Digital simulation of two level inverter based on space vector pulse width modulation

Abstract

Space Vector Pulse Width Modulation (SVPWM), one of the advanced computation based PWM techniques, has many advantages over conventional carrier-based PWM methodologies. Recently, with the easy availability of Microcontrollers and Digital Signal Processors, this technique is being widely used in industrial inverters. This paper presents a simple model for a three-phase two level SVPWM inverter using MATLAB-Simulink software. The entire model is based on only elementary Simulink blocks, and the use of advanced tool-box functions has been avoided. Hence, the model can be used, understood and modified easily as per the need of the user. The inverter has been divided into several sub-systems. Each such 'sub-system-block' is explained individually. Both linear and overmodulation-zone-controls have been included. The model operates successfully for various values of amplitude modulation index. © Indian Society for Education and Environment (iSee).