Performance analysis of a linear hybrid switched reluctance machine

Linear switched reluctance machines (LSRM) have a relatively low force output and high force ripples. This paper discusses a double-sided linear hybrid switched reluctance machine (LHSRM) which includes permanent magnets to be embedded into the stator leg slots. The proposed LHSRM has hybrid excitation flux circuits, derived from the permanent magnets and external current excitations. Machine design based on the equivalent magnetic circuit analysis and the performance evaluation is carried out by the finite element methods (FEM). Simulation results demonstrate that the LHSRM has better propulsion force output performance with reduced force ripples, as compared to the pure LSRM without PMs at the same dimensions. Experimental measurement results verify that the proposed linear machine possesses a higher average force with a lower force ripple factor.