Analytical model for the time and frequency domain analysis of space-vector PWM inverter fed induction motor based on the Laplace transform of space-vectors

Abstract

The paper brings an analytical model for calculating both the steady-state and transient performance of an induction motor fed from the three-phase voltage source inverter with space-vector PWM. The proposed method makes use of the Laplace and modified Z-transformation of the space vectors (mixed p-z approach) to predict current response of the induction motor. From the Laplace transform of the stator voltage vector we can also derive Fourier analysis to predict the voltage harmonic spectrum. Experimental tests have been carried out confirming the validity of the analytical results.