Permanent magnet linear synchronous motor (PMLSM) has the advantages of high thrust density and good control accuracy, which can be applied in high-power and high-speed occasions. In this paper, the analytical models are established to obtain the electromagnetic performance for the PMLSMs with dual secondaries and dual primaries. The air-gap flux density and the electromagnetic thrust are also obtained by the finite element model to verify theoretical analysis. Besides, an improved structure is also put forward in order to suppress the thrust fluctuation of the PMLSM. Finally, the advantages and disadvantages of two PMLSMs topologies are listed. These analyses would provide a guide for the design of PMLSMs applied in high-power and high-speed occasions. Index Terms-Bilateral permanent magnet linear synchronous motor (BPMLSM), analytical method, finite element algorithm (FEA), electromagnetic performance.

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