Nisha Prasad, Shailendra Jain, and Sushma Gupta
LSRM, LIM, force performance, calculated parameters, LSRMdesign, FEM simulation
Linear motor-powered rail transport systems generally employ a linear induction motor (LIM) in their propulsion systems. The rugged and simple structure of this motor justifies its popularity for use in such applications. However, the LIM suffers from challenged power factor and high eddy current losses due to the use of aluminium in its structure. These drawbacks augment the need to find a suitable alternative to this motor. Previous works compare the LIM with other popular linear synchronous motor (LSM) and linear flux-switching permanent magnet motors (LFSPM) to establish different alternatives. However, a quantitative comparison of LIM with linear switched reluctance motor (LSRM) is largely missing from the literature. The LSRM promises to provide such an alternative because of its inherent features. This motor possesses a simple and cost-effective structure along with high power density and high efficiency. This paper, therefore, presents a comparative investigation of these two motors based on force performance and estimated physical parameters. This paper studies a 6/4 LSRM designed for the same specifications and stack measurements that have been used in a previously published paper to design the LIM. The study analyses the LSRM using the finite element method (FEM) and compares it with the analytical results of LIM given in that previously published paper. The comparison is purely based on FEM simulation results. The results highlight the capabilities of the LSRM compared to the LIM for transit applications.
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