Optimal Use of Zero Vectors for Minimizing the Output Current Distortion in Matrix Converters
Casadei, D.; Serra, G.; Tani, A.; Zarri, L.
Industrial Electronics, IEEE Transactions on
Volume 56, Issue 2, Feb. 2009 Page(s):326 - 336
Digital Object Identifier   10.1109/TIE.2008.2007557
Summary:This paper is focused on the current quality of matrix converter controlled by space vector modulation (SVM) feeding inductive loads. The analysis carried out in this paper leads to the determination of the optimal use of zero vectors, i.e., the switching pattern leading to the minimum rms value of the load current ripple. The optimization of the switching pattern is based on the graphical analysis of the loci described by the ripple of the current vector in the alpha- beta reference frame. As a result, a set of analytical relationships that allow the online calculation of the duty cycles of the zero vectors is presented. Finally, simulation and experimental results confirm that the current ripple of the proposed modulation strategy is lower than that of traditional SVM strategies and, in some cases, with a reduced number of commutations.

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