Thrust and efficiency analysis of linear induction motors for semi-high-speed Maglev trains using 2D finite element models

The semi-high-speed magnetic levitation (Maglev) train currently being developed in Korea uses linear induction motors (LI Ms) for thrust. LI Ms have very high operation reliability and relatively low production costs. However, when applied to Maglev trains, their operation efficiency is lowered because of the large air gaps. Therefore, this paper analyzes in detail the driving force, normal force, and efficiency of LIMs applied to Maglev trains, using finite element models. The entire operating area of LIMs is divided into a rated driving force region and a rated output power region; the driving force, normal force, and efficiency are interpreted and analyzed.