DefinePK

Abstract

This paper deals with the simulation and comparative analysis of Z source inverter (ZSI), also known as impedance source inverter with different shoot through control methods for adjustable speed drives. In order to obtain boosted output voltage, a shoot through state should always be followed by an active state. Therefore, small changes made in the classical three phase sinusoidal Pulse Width Modulation (PWM) technique can provide various shoot through control strategies for the ZSI. Simple boost control with triangular carrier wave, simple boost control with sinusoidal carrier wave, maximum boost control, maximum boost control with third harmonic injection, constant boost control  and constant boost control with third harmonic injection are available in the literature for various types of load and applications. In this work, simulations of various shoot through control methods are performed for the same modulation index and design parameters. The output voltage, output current of the inverter for the same input and load conditions are analyzed using MATLAB/SIMULINK for different types of boost control methods.