Comparative analysis and simulation of PWM and SVPWM inverter fed permanent magnet synchronous motor

Abstract

Permanent magnet synchronous motors (PMSMs) have dominated the motion control industry to the present, and, according to the current trend, there seems to be no end for it Induction motors have always been a minority in the motion control, and they are mainly used in applications, where the field weakening can be utilized to avoid the over-sizing of the drive, which would be the case with PMSMs. There is an increasing trend of using Space vector pulse width modulation (SVPWM) because of their easier digital realization and better dc bus utilization. In this paper both Sinusoidal PWM and space vector PWM feeding a PMSM motor are considered. These techniques are studied through simulation using MATLAB/SIMULINK software and the performance of both the techniques are compared. It is shown through simulation that Space vector PWM effectively utilize dc line voltage and generates reduced THD when compared with Sinusoidal PWM.