Simposio Internacional sobre la Calidad de la Energía Eléctrica - SICEL

Power semiconductor commutations often become sources of conducted Electromagnetic Interference (EMI) in adjustable speed drivers (ASD). Every switching operation of power devices in the inverter imposes high values of dV/dt for power cables and induction motors. Such voltage variation causes high frequency currents to flow between the motor phases (Differential Mode currents) and also between motor windings and the ground through stray capacitive links (Common Mode currents).  In this paper, equivalents circuits of the three phase induction motor high frequency are presented; the proposed model detailed separately the common Mode and differential mode characteristics AC electrical motor. The high-frequency model has been obtained by means of a frequency domain analysis using MATLAB program