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Small Signal Analysis and Control of Snubberless Naturally-Clamped Soft Switching Current-Fed PWM DC/DC Converters

Title:

Small Signal Analysis and Control of Snubberless Naturally-Clamped Soft Switching Current-Fed PWM DC/DC Converters

Khatun, Koyelia (2020) Small Signal Analysis and Control of Snubberless Naturally-Clamped Soft Switching Current-Fed PWM DC/DC Converters. Masters thesis, Concordia University.

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Abstract

Power electronic is the prominent enabling technologies for the uninterruptible power supply (UPS), renewable energy sources, fuel cells, energy storage, electric transportation, electrical appliances and industrial processes. Owing to the challenges to safety, high step-up ratio, galvanic isolation, high-frequency (HF) transformer isolated topologies are introduced. Currentfed topologies offer the merits of high voltage gain, stiff input current and reduced peak currents. The major limitations of current-fed converters is the requirement of snubber circuit to clamp the turn-off voltage spike across the semiconductor devices. Passive snubbers leads to low efficiency as the energy absorbed by the clamping capacitor is dissipated in the resistor. Active-clamping results in better efficiency and simultaneously achieves zero voltage switching (ZVS) of the semiconductor devices. However, it needs floating active device(s) and high value of HF clamp capacitor for the effective voltage clamping. In addition, it suffers from the demerits of high current peak, high circulating current at light load, and reduced voltage gain. A new modulation technique was proposed to modulate secondary side controlled devices to clamp this voltage spike across the primary side devices eliminating the requirement of external snubber circuit. Steady-state analysis, power circuit design and steady-state performance have been reported for such class of snubberless naturally clamped current-fed converters. However, small signal analysis, control design, implementation, and transient/dynamic performance have not been studied yet. The objectives of this thesis are to present small signal analysis, closed loop control design, and demonstrate the transient performance through simulation and experimentation of the snubberless naturally clamped current-fed half-bridge and push-pull dc-dc converter topologies. Small signal model has been derived using state space averaging. Closed loop control design is done employing two-loop average current control. Simulation results using PSIM 11.1.64 are reported to verify the converter performance with the designed controller. Experimental results from a 250W proof-of-concept hardware prototype are demonstrated to show the transient performance of current-fed half-bridge and push-pull dc-dc converter topologies

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Electrical and Computer Engineering
Item Type:Thesis (Masters)
Authors:Khatun, Koyelia
Institution:Concordia University
Degree Name:M.A. Sc.
Program:Electrical and Computer Engineering
Date:5 June 2020
Thesis Supervisor(s):Rathore, Akshay
Keywords:Closed-loop control, current-fed dc-dc converter, naturally clamed, small-signal analysis, soft-switching
ID Code:987016
Deposited By: Koyelia Khatun
Deposited On:30 Jun 2021 15:02
Last Modified:01 Jul 2022 00:00

References:

