The flux-switching transverse flux permanent magnet linear machine (FSTFPMLM) is proposed in this paper combining the advantages of transverse flux linear machine and flux-switching linear machine. Firstly, the structure and operating principle of FSTFPMLM is presented. Secondly, the magnetic field of a simplified FSTFPMLM is numerically computed by three-dimensional (3-D) finite element method (FEM). Thirdly, the thrust characteristics of the machine, including thrust force, cogging force and force ripple are numerically analyzed. The influence of structure parameters on the thrust characteristics has been analyzed by 3-D FEM. The law of thrust, cogging force and force ripple as the pole pitch ratio between primary and secondary and the ratio between tooth width and pole pitch of secondary variable provides the guidance to design FSTFPMLM, which aims to achieve the larger thrust, smaller cogging and force ripple using less permanent magnet materials. The thrust force capabilities of FSTFPMLM are compared with other topologies of linear machines. Finally, the prototype and experimental setup have been developed, and the calculated results and the measured results are in good agreement.

The novel linear flux switching permanent magnet machine with a three-dimensional magnetic circuit is proposed in this paper, which is suitable for aerospace, missile launch, and other fields, benefiting from high thrust force and low cost. First, the basic structure and working principle of the machine are introduced. Second, the equivalent magnetic circuit model considering the variable reluctance is established and the equations are put forward for magnetic analysis. Third, the simplified finite element model is performed to calculate the field distribution, the air-gap flux density, the flux linkage of winding, and the back electromotive force. Finally, a prototype is constructed and experiments show a good agreement with analysis.