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Energies 2019, 12(7), 1376; https://doi.org/10.3390/en12071376

A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation

1
Electrical Engineering Department, University of Engineering and Technology, Lahore 54890, Pakistan
2
Electrical Engineering Department, The University of Lahore, Lahore 54000, Pakistan
3
Automatics and Applied Software Department, “Aurel Vlaicu” University of Arad, Arad 310130, Romania
4
Department of Electronic Engineering, Feng Chia University, Taichung 40744, Taiwan
5
Electrical and Computer Engineering Department, Dalhousie University, Halifax, NS B3H 4R2, Canada
6
Department of Electrical Engineering, University of the Punjab, Lahore 54590, Pakistan
*
Author to whom correspondence should be addressed.
Received: 24 January 2019 / Revised: 21 March 2019 / Accepted: 5 April 2019 / Published: 10 April 2019
(This article belongs to the Special Issue Adaptive Fuzzy Control)
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PDF [6552 KB, uploaded 10 April 2019]
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Abstract

In this research, a new single-phase direct AC-to-AC converter, operating in buck and boost mode, with a bipolar voltage gain, is proposed. The operation is accomplished through high frequency direct and indirect PWM control of a single switch with low voltage stresses. This reduces, not only the control effort, but also the switching losses. The low voltage stresses across the high frequency switches, reduce the dv/dt problem significantly without any loss and bulky voltage snubber arrangement. The operation, in its all-operating modes, has a low inductor ripple current and switching current. The proposed converter may be employed as an AC voltage restorer in a power distribution system to cope with the voltage sag and swell issues. The detailed analysis of the proposed converter is carried out in order to compare its performance with the existing converters. The simulation results obtained using the MATLAB/Simulink environment are verified through experimental results. View Full-Text
Keywords: bipolar voltage gain; direct ac-to-ac converter; PWM control; voltage stresses; voltage sag and swell bipolar voltage gain; direct ac-to-ac converter; PWM control; voltage stresses; voltage sag and swell
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ashraf, N.; Izhar, T.; Abbas, G.; Balas, V.E.; Balas, M.M.; Lin, T.-C.; Asad, M.U.; Farooq, U.; Gu, J. A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation. Energies 2019, 12, 1376.

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