130 / 2021-06-18 14:22:12

Design and Analysis of a Linear-Rotary Fault-Tolerant Consequent-Pole PM Actuator

consequent pole， fault-tolerant control， linear-rotary PM actuator

Linear-rotary permanent magnet (PM) actuators have been applied to many direct drive occasions. This paper proposes a novel linear-rotary fault-tolerant consequent-pole (CP) PM actuator for an integrated electromagnetic suspension and steering system. The key of the proposed actuator is the special stator and CP rotor. Combined CP structure, two sets of orthogonal and alternate-teeth wound fractional-slot concentrated-windings are adopted to achieve linear and rotary motion, and enhance fault-tolerant capability. By employing CP and flux-modulation structures, not only the airgap flux density can be enhanced in circumferential direction but also higher torque performance with lower PM consumption can be achieved. The relevant electromagnetic performance is predicted by using the finite-element method.