International , vol., no., pp.574-581, 2000.
[9] Cho, J.G.; Sabate, J.A.; Lee, F.C.; , "Novel full bridge zero-voltagetransition PWM DC/DC converter for high power applications," Applied Power Electronics Conference and Exposition, 1994. APEC -94. Conference Proceedings 1994., Ninth Annual , vol., no., pp.143-149 vol.1, 13-17 Feb 1994.
[10] Moschopoulos, G.; Jain, P.; , "A PWM full-bridge converter with load independent soft-switching capability," Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE , vol.1, no., pp.79-85 vol.1, 2000.
[11] Ordonez, M.; Quaicoe, J.E.; , "Soft-Switching Techniques for Efficiency Gains in Full-Bridge Fuel Cell Power Conversion," Power Electronics, IEEE Transactions on , vol.26, no.2, pp.482-492, Feb. 2011.
[12] Mason, A.J.; Tschirhart, D.J.; Jain, P.K.; , "New ZVS Phase Shift Modulated Full-Bridge Converter Topologies With Adaptive Energy Storage for SOFC Application," Power Electronics, IEEE Transactions on , vol.23, no.1, pp.332-342, Jan. 2008.
[13] Lakshminarasamma, N.; Ramanarayanan, V.; , "A Family of Auxiliary Switch ZVS-PWM DCDC Converters With Coupled Inductor," Power Electronics, IEEE Transactions on , vol.22, no.5, pp.2008-2017, Sept. 2007.
[14] Lakshminarasamma, N.; Ramanarayanan, V.; , "A Family of Auxiliary Switch ZVS-PWM DC-DC Converters with Coupled Inductor," IEEE Industrial Electronics, IECON 2006 - 32nd Annual Conference on , vol., no., pp.2660-2665, 6-10 Nov. 2006.
[15] Brahmendra, B.N.; Lakshminarasamma, N.; , "Novel soft transition pushpull converter: Analysis, modeling, design and implementation," IECON 2011 - 37th Annual Conference on IEEE Industrial Electronics Society , vol., no., pp.1486-1491, 7-10 Nov. 2011.
[16] Lakshminarasamma N, V Ramanarayanan, A new family of soft transition converters: Design example and dynamic model. Proceedings of the National Power Electronics Conference.
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