A general Modulation strategy for multilevel inverters using SVPWM approach

In this paper, a Space Vector Pulse Width Modulation (SVPWM) scheme for multilevel inverter is presented. In the proposed scheme, only 2-level inverter space vectors are used for generating the reference vector for an N-level inverter. Here 60° coordinate system is used to represent space vectors instead of using Cartesian coordinate system so as to reduce the computational complexity. The proposed scheme for generating SVPWM for multilevel inverters is explained for a 5-level inverter and experimental results for a 3-level inverter implemented with open-end winding configuration is presented.