A Trans-Inverse Magnetic Coupling Single-Phase AC-AC Converter

Soroush Esmaeili, Kasra Ghobadi, Hassan Zare, Mohsin Jamil, Ashraf Ali Khan and Amin Mahmoudi
Additional contact information
Soroush Esmaeili: Department of Electrical Engineering, Mazandaran University of Science and Technology, Babol 47166-85635, Iran
Kasra Ghobadi: Department of Electrical Engineering, Amirkabir University of Technology, Tehran 15916-34311, Iran
Hassan Zare: Department of Electrical Engineering, Technical and Vocational University (TVU), Tehran 14357-61137, Iran
Mohsin Jamil: Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, NL A1B 3X5, Canada
Ashraf Ali Khan: Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John’s, NL A1B 3X5, Canada
Amin Mahmoudi: College of Science and Engineering, Flinders University, Adelaide 5042, Australia

Energies, 2022, vol. 15, issue 12, 1-25

Abstract: This paper introduces a new single-phase AC-AC converter based on an impedance source circuit. Like the existing single-phase impedance source AC-AC converters, it has the buck-boost ability and direct ac conversion. The input and output voltage possesses the same ground, and the phase angle is maintained and reversed smoothly. The presented converter utilizes a coupled transformer which allows the designer to exploit the transformer’s turns ratio as a variable to attain the desired output voltage. Additionally, the used transformer provides an option to obtain higher voltage gain by decreasing the turns ratio. Hence, smaller size of the coupled inductors is required for the higher voltage cases. To eliminate the switching voltage and current spikes on the power switches, a safe commutation strategy is used instead of utilizing snubber circuits. Furthermore, the input current is continuous and sinusoidal with low harmonics thanks to embedding the input inductor in series with the input source. Additionally, a dynamic voltage restorer is presented based on the proposed converter to compensate the voltage sag and swell faults. Simulation results are provided to evaluate the theoretical analysis. Finally, a laboratory prototype has been fabricated to demonstrate the validation of the presented converter.

Keywords: AC-AC conversion; trans-inverse converter; magnetic coupling; commutation strategy (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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