Research Projects

Development of an Analytic Model for Flux Switching Motors

Mohamad Mardaneh, M. Mirsalim

(September 2005 – September 2009)

This project presents developing an analytical model for flux switching motors. The motor is a class of variable reluctance motors that has two windings on stator; a field winding and an armature winding. Due to saliency of both stator and rotor poles, accurate modeling is difficult which arises from the nonlinear behavior of the machine. This paper presents a simple model which is able to predict the motor inductances. The advantage of this method is that it describes the parameters of motor based on its dimensions. The model predicts both the self and mutual inductances. In comparison with similar studies, the proposed model predicts the mutual-inductance of a flux switching motor very accurately. It should be noted that the mutual-inductance has not previously been considered by others in their analytic modeling of variable reluctance motors. The predicted results computed by the proposed analytic model are compared to that obtained by the two-dimensional finite element analysis.


A Generalized Model for Linear Induction Motors with the Consideration of Saturation, and the Edge and the End Effects

Aref Doroudi, M. Mirsalim

(September 1998 – 2002)

We modified, by means of the finite-element method (FEM), the model suggested by Duncan (Proc. IEE, pt. B, vol. 130, no. 1, 1983) for simulation of linear induction motors. The modified model covers the special phenomena in linear motors such as transverse edge effect, longitudinal end effect, and saturation of back iron. The modified model first computes the level of saturation by simple equations and an iterative method. Then, using the FEM, it computes the equivalent circuit parameters. Finally, it uses the Duncan model to account for the end effect. The modified model thus can be used to design linear induction motors. Furthermore, the change in equivalent circuit parameters at different operating conditions can be taken into account. A comparison of the simulation results based on the proposed model with experimental measurements shows the high accuracy of the model.


Tubular Linear Induction Motor

Mahmood Hosseini, Amir Tajik, M. Mirsalim

(September 2001 – September 2002)

In this project a Tubular Linear Induction Motor was designed and constructed. In fact, this motor is a kind of electromagnetic gun. The rotor of this machine was constructed as a two layer tube. The outer and inner layers were made of Aluminum and Ferrite, respectively.

Flux Reversal Generator

Allahyar Zohoori Zanganeh, M. Mirsalim

Date: (September 2002 – February 2003)

In this project a Flux Reversal Generator was designed and constructed.This type of generator works based on reversing the stator winding flux.