Operation of Resonant DC/DC Converter in the BUCK Operation Regime

Ivars Rankis, Janis Zakis

Abstract


The series resonant DC/DC converter with isolation transformer is investigated. When switching frequency of input inverter bridge is above the resonant one a shortening of the naturally half-waves of current through a L-C resonant circuit takes place resulting in a circulating current through the DC supply source reducing a mean value of supply current and also reducing load voltage in respect to the one at normally resonant case. The main relations for the case with strong voltage supply source are obtained and operation regimes at raised switching frequency investigated using a computer modeling. Some conclusions are made for proper calculation of parameters. It is shown that the shape of the resonant circuit current at raised frequency grows to the triangular one and that asks for proper correction of the expressions obtained for sinusoidal case. Applying qZ input link processes quite differ from observed for the strong supply – arise charging of the capacitors of the link by influence of circulating current and this phenomena impedes to reducing of the load voltage. That qZ link does not allow to create proper regulation of load parameters. 


Keywords:
BRIDGE, capacitor, coil, commutator, frequency, inverter, switch, transformer, transistor

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References


J. C. Rosas-Caro, F. Z. Peng, H. Cha, and C. Rogers, ZSource-Converter-Based Energy-Recycling Zero-Voltage Electronic Loads, IEEE Transactions on Industrial Electronics, vol. 56, no. 12, pp. 4894–4902, Dec., 2009. http://dx.doi.org/10.1109/TIE.2009.2026374

J. Anderson and F. Z. Peng, A Class of Quasi-Z-Source Inverters, in Industry Applications Society Annual Meeting, 2008, pp. 1–7. http://dx.doi.org/10.1109/08IAS.2008.301

L. Yuan, J. Anderson, F. Z. Peng, and L. Dichen, Quasi Z Source Inverter for Photovoltaic Power Generation Systems, in Proc. IEEE APEC 2009, Applied Power Electronics Conference and Exposition, 2009. pp. 918–924. http://dx.doi.org/10.1109/APEC.2009.4802772

N. D. Ludu, Basic operating characteristics of a high-frequency inverter wth capacitive voltage mulltiplier, ZEEE Trans. Industry Applications, vol. IA-14, no. 3, pp. 264–269, May/June, 1978. http://dx.doi.org/10.1109/TIA.1978.4503532

V. T. Ranganathan, P. D. Ziogas, and V. R. Stefanovic, A generalized approach for the steady state analysis of resonant inverters, ZEEE Trans. Industry Applications, vol. 25, no. 2, pp. 326–338, Mar./Apr. 1989. http://dx.doi.org/10.1109/28.25549

V. T. Ranganathan, P. D. Ziogas, and V. R. Stefanovic, A regulated dc-dc voltage source converter using a high-frequency link, IEEE Trans. Industry Applications, vol. IA-18, no. 3, pp. 279–287, May/June 1982. http://dx.doi.org/10.1109/TIA.1982.4504075

R. L. Steigerwald, High-frequency resonant transistor dc-dc converters, ZEEE Trans. Znd. Electron., vol. IE-31, no. 2, pp. 181–191, May, 1984. http://dx.doi.org/10.1109/TIE.1984.350066

A. K. S. Bhat, A Unified Approach for the Steady-State Analysis of Resonant Converters, IEEE Transactions on Industrial Electronics, vol. 38, no. 4, August, 1991. pp. 251–259. http://dx.doi.org/10.1109/41.84018

Kai Xu. A series-parallel resonant topology and new gate drive circuits for low voltage dc to dc converter. Thesis Dep. of Electr. and Comp. Engin., Queen’s University, Kingston, Ontario, Canada. Jan., 2008, pp. 166.

D. Vinnikov, J. Zakis, L. Liivik, I. Rankis, qZS-Based Soft-switching DC/DC Converter with a Series Resonant LC Circuit. Energy saving, power, power audit, vol. 2, no. 8 (114), 2013. pp. 42–50. (in Russian).

J. Zakis, D. Vinnikov, O. Husev and I. Rankis, Dynamic Behaviour of qZS-Based Bi-Directional DC/DC Converter in Supercapacitor Charging Mode, International Sympos. on Power Electron., Electr. Drives, Automation and Motion (SPEEDAM 2012): Conference Publications, Italia, Sorento, 20.–22. June, 2012. pp. 764.–768. http://dx.doi.org/10.1109/SPEEDAM.2012.6264554

I. Rankis, J. Zakis, Investigation of Supercapacitor Bidirectional Power Flow System. Power and Electrical Engineering, Riga, RTU, vol. 30, 2012, pp. 35–40.




DOI: 10.7250/pee.2014.006

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