Research on transverse end effect of linear induction motor for high-speed industrial transportation

To this kind of motor, the transverse edge effect is remarkable of this type LIM, which caused by biggish mover width and magnetic field gap. This paper analysis the secondary edge equivalent air-gap and edge leakage on the basis of electromagnetic field theory and magnetic energy storage, then the transverse leakage inductance of the secondary was derived. The characteristic of this type of machine is analyzed by using of the equivalent circuit considering secondary edge leakage and the dynamic transverse end effect, and the thrust and input voltage of the same and inverse mode are presented. A dual stator prototype machine is designed and experimental results verify the correctness and effectiveness of the formulas, which shows the same mode can increase the thrust and decrease the input voltage under the same current. It provides a more simple and accurate method for calculating transverse end effect in the design of high-speed LIM.