Operation of induction motor-drive under different voltage sag conditions

Abstract

Abstract:Simulation of an Induction Motor-Drive system under various voltage sag conditions using Matlab/Simulink is presented in this paper. Variation of input current, speed and output torque for induction motor-drive is investigated in this paper. Simulation results show that the variation of speed and current in motor-drive system basically depends on the size of the dc link capacitor. It is shown that the maximum reduction of dc-link voltage happens during voltage sag type A. Unsymmetrical VS types E and G cause the maximum reduction and type B causes the minimum reduction of dc-link voltage respectively. The reduction of dc-link voltage depends to dc-link and source inductances. The higher reduction in dc-link voltage is resulted when the larger inductance is used.