Modeling and performance of linear induction motor with saturable primary.

摘要

This study presents a two-dimensional electromagnetic field analysis of single-sided linear induction machines (LIM), taking into account saturation in both primary and secondary cores. A convenient analytical layer model has been developed in which the primary core is represented by two layers, corresponding to the yoke and teeth-slot regions. A mathematical formulation of the generalized multilayer model has been applied to develop a seven layer model of a LIM, allowing machine performance to be evaluated from a computer program. The electromagnetic field theory results were validated by comparison with experimental results. The analytical computations are shown to produce very good correlation with test results for thrust at various excitation currents and different air gaps. It is shown that primary core and teeth saturation will limit the thrust of a LIM at high excitation. The sensitivity of the machine performance to changes in relative permeability of teeth and core regions is presented. (Abstract shortened by UMI.)