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http://dx.doi.org/10.6113/JPE.2019.19.2.475

Control and Modulation of Three to Asymmetrical Six-Phase Matrix Converters based on Space Vectors  

Al-Hitmi, Mohammed A. (Department of Electrical Engineering, Qatar University)
Rahman, Khaliqur (Department of Electrical Engineering, Qatar University)
Iqbal, Atif (Department of Electrical Engineering, Qatar University)
Al-Emadi, Nasser (Department of Electrical Engineering, Qatar University)
Publication Information
Journal of Power Electronics / v.19, no.2, 2019 , pp. 475-486 More about this Journal
Abstract
This paper proposes the modulation and control of a three-to-six-phase matrix converter with an asymmetrical six-phase output. The matrix converter (MC) outputs consist of two sets of three-phase spatially shifted by $30^0$, where the two sets have two isolated neutrals. The space vector approach is considered for the modeling and subsequent modulation of the three-to-six phase MC. The intelligent selection of voltage space vectors is made to synthesize the reference voltages and to obtain a sinusoidal output. The dwell times of selected voltage space vectors are adjusted in such a way that the effect of the second and the third auxiliary plane vectors (i.e., x1-y1, and x2-y2) are nullified. To achieve the maximum output voltage gain and to ensure that no reactive power is drawn from the utility supply, the input side power factor is maintained at unity. Nevertheless, the source side power factor is controllable. The modulation technique is implemented in dSPACE working in conjunction with a FPGA. Hardware results that validate the proposed control algorithm are discussed.
Keywords
Asymmetrical; multiphase; Matrix converter; Modeling of converter; Space vector pulse width modulation;
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