A New Property of Transient Currents of Induction Motors

J. C. CORREA; C. DE PRADA; J. SOLSONA; B. KUCHEN

Rosario

Congreso; XIII Reunión de Trabajo en Procesamiento de la Información y Control (RPIC2009); 2009

This work presents, demonstrates and analyzes a property that relates the transient response of stator and rotor currents to the speed of induction motors and their parameters. The straightforward application of this property allows determining the rotation speed of the motor and detecting a failure or variation of its parameters. This property is demonstrated analyzing the induction motor modeled by two parts: one linearand another non-linear. Based on the operating principles of induction machines and the theory ofdifferential equations, a hypothesis is stated on the behavior of currents in the transient state. Then, bysymbolically computing the eigenvalues, the hypothesis is verified so that it validates the stated property.