Design and analysis of two-degree-of-freedom actuator using PMSM and LSM

This paper presents the design and analysis of two-degree-of-freedom actuator that can move in rotary and linear direction. The proposed actuator is moved in principles of permanent magnet synchronous motor and linear synchronous motor. The structure of the actuator is robust to use the ring magnets that magnetized in axial direction. Moreover, the stator of the actuator has the salient pole in axial direction for improvement of thrust density. Characteristics of the actuator are analyzed by three-dimensional finite element method. As a result, the actuator is obtained characteristics that the average torque is 61.8 mNm in rotary motion and the average thrust is 9.00 N in linear motion.