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Design and Analysis of a Linear-Rotary PM Actuator with Consequent-Pole Staggered Mover

In this paper, a linear and rotary permanent magnet (LRPM) actuator is proposed. To achieve the decoupling between linear and rotary motions, two sets of independent concentrated armature windings are embedded in the stator. To eliminate even-order harmonics of back-electromotive force (back-EMF), a staggered mover is specially designed. The staggered mover can generate radial and axial magnetic field, which interact with armature magnetic field to produce torque and thrust force. Moreover, the staggered mover with surface-mounted PM (SPM) and consequent-pole PM (CPM) structures are analyzed and compared. The electromagnetic performance of the two topologies are compared and analyzed by using the 3-D finite-element method. The results are presented to verify the effectiveness of theoretical analysis.