A Methodology to Simulate Induction Motor Dynamic Performance in the ABC Reference Frame Considering Mixed Eccentricity Effects

 

R. Flores-Angeles*, D. Olguín-Salinas

 

Escuela Superior de Ingeniería Mecánica y Eléctrica (ESIME), Instituto Politécnico Nacional, México D. F., México *robertf_@msn.com.

 

Abstract

This paper presents a methodology to compute the inductances of the abc induction motor model considering mixed eccentricity. The winding function method (WFM) is employed to calculate the magnetizing inductances. Moreover, the air gap is approximated by an expression which can consider the case mentioned before as well as the healthy case (i.e., with uniform air gap). Due to the fact that the dynamic performance of the machine depends strongly on its inductances, some basic dimensions of a real machine are used and a comparison between different free acceleration characteristics is given such as currents, electromagnetic torque and speed.

Keywords: air-gap distribution, eccentricity, inductance computation, induction motor, winding function method.

 

Resumen

En este trabajo se presenta una metodología para el cálculo de las inductancias del motor de inducción considerando su modelo en el marco de referencia abc y bajo condiciones de excentricidad mixta. Se emplea el método de función de devanado (MFD) para calcular las inductancias de magnetización de la máquina. Asimismo, la distribución del entrehierro se aproxima por medio de una expresión la cual puede considerar el caso antes mencionado además del caso sano (i.e., entrehierro uniforme). Debido a que la dinámica de la máquina depende fuertemente de sus inductancias, se muestra la comparación de resultados de un arranque en vacío mostrando variables como corrientes, par electromagnético y velocidad, empleando algunas dimensiones básicas de una máquina real.

 

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