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

Esmaeili, Soroush and Ghobadi, Kasra and Zare, Hassan and Jamil, Mohsin and Ali Khan, Ashraf and Mahmoudi, Amin (2022) A Trans-Inverse Magnetic Coupling Single-Phase AC-AC Converter. Energies, 15 (12). ISSN 1996-1073

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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.

Item Type: Article
URI: http://research.library.mun.ca/id/eprint/15567
Item ID: 15567
Additional Information: Memorial University Open Access Author's Fund
Keywords: AC-AC conversion, trans-inverse converter, magnetic coupling, commutation strategy
Department(s): Engineering and Applied Science, Faculty of
Date: 13 June 2022
Date Type: Publication
Digital Object Identifier (DOI): https://doi.org/10.3390/en15124319
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