[1] Fuel Cell Handbook, 5th Edition, EG & G Services Parsons, Inc. Science Applications International Corporation, U. S. Department of Energy, Office of Fossil Energy, National Energy Technology Laboratory, 2000. [2] Fuel Cell Handbook, 7th Edition, EG & G Services Parsons, Inc. Science Applications International Corporation, U. S. Department of Energy, Office of Fossil Energy, National Energy Technology Laboratory , 2004. [3] www.fuelcells.org
[4] A. K. Rathore and P. U.R., "Analysis, Design, and Experimental Results of Novel Snubberless Bidirectional Naturally Clamped ZCS/ZVS Current-Fed Half-Bridge DC/DC Converter for Fuel Cell Vehicles," in IEEE Transactions on Industrial Electronics, [5] P. Xuewei and A. K. Rathore, "Naturally Clamped Zero-Current Commutated Soft-Switching CurrentFed Push–Pull DC/DC Converter: Analysis, Design, and Experimental Results," in IEEE Transactions on Power Electronics, vol. 30, no. 3, pp. 1318-1327, March 2015 [6] P. T. Krein, R. S. Balog and X. Geng, “High-frequency link inverter for fuel cells based on multiple carrier PWM,” IEEE Transactions on Power Electronics, Vol. 19, No. 5, September 2004, pp. 12791288. [7] E. Santi, D. Franzoni, A. Monti, D. Patterson, F. Ponci and N. Barry, “A fuel cell based domestic uninterruptible power supply,” in Proc. IEEE Applied Power Electronics Conference, 2002, pp. 605613. [8] Rathore, A. K., & Prasanna, U. R. (2012, May). Comparison of soft-switching voltage-fed and currentfed bi-directional isolated Dc/Dc converters for fuel cell vehicles. In 2012 IEEE International Symposium on Industrial Electronics (pp. 252-257). IEEE. [9] S. Aso, M. Kizaki, and Y. Nonobe, “Development of hybrid fuel cell vehicles in Toyota,” in Proc. IEEE PCC 2007, pp. 1606-1611. [10] The Ballard website. Available: http://www.ballard.com/fuel-cellapplications/bus.aspx. [11] Y. Konishi, S. Chandhaket, K. Ogura and M. Nakaoka, “Utility-Interactive High-Frequency Flyback Transformer Linked Solar Power Conditioner for renewable Energy Utilizations,” Proceedings IEEE PEDS’01, Vol. 2, 22-25 October 2001, pp. 628-632 [12] T. Shimizu, K. Wada and N. Nakamura, “A Flyback-Type Single Phase Utility Interactive Inverter with Low-Frequency Ripple Current Reduction on the DC Input for an AC Photovoltaic Module System,” Proceedings IEEE PESC’02, Vol. 3, 2002, pp. 1483-1488.
[13] A. K. Rathore, A. K. S. Bhat and R. Oruganti, "A Comparison of Soft-Switched DC-DC Converters for Fuel Cell to Utility Interface Application," 2007 Power Conversion Conference - Nagoya, Nagoya, 2007, pp. 588-594. doi: 10.1109/PCCON.2007.373026 [14] Hongmei Wan, “High efficiency DC-DC converter for EV battery charger using hybrid resonant and PWM technique”, PH.D. dissertation, Dept. Elect. & Comp. Eng., Virginia Polytechnic Institute and State University, 2012. [15] Ranganathan Gurunathan, “Auxiliary Circuit Assisted Soft-switching Techniques and their Application to Power Converters,” PhD Thesis, department of Electrical and Computer Engineering, University of Victoria, Victoria, BC, Canada, 1999. [16] R.L. Steigerwald, “High-Frequency Resonant Transistor DC-DC Converters,” IEEE Trans. on Industrial Electronics, vol. 31, no. 2, May 1984, pp. 181-191. [17] R.L. Steigerwald, “A Comparison of Half-Bridge Resonant Converter Topologies,” IEEE Trans. on Power Electronics, vol. 3, no. 2, April 1988, pp. 174-182. [18] A. K. S. Bhat and M. M. Swamy, “Analysis of Parallel resonant Converter Operating Above Resonance,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 25, July 1989. [19] Rathore, Akshay K., Ashoka KS Bhat, and Ramesh Oruganti, “A comparison of soft-switched DC-DC converters for fuel cell to utility interface application,” in Power Conversion Conference-Nagoya (PCC'07), 2007. pp. 588-594. [20] Kong Xin, “PEM fuel cell stack modeling and design of DC/DC converter for fuel cell energy system”, PH.D. dissertation, Dept. Elect. & Comp. Eng., University of Singapore, 2008. [21] W. Xualyuan and M. Kazerani, “A Novel Maximum Power Point