Estudo do comportamento de um contator de corrente alternada na presença de afundamento de tensão

Abstract

AC contactors are used to maneuver, control and / or protection of drive induction motors. When the voltage sag phenomenon occurs in the power distribution network, contactor undergoes some vibrations in its contacts, known as ringing, these vibrations can affect the equipment operation connected with the contactor. This work presents a study of the operation principle of a contactor and its behavior when voltage sags occur in the power supply. For this, the mathematical modeling of the contactor and a simulation in the MatLab program is done, to check the dynamic behavior and magnetic forces on the contactor when voltage sag occur. To validate simulations results, will be accomplished a test on the contactor through a simple experiment.