Title: Design and implementation of an improved tri-state boost converter with optimal Type-III controller

Authors: Niraj Rana; Arnab Ghosh; Subrata Banerjee

Addresses: Department of Electrical Engineering, National Institute of Technology Durgapur, Durgapur-713209, India ' Department of Electrical Engineering, National Institute of Technology Rourkela, Odisha 769008, India ' Department of Electrical Engineering, National Institute of Technology Durgapur, Durgapur-713209, India

Abstract: Over the years, DC-DC switched mode power converters (SMPC) are playing important role for technological advancement. Good dynamic performance is the one of the important criterion for designing the closed-loop converters. But some DC-DC switching converters (such as buck-boost, boost, flyback, etc.) have non-minimum phase problem due to a right-half plane (RHP) zero in their small-signal control-to-output transfer function. So, the converters experience poor dynamic performance due to presence of non-minimum phase problem. Tri-state boost converter with PID controller can solve the non-minimum phase problem easily, but the dynamic response will not be satisfactory. In this work, an improved tri-state boost converter with gravitational search algorithm (GSA)-based optimised Type-III controller is designed and fabricated in the laboratory. The comparison between closed-loop performances of conventional boost converter and tri-state boost converter with classical ('k-factor' method) and optimal Type-III controllers have been presented in this work. The experimental results prove the efficacy of optimised controller for the proposed converters. The proposed control scheme based on optimised Type-III controller for tri-state boost converter is not found in any literature and is newly introduced in this paper.

Keywords: switched mode power converter; SMPC; tri-state boost converter; non-minimum phase system; gravitational search algorithm; GSA; optimal Type-III controller.

DOI: 10.1504/IJPELEC.2019.099339

International Journal of Power Electronics, 2019 Vol.10 No.3, pp.236 - 265

Received: 05 Apr 2017
Accepted: 14 Jul 2017
Published online: 29 Apr 2019 *

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