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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 10    
Website: http://www.ijser.org
scirp IJSER >> Volume 2, Issue 10, October 2011 Edition
Achieving Zero Common Mode Voltage and Improved Linearity Relationship by a Novel Modulation Method
Full Text(PDF, 3000)  PP.  
Nasim Rashidirad, Abdolreza Rahmati, Adib Abrishamifar
Common mode voltage, Multilevel modular inverter, Modulation, Linearity, THD
This paper proposed a new modulation strategy to eliminate common mode voltages in multilevel inverters. In this scheme which is explained for a 5-level modular inverter, all voltage vectors with zero common mode voltages can be classified into four categories and each two adjacent categories composed a segment. Synthesized voltage vectors that are an approximation to the reference vector belong to the segment in which the reference vector lies. Dwell times of these voltage vectors, depend on the distance between reference vector and the voltage vectors. This scheme leads to a good linearity relationship and low total harmonic distortion.
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