Tracking Method for Photovoltaic Grid-Connected Inverters,” Proceedings IEEE IECON ’03, Vol. 3, 2-6 November 2003, pp. 2332-2337. [22] B. M. T. Ho, S. H. Chung and S. Y. R. Hui, “An Integrated Inverter with maximum Power Tracking for Grid-Connected PV Systems,” Proceedings IEEE APEC’04, Vol. 3, 2004, pp. 1559-1565. [23] B. M. T. Ho and S. H. Chung, “An Integrated Inverter with maximum Power Tracking for GridConnected PV Systems,” IEEE Transactions on Power Electronics, Vol. 20, Issue 4, July 2005, pp. 953-962. [24] M. Calais, J. Myrzik, T. Spooner and V. G. Agelidis, “Inverters for Single-Phase Grid-Connected Photovoltaic Systems-An Overview,” Proceedings IEEE PESC’02, Vol. 2, 2002, pp. 1995-2000. [25] S. B. Kjaer, J. K. Pedersen and F. Blaabjerg, “Power Inverter Topologies for Photovoltaic Modules – A Review,” Proceedings IEEE IAS’02, Vol. 2, 13-18 October 2002, pp 782-788. [26] J. M. A. Myrzik and M. Calais, “String and Module Integrated Inverters for Single-Phase GridConnected Photovoltaic Systems-A Review,” Proceedings of IEEE Power Tech. Conference, Vol. 2, 23-26 June 2003.[27] S. J. Jang, C. Y. Won, B. K. Lee and J. Hur, “Fuel Cell Generation System With a New Active Clamping Current-Fed Half-Bridge Converter,” IEEE Transactions on Energy Conversion, Vol. 22,No. 2, June 2007, pp. 332-340. [28] Ranganathan Gurunathan, “Auxiliary Circuit Assisted Soft-switching Techniques and their Application to Power Converters,” PhD Thesis, department of Electrical and Computer Engineering,University of Victoria, Victoria, BC, Canada, 1999. [29] R.L. Steigerwald, “High-Frequency Resonant Transistor DC-DC Converters,” IEEE Trans. On Industrial Electronics, vol. 31, no. 2, May 1984, pp. 181-191. [30] R.L. Steigerwald, “A Comparison of Half-Bridge Resonant Converter Topologies,” IEEE Trans. On Power Electronics, vol. 3, no. 2, April 1988, pp. 174-182. [31] A. K. S. Bhat and M. M. Swamy, “Analysis of Parallel resonant Converter Operating Above Resonance,” IEEE Transactions on Aerospace and Electronic Systems, Vol. 25, July 1989. [32] J.A. Sabate, and F.C. Lee, “Off-line application of the fixed-frequency clamped-mode series resonant converter,” IEEE Trans. on Power Electronics, vol. 1, no. 1, January 1991, pp. 39-47. [33] P. Xuewei and A. K. Rathore, "Novel Bidirectional Snubberless Naturally Commutated SoftSwitching Current-Fed Full-Bridge Isolated DC/DC Converter for Fuel Cell Vehicles," in IEEE Transactions on Industrial Electronics, vol. 61, no. 5, pp. 2307-2315, May 2014. [34] A. K. Rathore and P. U.R., "Analysis, Design, and Experimental Results of Novel Snubberless Bidirectional Naturally Clamped ZCS/ZVS Current-Fed Half-Bridge DC/DC Converter for Fuel Cell Vehicles," in IEEE Transactions on Industrial Electronics [35] P. Xuewei and A. K. Rathore, "Naturally Clamped Zero-Current Commutated Soft-Switching CurrentFed Push–Pull DC/DC Converter: Analysis, Design, and Experimental Results," in IEEE Transactions on Power Electronics, vol. 30, no. 3, pp. 1318-1327, March 2015 [36] R. Severns and G. Bloom, Modern DC-to-DC Switchmode Power Converter Circuits, Van Nostrand Reinhold Co. New York 1985. [37] Hegazy, Omar, Joeri Van Mierlo, and Philippe Lataire, “Analysis, modeling, and implementation of a
multidevice interleaved DC/DC converter for fuel cell hybrid electric vehicles,” IEEE Trans. Power
Electron., vol.27, no.11, pp 4445-4458, Nov.2012. [38] M. K. Kazimierczuk, Pulse-Width Modulated DC–DC Power Converter. Hoboken, NJ: Wiley, 2008. [39] J. Lai, S. Park, S. Moon and C. L. Chen, "A High-Efficiency 5-kW Soft-Switched Power Conditioning System for Low-Voltage Solid Oxide Fuel Cells," 2007 Power Conversion Conference - Nagoya, Nagoya, 2007, pp. 463-470.doi: 10.1109/PCCON.2007.373008
