Influences of Secondary Width on Forces and Losses in Linear Induction Motors with Transversally Asymmetric Secondary

Since the secondary structure and relative position to the primary are the important parameters for the traction characteristics in linear induction motors, this study focuses on the influences of transversally asymmetric displacements of the secondary with multiple widths of the non-ferromagnetic and ferromagnetic layers, on motor performances, e.g., electromagnetic forces and secondary induced eddy current, in the linear motors. First, an analysis model to the three-dimensional numerical method, which is based on finite element analysis, is built, and the ranges of variable parameters for the simulation are given. Second, the calculation results for electromagnetic forces with the transversal displacement and the transversal width of the two layers of the secondary are shown and analyzed. At last, the relationship between motor parameters of the linear induction motor and the optimal width of the secondary is concluded based on the analysis results.