Analysis of Linear Induction Motors with the Control Volume Technique

Abstract

Two-dimensional time dependent field calculation is mathematically formulated, using the “Control Volume Technique” for investigating the electromagnetic characteristics of linear induction motors (LIMs). The velocity term in the magnetic potential equation has been introduced using the identified technique. This modification was necessary in order to avoid possible mathematical instabilities during computations execution due to the presence of the velocity term in the diffusion equation. In the present analysis, end-effects were eliminated using periodical boundary conditions in the numerical solutions. It is revealed that, even with the absence of end-effects, the thrust-slip frequency characteristics are dependent on the secondary speed of the linear induction motor under investigation.