Performance Analysis of Three Phase Induction Motor Drive Using SVPWM Switching Techniques: Design Approach

Abstract

Space vector pulse width modulation (SVPWM) technique has emerged as a most used modulation strategy for the voltage source inverter (VSI) fed AC motor drives. Avoidance of the main spectral annoyance, harmonics concentration around the carrier frequency and it multiples, is done by increasing the switching frequency to a band which does not contribute mechanical vibrations and acoustic noises. This results in tremendous increase the switching losses. A systematic evaluation of SVPWM switching patterns can guide proper selection of switching frequency and vectors. A Matlab based comparative analysis of all these SVPWM variants in terms of attributes such as total harmonic distortion (THD) in output line voltage, DC bus utilization and the harmonic spread factor (HSF) is reported. For this using space vector pulse width modulation method a multilevel inverter above two level inverter can be designed. This simplification reduced considerably the computation time. A two level space vector pulse width modulation method also used for three as well as five level inverter.