Mixed p‐z approach for analytical analysis of an induction motor fed from space‐vector PWM voltage source inverter

This paper proposes an analytical method for calculating both the steady-state and transient performance of an induction motor fed from the three-phase voltage source inverter. As a modulation technique of the inverter we consider space vector modulation. 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 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.