Space Vector PWM for Multilevel Inverters - A Fractal Approach

Abstract

This paper proposes a space vector PWM (SVPWM) technique based on fractal approach for multilevel inverters. The inherent fractal structure in the space vector representation of multilevel inverters is brought out in this paper. The proposed method utilizes the inherent fractal structure of the space vector representation of multilevel inverters. Sector identification and switching vector determination in SVPWM through this fractal approach reduces the computational complexity. The proposed method does not use any look up tables for sector identification. The switching space vectors are also directly determined without using any look up tables. The proposed scheme can be extended to an n-level inverter without increase in complexity. Simulation results are presented for a 5-level inverter.