Development of a new flux switching transverse flux machine with the ability of linear motion

Abstract

This paper proposes a new rotary flux switching transverse flux machine with the ability of linear motion (FSTFMaLM), in which both the stator and the rotor cores are made by using soft magnetic composite (SMC) materials. With the special design pattern, for the rotary motion model, the proposed machine can combine both the advantages of the flux switching permanent magnet machine (FSPMM) and the transverse flux machine (TFM). It can output with relatively high torque density, and as there is no windings or the magnets on the rotor cores, the proposed machine can operate in the high speed region to improve the output power. With the adoption of the SMC materials, the manufacturing of this machine can be quite easy. By stacking the rotor core together and prolong it with the determined length in the axial direction, in addition with the special control algorithm, the proposed machine can have the ability of the linear motion. In this paper, the operation principle of this machine has been explained and the design methods are also presented. To seek the better performance, the main dimension of the machine is optimized, and for the performance evaluation, the finite element method (FEM) is adopted. The proposed machine can be used for the electric driving systems, robotic systems or other applications where the linear motion ability is required.

Keywords

• flux switching
• linear motion
• high torque density
• soft magnetic composite (smc)
• transverse flux machine