Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Design Methodology for Optimal Phase-Shift Modulation of Non-Inverting Buck-Boost Converters

  • Shi, Bingqing (Department of Electrical Engineering, Tsinghua University) ;
  • Zhao, Zhengming (Department of Electrical Engineering, Tsinghua University) ;
  • Li, Kai (School of Electrical Engineering, Beijing Jiaotong University) ;
  • Feng, Gaohui (Department of Electrical Engineering, Tsinghua University) ;
  • Ji, Shiqi (Department of Electrical Engineering and Computer Science, University of Tennessee) ;
  • Zhou, Jiayue (Department of Electrical Engineering, Tsinghua University)
  • Received : 2019.01.02
  • Accepted : 2019.05.14
  • Published : 2019.09.20
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Abstract

The non-inverting buck-boost converter (NIBB) is a step-up and step-down DC-DC converter suitable for wide-input-voltage-range applications. However, when the input voltage is close to the output voltage, the NIBB needs to operate in the buck-boost mode, causing a significant efficiency reduction since all four switches operates in the PWM mode. Considering both the current stress limitation and the efficiency optimization, a novel design methodology for the optimal phase-shift modulation of a NIBB in the buck-boost mode is proposed in this paper. Since the four switches in the NIBB form two bridges, the shifted phase between the two bridges can serve as an extra degree of freedom for performance optimization. With general phase-shift modulation, the analytic current expressions for every duty ratio, shifted phase and input voltage are derived. Then with the two key factors in the NIBB, the converter efficiency and the switch current stress, taken into account, an objective function with constraints is derived. By optimizing the derived objective function over the full input voltage range, an offline design methodology for the optimal modulation scheme is proposed for efficiency optimization on the premise of current stress limitation. Finally, the designed optimal modulation scheme is implemented on a DSPs and the design methodology is verified with experimental results on a 300V-1.5kW NIBB prototype.

