A new modulation method to reduce common-mode voltages in multilevel inverters
Rodriguez, J.; Pontt, J.; Correa, P.; Cortes, P.; Silva, C.
Industrial Electronics, IEEE Transactions on
Volume 51, Issue 4, Aug. 2004 Page(s): 834 - 839
Digital Object Identifier   10.1109/TIE.2004.831735
Summary: This paper proposes a new modulation strategy for multilevel inverters, which selects voltage vectors that generate zero common-mode voltage in the load, working at low switching frequency. Experimental results confirm that the method is highly effective and simple to implement in a modern microprocessor. The voltage distortion (total harmonic distortion), the number of commutations, and the linearity are also studied. Finally, it is concluded that the proposed strategy is highly suited for inverters with a high number of levels.

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