A 5-level Space Vector PWM Scheme for Inverters

Abstract :

Multilevel inverters are increasingly being used in high-power medium voltage applications due to their superior performance compared to 2-level inverters. Among various modulation techniques for a multilevel inverter, the space vector pulse width modulation (SVPWM) is widely used. In this paper, a simple space-vector pulse width modulation (SVPWM) scheme for multilevel inverter is presented. The method involves the conversion of space vector diagram of N-level inverter to that of a 2-level inverter. Here 600 coordinate system is used to represent space vectors instead of using cartesian coordinate system. In 60 0 coordinate system only integer coordinates are involved. So the computational complexity is reduced. The scheme doesn’t use any sector identification and switching vectors are generated automatically. The proposed scheme for generating SVPWM for multilevel inverters is explained for a 5-level inverter and simulation results are presented.

Author Name : Mohammed Shaffi.J

Keywords: Starting vector, Adjacent vector.