Design of the Starting Device Installed in the Single-Phase Switched Reluctance Motor

Abstract

The single-phase switched reluctance motor (SRM) generates the positive torque in the restricted section. It cannot start by itself and the torque ripple is heavier than multiphase SRM as the positive torque is not generated in all the sections. For self-starting and fixing rotating direction, the rotor should be placed at the rising inductance slope when stationary. This paper proposes the design process of the starting device which puts the rotor in the starting position before it is started and design the starting device composed of the parking permanent magnet for the prototype single-phase SRM. The equation of the magnetic attractive force required at the acting point is derived from the equation of rotational motion and calculated by the experiment with the prototype. Finally, the proper position and magnetic attractive force of the permanent magnet as well as the starting torque is confirmed through the FEM analysis