Performance analysis of a dual stator linear switch reluctance machine with rectangular segments considering force ripples for long stroke conveyor applications

Linear switch reluctance machine (LSRM) has been a promising alternative for linear application systems despite its low force density and high force ripples. In long stroke conveyor applications, the stator of LSRM should be laminated requiring no gap or interruptions, being a difficulty in practical use. This paper presents a dual stator LSRM with magnetically isolated rectangular segments. The presented machine consists of a simple concentric winding but not similar to the conventional LSRM windings, being suitable for long stroke transportations and exhibiting high reliability and low cost. The machine design procedure is given and the key dimensions which crucially affect the machine performances such as force profile, average thrust and force ripple are discussed. It has been demonstrated that the presented machine has gained superiority over conventional LSRM in terms of higher propulsion force density and low cost.