Keywords

References

  1. M. Kasper, D. Bortis, and J. W. Kolar, “Classification and comparative evaluation of PV panel-integrated DC-DC converter concepts,” IEEE Trans. Power Electron., Vol. 29, No. 5, pp. 2511-2526, May 2014. https://doi.org/10.1109/TPEL.2013.2273399
  2. B. Sahu and G. A. Rincon-Mora, “A low voltage, dynamic, noninverting, synchronous buck-boost converter for portable applications,” IEEE Trans. Power Electron., Vol. 19, No. 2, pp. 443-452, Mar. 2004. https://doi.org/10.1109/TPEL.2003.823196
  3. M. Kasper, D. Bortis, and J. W. Kolar, “Classification and comparative evaluation of PV panel-integrated DC-DC converter concepts,” IEEE Trans. Power Electron., Vol. 29, No. 5, pp. 2511-2526, May 2014. https://doi.org/10.1109/TPEL.2013.2273399
  4. L. Callegaro, M. Ciobotaru, V. G. Agelidis, and E. Turano, "A solution for the gain discontinuity issue of the noninverting buck-boost converter," in Proc. IEEE Annual Conference of the IEEE Industrial Electronics Society, pp. 1245-1250, 2016.
  5. Q. Gu, L. Yuan, J. Nie, J. Sun, and Z. Zhao, “Current stress minimization of dual active bridge DC-DC converter within the whole operating range,” IEEE J. Emerg. Sel. Topics in Power Electron., Vol. 7, No. 1, pp. 129-142, Mar. 2019. https://doi.org/10.1109/JESTPE.2018.2886459
  6. P. C. Huang, W. Q. Wu, H. H. Ho, and K. H. Chen, “Hybrid buck-boost feedforward and reduced average inductor current techniques in fast line transient and high-efficiency buck-boost converter,” IEEE Trans. Power Electron., Vol. 25, No. 3, pp. 719-730, Mar. 2010. https://doi.org/10.1109/TPEL.2009.2031803
  7. X. Ren, X. Ruan, H. Qian, M. Li, and Q. Chen, “Threemode dual-frequency two-edge modulation scheme for four-switch buck-boost converter,” IEEE Trans. Power Electron., Vol. 24, No. 2, pp. 499-509, Feb. 2009. https://doi.org/10.1109/TPEL.2008.2005578
  8. D. Hu, Z. Qi, Y. Tang, and Y. He, "Research on fractional order PID controller applied to PEMFC pre-stage power conversion," in Proc. IEEE Chinese Control And Decision Conference (CCDC), pp. 1015-1020, 2017.
  9. M. Orellana, S. Petibon, B. Estibals, and C. Alonso, "Four switch buck-boost converter for photovoltaic DC-DC power applications," in Proc. IEEE Annual Conference on IEEE Industrial Electronics Society, pp. 469-474, 2010.
  10. C. Yao, X. Ruan, W. Cao, and P. Chen, “A two-mode control scheme with input voltage feed-forward for the two-switch buck-boost DC-DC converter,” IEEE Trans. Power Electron., Vol. 29, No. 4, pp. 2037-2048, Apr. 2014. https://doi.org/10.1109/TPEL.2013.2270014
  11. P. Rajarshi and D. Maksimovic, "Smooth transition and ripple reduction in 4-switch non-inverting buck-boost power converter for WCDMA RF power amplifier," in Proc. IEEE International Symposium on Circuits and Systems, pp. 3266-3269, 2008.
  12. Y. J. Lee, A. Khaligh, and A. Emadi, “A compensation technique for smooth transitions in a noninverting buck- boost converter,” IEEE Trans. Power Electron., Vol. 24, No. 4, pp. 1002-1015, Apr. 2009. https://doi.org/10.1109/TPEL.2008.2010044
  13. C. L. Wei, C. H. Chen, K. C. Wu, and I. T. Ko, “Design of an average-current-mode noninverting buck-boost DC-DC converter with reduced switching and conduction losses,” IEEE Trans. Power Electron., Vol. 27, No. 12, pp. 4934-4943, Dec. 2012. https://doi.org/10.1109/TPEL.2012.2193144
  14. Y. M. Chen, Y. L. Chen, and C. W. Chen, "Progressive smooth transition for four-switch buck-boost converter in photovoltaic applications," in Proc. IEEE Energy Conversion Congress and Exposition, pp. 3620-3625, 2011.
  15. R. Gurunathan and A. K. S. Bhat, “Zero-voltage switching DC link single-phase pulsewidth-modulated voltage source inverter,” IEEE Trans. Power Electron., Vol. 22, No. 5, pp. 1610-1618, Sep. 2007. https://doi.org/10.1109/TPEL.2007.904169
  16. F. R. Dijkhuizen and J. L. Duarte, "Pulse commutation in nested-cell converters through auxiliary resonant pole concepts," in Proc. IEEE Industry Applications Conference, pp. 1731-1738, 2001.
  17. C. E. Kim, S. K. Han, K. H. Yi, W. J. , and G. W. Moon, "A new high efficiency ZVZCS bi-directional DC/DC converter for 42V power system of HEVs," in Proc. IEEE Power Electronics Specialists Conference, pp. 792-797, 2005.
  18. Z. Yu, H. Kapels, and K. F. Hoffmann, "A novel control concept for high-efficiency power conversion with the bidirectional non-inverting buck-boost converter," in European Conference on Power Electronics and Applications, pp. 1-10, 2016.
  19. S. Waffler and J. W. Kolar, “A novel low-loss modulation strategy for high-power bidirectional buck boost converters,” IEEE Trans. Power Electron., Vol. 24, No. 6, pp. 1589-1599, Jun. 2009. https://doi.org/10.1109/TPEL.2009.2015881
  20. W. Chen, J. N. He, and T. D. Hong, "Design considerations of inductor for 500 kVA PV inverter based on Euro efficiency," in Proc. IEEE Power Electronics for Distributed Generation Systems (PEDG), pp. 1-4, 2014.
  21. A. Brockmeyer, "Experimental evaluation of the influence of DC-premagnetization on the properties of power electronic ferrites," in Proc. IEEE Applied Power Electronics Conference and Exposition, pp. 454-460, 1996.
  22. A. Brockmeyer and J. Paulus-Neues, "Frequency dependence of the ferrite-loss increase caused by premagnetization," in Proc. IEEE Applied Power Electronics Conference and Exposition, pp. 375-380, 1997.