Abstract
This paper shows the influence of the air-gap length variations in a low speed linear induction motor behavior. Changes in the air-gap length produces variations in the equivalent circuit model parameters of the low speed linear induction motor, altering the mechanical characteristics of the motor. This analysis is extended to the dynamic model of the linear induction motor. A new dynamic model is proposed to take into account the air-gap variations and an expression to calculate the dynamic normal force developed by the motor is presented. The proposed models are compared to the static and dynamic computational simulations using the finite element method. The results show the proposed model has a good correspondence with the computational simulations.
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