Abstract
This paper proposes a Space Vector based pulse width modulation scheme for multilevel inverters. The principle of fractals is employed to find the sector of operation. The scheme is simulated for a 5-level inverter and experimentally verified by using a 3-level inverter configuration. The 3-level inverter is realized by connecting dual 2-level inverters in open-end winding configuration. In the space vector diagram, to represent the space vectors, 60° coordinate system is used instead of the Cartesian coordinate system. In 60° coordinate system, only integer coordinates are involved and hence the proposed scheme reduces computational complexity of the fractal algorithm. Experimental results are presented, including operation in over modulation region.
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