Thrust Force Ripple Minimization of Linear Flux-Switching PM Brushless AC Machines

摘要

In this paper, the thrust force ripple of Linear Flux-Switching Permanent Magnet (LFSPM) machines is analyzed, and a novel LFSPM machine with less cogging force and optimal sinusoidal back-EMF is proposed. The method based on Fourier Algorithm is employed to reduce the cogging force due to slot-effect. In addiction, an optimal ratio of pole-width to pole-pitch for minimum harmonic components in the back-EMF is obtained by FE analysis. Finally, the proposed methods are validated by FE analysis and test.