关键词: 直线感应电机, 次级导体结构, 电磁推力, 制动时间

Abstract: Two secondary conductor plate structures (triangular and trapezoidal) were proposed to solve the defects of small electromagnetic thrust and longer braking time when the secondary rectangular structure of thelinear induction motor(LIM) is operating in a large air gap. Under the condition that the primary electromagnetic structure remained unchanged, two-dimensional finite element models of three secondary conductor plate structures such as rectangle, triangle and trapezoid were established respectively, and the mechanical characteristic curves of the above three structures were obtained. Analysis of the thrust by the mechanical curve, and the unit current generated by the braking time required, it was considered that the proposed structure triangular secondary conductor optimal. The above analysis results provide a reference for the optimization of the LIM secondary structure.

Key words: linear induction motor(LIM), secondary conductor plate construction, electromagnetic thrust, braking time