A Transverse-Flux Single-Phase Tubular Switched Reluctance Linear Machine With 4 Poles

Transverse-flux structure is a potential choice for switched reluctance linear machines (SRLMs) to enhance electromagnetic thrust density. A transverse-flux single-phase SRLM combined with tubular shape, which is a tubular SRLM (TSRLM), is proposed in this paper. There are four stator poles on the cross section of its stator for increasing effective flux path and maximizing flux linkage. To increase the advantage of this novel TSRLM in thrust density, the sensitivity relationships between the maximum electromagnetic thrust value and some key structure parameters are investigated via three-dimension finite element method (3-D FEM). The optimal structural dimensions of proposed TSRLM are determined finally according to a series of sensitivity analysis results. In addition, a new concentrated winding structure is applied in the proposed TSRLM. The analysis result demonstrates that the proposed TSRLM with new concentrated winding structure is superior in thrust density than before.