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.

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Published

2021-06-21

How to Cite

Trakuldit , S., & Bunlaksananusorn, C. (2021). Dynamic Modeling and Closed-Loop Control of a Tapped Inductor Buck Converter. Journal of Mobile Multimedia, 17(4), 673–692. https://doi.org/10.13052/jmm1550-4646.1749

Issue

Section

Smart Innovative Technology for Future Industry and Multimedia Applications

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