A NEW GENERALIZED ALGORITHM OF SPACE VECTOR PWM FOR MULTILEVEL INVERTERS

Abstract

This paper presents a new generalized algorithm of space vector pulse width modulation (SVPWM) for the three phases N level inverters. This algorithm is based on numerical analysis; it offers a great flexibility to optimize switching waveforms and is also adapted for digital implementation. This paper analyzes the voltage space vector distribution of the three phase inverter in (α-β) coordinates, and describes new methods for selecting the switching states and for calculating the duty cycles of adjacent vectors. Simulation and experimental results, in terms of harmonic analysis and THD responses, show the effectiveness of the generalized algorithm proposed.