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Multilevel Multiphase Feedforward Space-Vector Modulation Technique

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7 Author(s)
Leon, J.I. ; Electron. Eng. Dept., Univ. of Vigo, Vigo, Spain ; Lopez, O. ; Franquelo, L.G. ; Doval-Gandoy, J.
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Multiphase converters have been applied to an increasing number of industrial applications in recent years. On the other hand, multilevel converters have become a mature technology mainly in medium- and high-power applications. One of the problems of multilevel converters is the dc voltage unbalance of the dc bus. Depending on the loading conditions and the number of levels of the converter, oscillations appear in the dc voltages of the dc link. This paper presents a feedforward modulation technique for multilevel multiphase converters that reduces the distortion under balanced or unbalanced dc conditions. The proposed modulation method can be applied to any multilevel-converter topology with any number of levels and phases. Experimental results are shown in order to validate the proposed feedforward modulation technique.

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Industrial Electronics, IEEE Transactions on  (Volume:57 ,  Issue: 6 )