Dynamic Modeling and Closed-Loop Control of a Tapped Inductor Buck Converter

Authors

  • Siripan Trakuldit Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand https://orcid.org/0000-0002-1282-0407
  • Chanin Bunlaksananusorn Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand https://orcid.org/0000-0001-9346-6173

DOI:

https://doi.org/10.13052/jmm1550-4646.1749

Keywords:

Tapped inductor buck converters (TIBC), analysis and modeling of DC−DC converter

Abstract

Modern smart electronic and information technology (IT) devices require a low DC voltage for operation. The low supply voltage is typically provided by a dedicated DC−DC converter by stepping down the system’s bus voltage (e.g., 12 V). It is essential that the converter possesses a large voltage step-down gain and, at the same time, operates at high efficiency. A tapped inductor buck converter (TIBC) is a topology that has a potential to meet these requirements. It has a simple circuit structure and high efficiency similar to a buck converter, but can give a larger voltage step-down gain. This paper presents a dynamic modeling and closed-loop control of a TIBC. The state space averaging (SSA) method is adopted for the dynamic modeling to derive small-signal transfer functions of the converter. Based on the duty-cycle-to-output voltage transfer function, a closed-loop control is designed to keep the converter’s output voltage constant. To verify the design, a prototype TIBC with closed-loop control is implemented. Experimental results show that the prototype converter has good output voltage regulation and fast transient response when subject to a step load. The effect of the crossover frequency and phase margin on the converter’s transient response is also illustrated.

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Author Biographies

Siripan Trakuldit , Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand

Siripan Trakuldit received the B. Eng. degree in electrical engineering from Walailak university and M. Eng. degree in control engineering from King Mongkut’s Institute of Technology Ladkrabang (KMITL), Thailand, in 2008 and 2012, respectively. Her research interest is power electronics.

Chanin Bunlaksananusorn, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand

Chanin Bunlaksananusorn received a Ph.D. degree in electrical engineering from The University of Edinburgh, UK, in 1997. He is currently an associate professor with the Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang (KMITL). His research interests are power electronics and energy conversion.

References

D. W. Hart, Power Electronics, McGraw-Hill Companies, 2011.

A. I. Pressman, K. Billings, and T. Morey, Switching Power Supply Design, 3rd ed., McGraw-Hill Companies, 2009.

Y. Jiao and F. L. Luo, "N-switched-capacitor buck converter: topologies and analysis”, IET Power Electronics, Vol. 4, Issue 3, 2011, pp. 332-341.

D. Maksimovic and S. Cuk, "Switching converters with wide DC conversion range", IEEE Transactions on Power Electronics, Vol. 6, Issue 1, 1991, pp. 151-157.

M.G. Ortiz-Lopez, J. Leyva-Ramos, E.E. Carbajal-Gutierrez, and J.A. Morales-Saldana, “Modelling and analysis of switch-mode cascade converters with a single active switch”, IET Power Electronics, Vol. 1, No. 4, 2008, pp. 478-487.

A. Agasthya and M. K. Kazimierczuk, "Steady-state analysis of PWM quadratic buck converter in CCM", IEEE 56th International Midwest Symposium on Circuits and Systems, 2013, pp. 49-52.

B. Axelrod, Y. Berkovich, and A. Ioinovici, “Switched-capacitor/switched-Inductor structures for getting transformerless hybrid DC–DC PWM converters”, IEEE Transactions on Circuits and Systems, Vol. 55 , Issue 2, 2008, pp. 687 – 696.

B. Axelrod, Y. Berkovich, S. Tapuchi, and A. Ioinovici, “Single-stage single-switch switched-capacitor buck/buck-boost-type converter”, IEEE Transactions on Aerospace and Electronic Systems, Vol. 45, Issue 2, 2009, pp. 419 – 430.

O. Pelan, N. Muntean, and O. Cornea, “Comparative evaluation of buck and switched-capacitor hybrid buck DC-DC converters”, International Symposium on Power Electronics, Electrical Drives, Automation and Motion, 2012, pp. 1330-1335.

K. Yao, M. Ye, M. Xu, and F.C. Lee, “Tapped-inductor buck converter for high-step-down DC-DC conversion”, IEEE Transactions on Power Electronics, Vol. 20, Issue 4, 2005, pp. 775-780.

K. W. E Cheng, “Tapped inductor for switched-mode power converters”, International Conference on Power Electronics Systems and Applications, 2006, pp. 14-20.

C. Ankit, A. Ayachit, D. K. Saini, and M. K. Kazimierczuk, "Steady-state analysis of PWM tapped-inductor buck DC-DC converter in CCM", IEEE Texas Power and Energy Conference, 2018, pp. 1-6.

E. Vuthchhay and C. Bunlaksananusorn, “Dynamic modeling of a zeta converter with state-space averaging technique”, International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2008, pp. 969-972.

E. Vuthchhay and C. Bunlaksananusorn, “Modeling and control of a zeta converter”, International Power Electronics Conference, 2010, pp. 612-619.

Published

2021-06-21

Issue

Section

Smart Innovative Technology for Future Industry and Multimedia Applications