Design and Analysis of Dual-Stator PM Vernier Linear Machine With PMs Surface-Mounted on the Mover

In this paper, a dual-stator permanent-magnet Vernier linear machine is proposed, which is suitable for long-distance application. The stator is only a salient pole structure, while the PM and windings are all placed on the mover. So the cost can be greatly reduced when it is used in a long-distance application. The topology and the operation principle of the proposed machine are introduced. Due to the appropriate dual-side structure, the magnetic flux leakage of the proposed machine can be effectively reduced. Moreover, the magnetic fields produced by PM between the two stators are connected in series. This means that the utilization of magnetic field can be enhanced. Therefore, the thrust force density and power factor will be improved. Finally, the electromagnetic performances are analyzed for verification by using finite element method.