An Efficient Non-Inverting Buck-Boost Converter with Improved Step Up/Down Ability

Omar Abdel-Rahim, Andrii Chub, Andrei Blinov, Dmitri Vinnikov and Dimosthenis Peftitsis
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Omar Abdel-Rahim: Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
Andrii Chub: Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
Andrei Blinov: Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
Dmitri Vinnikov: Department of Electrical Power Engineering and Mechatronics, Tallinn University of Technology, 19086 Tallinn, Estonia
Dimosthenis Peftitsis: Department of Electrical Power Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway

Energies, 2022, vol. 15, issue 13, 1-17

Abstract: In this article, a new non-inverting buck-boost converter with superior characteristics in both bucking and boosting is presented. The proposed converter has some distinct features, such as high step-up/-down ability and low voltage/current stress on its switching devices. The voltage gain of the proposed converter is double the reported value for the traditional buck-boost converter. Although it has three switches, the three switches operate simultaneously, hence no dead-time is required. Two out of the three switches are under voltage stress equal to half of the output voltage. The overall efficiency of the system is promising because of the ability to select devices with low voltage drops. Converter analysis and steady-state performance in both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) are presented in detail. A 1 kW hardware prototype of the converter was implemented in the laboratory; with a step-up ratio of 3.5 and 1 kW power, the measured efficiency is above 95.4%, and with step-up ratio 8, it is around 91.5%.

Keywords: high-gain non-inverting buck-boost converter; continuous conduction mode (CCM); discontinuous conduction mode (DCM) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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