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A New Longitudinal End Effect Factor for Linear Induction Motors

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3 Author(s)
Gieras, J.F. ; Department of Electrical Engineering, Queen''s University, Kingston, Ontario, Canada K7L 3N6 ; Dawson, G.E. ; Eastham, A.R.

The longitudinal end effect in a linear induction motor (LIM) is analysed assuming two travelling magnetic flux density waves in the airgap: the wave travelling with synchronous velocity and the wave representing end effect [1]. A simple equation for the end effect factor which modifies the airgap EMF is obtained, and a simple equivalent circuit incorporating the end effect factor is established. Analysis is compared with measurements from two largescale single-sided LIM's. The equation for the end effect factor is sufficiently accurate to be used for design studies of LIMs. Since end effects are negligible at low speeds, the end effect factor has application for medium and high-speed LIMs.

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Energy Conversion, IEEE Transactions on  (Volume:EC-2 ,  Issue: 1 )