Analysis of a Novel Transverse Laminated Rotor Flux Switching Machine

Abstract

Flux-switching permanent magnet machines with a segmented rotor are attractive alternatives for high torque and power density and high-speed applications. However, the motor doubly salient structure generates high torque ripples. In order to mitigate this problem and enhance motor torque density, a new flux-switching machine topology with transverse laminated rotor segments is proposed in this paper. An analytical model of the proposed machine for calculation of d - and q -axis inductances and developed torque for various number of rotor segments laminations are presented, as well. A finite element model of the proposed motor with various number of segments laminations is simulated in order to evaluate the analytical results. The results are compared with analytical outcomes that show acceptable accuracy of the analytical model. It is also shown that torque ripple is seriously suppressed, whereas average developed torque and efficiency are considerably increased in this new proposed topology. Eventually, the proposed rotor structure mechanical robustness is evaluated by structural finite element analysis. It is shown that the proposed design is mechanically reliable for low- and high-speed applications.