Author : Manpreet Singh Manna, Surbhi Khajuria and Sanjay Marwaha

 
The end effect of a linear induction motor (LIM) is one of the most important parameters that degrades the performance of a LIM .These effects become prominent in high speed operations of a LIM. The exit part of the LIM created minor end effect as compared with those of the entry part. However, the asymmetric air gap magnetic flux density at the exit zone produces unbalanced normal forces resulting in dolphin effect. In this paper, proposal is made to chamfer the primary outlet teeth to minimize the longitudinal end effect at the exit zone. We report on our proposal of reducing the end effects by analysing LIM by using finite element method. Results proved that chamfering can improve thrust performance effectively.

Keywords: Linear Induction Motor, End effects, Dolphin effect, Finite element method, Mosebach Model, Thrust.

Article published in International Journal of Current  Engineering  and Technology, Vol.3,No.2 (June- 2013)