Analytical approach to the design of a high-force density double-sided linear switched reluctance motor

Abstract

This paper presents an analytical approach to the design of a high–force density double-sided linear switched reluctance motor (LSRM). The design is based on an analytical formulation of the average propulsion force determined using the non-linear energy conversion loop, in which the unaligned magnetization curve is assumed to be a straight line and the aligned magnetization curve is represented by two straight lines. The main dimensions of the LSRM are determined in accordance with the machine requirements, the proposed average propulsion force formula and the geometrical relationships that were presented in a previous paper. The present paper uses two dimensional finite element analysis that has been corrected to take into account the end effects in order to refine and/or to validate the proposed design. Finally an LSRM prototype was built following the proposed design and was verified by experimental measurements.