[40] A. Khaligh and Z. Li, “Battery, Ultracapacitor, FuelCell, and Hybrid Energy Storage Systems for Electric, Hybrid Electric, FuelCell, and Plug-In Hybrid Electric Vehicles: State of the Art,” IEEE Trans. on Vehicular Technology, 2010, pp. 2806-2814. [41] T.-F. Wu, Y.-C. Chen, J.-G. Yang, and C.-L. Kuo, “Isolated bidirectional full-bridge DC–DC converter with a flyback snubber,” IEEE Trans. Power Electron., vol. 25, no. 7, 2010, pp. 1915–1922. [42] Bibian, S., and Jin, H., ‘High performance predictive dead-beat digital controller for DC power supplies’, IEEE Transactions on Power Electronics, 2002, 17 (3), pp. 420-426 [43] Erickson, R., Madigan, M., and Singer, S.: ‘Design of a simple high-power-factor rectifier based on the flyback converter’. in Proc IEEE Applied Power Electronics Conference and Exposition (APEC), March 1990, pp. 792-801. [44] K. R. Sree, A. K. Rathore, E. Breaz and F. Gao, "Soft-Switching Non-Isolated Current-Fed Inverter for PV/Fuel Cell Applications," in IEEE Transactions on Industry Applications, vol. 52, no. 1, pp. 351359, Jan.-Feb. 2016.
[45] Venkatraman, R., and Bhat, A.K.S.: ‘Small-signal analysis of a softswitching, single-stage two-switch AC-to-DC converter’. Proc. IEEE Power Electronics Specialists Conference, June 2001, pp. 1824-1830
[46] K. Fathy, H. W. Lee, T. Mishima, and M. Nakaoka, “Boost half-bridgesingle power stage PWM DCDC converter foe small scale fuel cell stack,” in Proc. IEEE Power Energy Conf., Putra Jaya, Malaysia, 2006, pp. 426–431
[47] H. Kim, C. Yoon, and S. Choi, “An improved current-fed ZVS isolated boost converter for fuel cell applications,” IEEE Trans. Power Electron.,vol. 25, no. 9, pp. 2357–2364, Sep. 2010.
[48] L. Zhu, “A Novel Soft-Commutating Isolated Boost Full-bridge ZVS-PWM DC-DC Converter for Bidirectional High-Power Applications,” IEEE Trans. Power Electron., vol. 21, no. 2, 2006, pp. 422–429.
[49] E. S. Kim, K. Y. Joe, H. Y. Choi, Y. H. Kim, and Y. H. Cho, “An Improved Soft Switching Bidirectional PSPWM FB DC/DC Converter,” in Proc. IEEE IECON, 1998, pp.740 – 743. [50] Bor-Ren Lin and Chao-Hsien Tseng, “Analysis of parallel-connectedasymmetrical soft-switching converter,” IEEE Trans. Ind. Electron., vol. 54, no. 3, pp. 1642-1653, May 2008. [51] J. C. P. Liu, N. K. Poon, B. M. H. Pong and C. K. Tse, “Low output ripple dc-dc converter based on an overlapping dual asymmetric half-bridge topology,” IEEE Trans. Power Electron. vol. 22, no. 5, pp. 1956-1963, Sept. 2007. [52] B. R. Lin, J.J. Chen J.Y. Dong, “Analysis and implementation of an interleaved soft switching converter”, IET Proceedings – Power Electronics, vol. 4, no. 6, pp. 663-673, 2011.
[53] P. Das, B. Laan, S. A. Mousavi, and G. Moschopoulos, “A Nonisolated Bidirectional ZVS-PWM Active Clamped DC–DC Converter,” IEEE Trans. Power Electron. vol. 24, no. 2, pp. 553-558, Feb. 2009. [54] Jong-Jae Lee and Bong-Hwan Kwon, “Active-Clamped Ripple-Free DC/DC Converter Using an Input–Output Coupled Inductor,” IEEE Trans. Ind. Electron., vol. 55, no. 4, pp. 1842-1854, April 2008. [55] G. B. Koo, G. W. Moon and M. J. Youn, “New zero-voltage-switching phase-shift full-bridge converter with low conduction losses,” IEEE Trans. Ind. Electron., vol. 52, no. 1, pp. 28-235, Jan. 2005. R. Steigerwald, “A comparison of half bridge resonant converter Topologies’ in Proceedings of IEEE IAS, pp. 135-144, 1987. [56] R. Steigerwald, “A comparison of half bridge resonant converter Topologies’ in Proceedings of IEEE IAS, pp. 135-144, 1987. [57] K. H. Yi, and G. W. Moon, “Novel two-phase interleaved LLC series resonant converter using a phase of the resonant capacitor,” IEEE Trans. Ind. Electron., vol. 56, no. 5, pp. 1815-1819, May 2009. [58] B. Yang, F. C. Lee, A. J. Zhang and G. Huang, “LLC resonant. converter for front end DC/DC conversion,” in Proc. of IEEE APEC, vol. 2, pp. 1108 – 1112, 2002. [59] D. Fu, Y. Liu, F. C. Lee, and M. Xu, “A novel driving scheme for synhronous rectifiers in LLC resonant converters,” IEEE Trans. Power Electron., vol. 24, no. 5, pp. 1321-1329, October 2009. [60] B. R. Lin and S. F. Wu, “Implementation of a series resonant converter with series–parallel transformers”, IET Proceedings – Power Electronics, vol. 4, no. 8, pp. 919-926, 2011.
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