Abstract
A rotational/linear two degrees-of-freedom switched reluctance motor (2DOF-SRM) has been developed for the purpose of independent control of rotational and linear actuations on one actuator. The prototype 2DOF-SRM has 3 photo switches on the stator, detecting the rotor angular position for excitation of phase windings for rotational speed control. And an exterior linear position sensor was attached to the outside of the motor to detect the rotor axial position for linear displacement control. To improve sensing resolution and simplify the sensing system, this research developed the built-in high resolution angular and axial position sensor in which the rotor is used as the sensor target. This paper presents the sensing principle of the developed sensor and its performance.
