Title: Development of modulation strategies for three-phase to two-phase matrix converters

Authors: Ebrahim Babaei, Seyed Hossein Hosseini, Gevorg B. Gharehpetian, Mehran Sabahi

Addresses: Faculty of Electrical and Computer Engineering, University of Tabriz, Bolv. 29 Bahamn, 51664, Tabriz, Iran. ' Faculty of Electrical and Computer Engineering, University of Tabriz, Bolv. 29 Bahamn, 51664, Tabriz, Iran. ' Electrical Engineering Department, Amirkbir University of Technology (Tehran Polytechnic), No. 424, Hafez Ave., 15914, Tehran, Iran. ' Faculty of Electrical and Computer Engineering, University of Tabriz, Bolv. 29 Bahamn, 51664, Tabriz, Iran

Abstract: In this paper, the modulation strategy is developed for three-phase to two-phase matrix converters for synthesising balanced and unbalanced output voltages from balanced and unbalanced input voltages. Reduction of low order input current harmonics with sinusoidal output voltages is achieved by using the proposed switching strategies. The other advantage of the proposed method is the significant reduction of the output total harmonic distortion (THD). There are no low frequency harmonics in the output voltage, too. Therefore, a small filter (if the switching frequency is high enough) can be used at the input and output sides. The converter with the proposed switching strategies has been modelled and simulated by PSCAD software. The simulation results have good agreement with measurement results.

Keywords: matrix converters; generalised transformer; direct power conversion; bidirectional switches; Scott transformers; Le Blanc transformers; power electronics; modulation strategies; total harmonic distortion; THD.

DOI: 10.1504/IJPELEC.2010.029501

International Journal of Power Electronics, 2010 Vol.2 No.1, pp.82 - 106

Published online: 30 Nov 2009 *

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