Discrete time-based model of the sinusoidal pulse width modulation technique

Abstract

This paper presents a novel mathematical model for the sinusoidal pulse-width modulation (SPWM) technique. The proposed mathematical model is based on the sampling theory and discrete-time signal processing tools. In this model, the carrier signal is represented as a non-uniform sampling function, while the switching actions are viewed as an interpolating process. The proposed mathematical model is used to simulate a single phase SPWM voltage source inverter. The simulation results are compared to the conventional SPWM model for the same inverter. The match between the results of the proposed and conventional SPWM models validates the accuracy of the new mathematical model