Influence of Different Types of Mover on the Thrust Characteristics of Long Stator Ironless Permanent Magnet Synchronous Linear Motor¹

The structure of Ironless Permanent Magnet Linear Synchronous Motors (IPMLSM) used in magnetic levitation is simple, however, the thrust increase is limited due to ironless. It is important to study how to increase the thrust of the motor. This paper uses two-dimensional finite element analysis method to calculate the thrust characteristics of different types of magnets. The thrust characteristics of IPMLSM with 2-segment Halbach magnet array, IPMLSM with improved 2-segment Halbach magnet array and IPMLSM with 4-segment Halbach magnet array are respectively calculated by simulation. Meanwhile, the influence of the mover magnets' shape on the motor thrust characteristics is discussed.