Analysis of transverse-flux switched-flux permanent magnet linear motor

In order to lower the cost, the switched-flux linear motor (SFLM) is proposed by combining both PMs and armature windings in short mover, which avoids long armature or long PMs as normal PMLMs. Moreover, SFLM combines the merits of linear motor and rotatory switched-flux motor, so they exhibit the advantages of bipolar flux-linkage and high thrust force density. It is more appropriate to be applied in long-stroke equipment such as solid garages, conveyers, machine tools and so on. Since the transverse-flux structure can break the mutual restriction between magnetic circuit and electric circuit, the transverse-flux PM motors are often proposed for high force density and low speed. Combined the transverse flux structure and switched-flux structure, a novel transverse-flux SFLM (TFSFLM) was proposed in this paper, which does not have the limit between slot area and tooth width compared with normal switched-flux PM machine structure.