Design of a hybrid linear stepper motor for shunting the railways channels

This paper concerns the optimal design of hybrid linear stepper motor by evaluating the developed propulsive force for each position of the used permanet magnet. The new linear actuator is proposed for shunting the railways channels in aim to replace the currently used system which consists of a rotary actuator coupled with system for movement transformation (Rotary to Linear). Hence, three different structures with permanent magnet are analysed by finite element method in aim to evaluate the propulsive force versus the mobile displacement. The magnetic flux distribution and the force profile of each hybrid structure are presented and discussed. The analysis of different actuator structures allows the selection of the proper structure for the specific requested application.