Analysis of electromagnetic force characteristics of direct drive linear motor for belt conveyor

Abstract In order to improve the operation efficiency of the belt conveyor, combined with the permanent magnet synchronous linear motor (PMLSM) structure, a direct drive linear motor with permanent magnet secondary and conveyor belt integration is proposed, and the electromagnetic force characteristics of the primary pair of composite secondary with or without iron core are compared to obtain the primary structure suitable for the conveyor, so as to ensure that the conveyor can take into account the dual characteristics of electromagnetic thrust and normal suspension force, and improve the operation performance of the motor. According to the Halbach permanent magnet array, the assembly structure of the composite secondary permanent magnet is optimized to improve the electromagnetic force characteristics of the motor and further improve the working efficiency of the conveyor. Then, the influence of different parameters on the electromagnetic force during operation is analysed.