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Control and Modulation of a Three to Asymmetrical Six-phase Matrix Converter based on Space Vector
Mohammed. A. Al-Hitmi, Khaliqur Rahman, Atif Iqbal, and Nasser Al-Emadi
Abstract This paper proposes modulation and control of a three-to-six-phase matrix converter with the asymmetrical six-phase output. The matrix converter (MC) outputs consist of two sets of three-phase spatially shifted by 300, the two sets have two isolated neutrals. Space vector approach is considered for the modeling and subsequent modulation of the three-to-six phase MC. Intelligent selection of voltage space vectors is made to synthesize the reference voltages and obtain the 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. For maximum output voltage gain and ensuring no reactive power 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 FPGA. Hardware results that validate the proposed control algorithm are discussed.
Keyword Asymmetrical, Multiphase, Matrix Converter, Modeling of Converter, Space Vector Pulse Width Modulation
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