Design and Reduction of Thrust Ripple in Transverse Flux Permanent Magnet Linear Machine

This paper proposed a tubular transverse flux permanent magnet linear machine with the quasi-distributed stator segments, due to the problem of larger thrust force ripple in the machine, which has some merits higher force density and better controllable characteristic etc. Firstly, the structure and operating principle of tubular transverse flux permanent magnet linear machine was presented. Secondly, the influence of the quasi-distributed stator segments on the motor performance is analyzed in detail. Special attention is paid to the Back-EMF, cogging force and electromagnetic force etc. The paper investigates the influence of different arrangements in the transverse flux permanent magnet linear machine, including theoretical analysis and numerical calculation. The results show that the thrust ripple can be decreased by the quasi-distributed stator segments in transverse flux permanent magnet linear machine.