Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Dynamic Characteristics of DC-DC Converters Using Digital Filters

  • Kurokawa, Fujio (Department of Electrical and Electronic Engineering, Nagasaki University) ;
  • Okamatsu, Masashi (Graduate School of Science and Technology, Nagasaki University) ;
  • Ishibashi, Taku (Department of Electrical and Electronic Engineering, Nagasaki University) ;
  • Nishida, Yasuyuki (Department of Electrical, Electronics and Computer Engineering, Chiba Institute of Technology)
  • Published : 2009.05.20
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Abstract

This paper presents the dynamic characteristics of buck and buck-boost dc-dc converters with digital filters. At first, the PID, the minimum phase FIR filter and the IIR filter controls are discussed in the buck dc-dc converter. Comparisons of the dynamic characteristics between the buck and buck-boost converters are then discussed. As a result, it is clarified that the superior dynamic characteristics are realized in the IIR filter method. In the buck converter, the undershoot is less than 2% and the transient time is less than 0.4ms. On the other hand, in the buck-boost converter, the undershoot is about 3%. However, the transient time is approximately over 4ms because the output capacitance is too large to suppress the output voltage ripple in this type of converter.

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References

  1. L. Guo, J. Y. Hung and R. M. Nelms, "PID controller modifications to improve steady-state-- performance of digital controllers for buck and boost converters," Proceedings of Seventeenth Annual IEEE Applied Power Electronics Conference, No.9.3, Dallas, pp. 381-388, March 2002 https://doi.org/10.1109/APEC.2002.989274
  2. M. Nashed, "Design of a digital PWM controller for a soft switching SEPIC converter," Journal of Power Electronics, Vol. 4, No. 3, pp. 152-160, 2004
  3. C. Sudhakarababu and M. Veerachary, "DSP based control of interleaved boost converter," Journal of Power Electronics, Vol. 5, No. 3, pp.180-189, 2005
  4. H. Bae, J. Yang, J. Lee and B. Cho, "Digital state feedback current control using the pole placement technique," Journal of Power Electronics, Vol. 7, No. 3, pp. 213-221, 2007
  5. F. Kurokawa, M. Sasaki, S. Hiura and H. Matsuo, "1MHz high-speed digitally controlled dc-dc converter," IEICE Trans. on Communications, Vol. E87-B, No. 12, pp. 3437-3442, Dec. 2004
  6. H. Hu, V. Yousefzadeh and D. Maksimovic, "Nonlinear control for improved dynamic response of digitally controlled dc-dc converters," IEEE PESC'06 Record, Jeju, pp.2584-2590, June 2006
  7. V. Yousefzadeh, A. Babazadeh, B. Ramachandram and E. Alarcon, "Proximate time-optimal digital control for dc-dc converters," IEEE PESC'07 Record, Orlando, pp.124-130, June 2007
  8. Z. Lukic, C. Blake, S. C. Huerta and A. Prodic, "Universal and fault-tolerant multiphase digital PWM controller IC for high-frequency dc-dc converters," Proc.of IEEE APEC'07, Anaheim, pp. 42-47, Feb. 2007
  9. F. Kurokawa, T. Sato, H. Matsuo and H. Eto, "Output characteristics of dc-dc converter with DSP control," Proceeding of IEEE International Telecommunications and energy conference, Montreal, pp.421-426, Oct. 2002
  10. F. Kurokawa, W. Okamoto and H. Matsuo, "A comparison of steady-state characteristics of buck type dc-dc converter using DSP," IEICE Trans. on Communications, Vol. J89-B, No. 5, pp. 673-681, May 2006
  11. B. Mulgrew, P. Grant and J. Thompson, "Digital signal processing," Macmillan Press Ltd., London, Chap. 5, 1999