A linear consequent pole stator permanent magnet vernier machine

The linear permanent magnet (PM) vernier machine is very suitable for direct-drive applications. This paper proposes a linear consequent pole stator PM vernier (LCPSPMV) machine, which can offer high thrust force due to the use of magnetic gear effect. The key of the proposed machine is the introduction of consequent pole. Thus the volume of the PM can be reduced, and the initial cost can be reduced consequently. Based on the finite element analysis, the static characteristics of the proposed machine including the PM flux linkage, no-load EMF, detent force and thrust force are accurately analyzed. Compared with the existing linear stator PM vernier (LSPMV) machine, the proposed machine can offer higher no-load EMF, lower detent force and enhanced power density in the conditions of the same rated speed, winding turns, electric loading. Hence, the validity of the proposed machine is verified.