Motion system design of a thin and compact linear switched reluctance motor with disposable-film mover

This paper describes a suitable motion system design that utilizes a thin and compact linear switched reluctance motor (LSRM) with a disposable-film mover. The motor features a simple structure that is easy to fabricate and install into existing and newly designed instruments. Made using readily available materials, the mover is considered disposable. To meet the objectives of a motion system, i.e., simplicity in terms of use and mover exchangeability, the motion performance should remain the same even when the mover is exchanged. To meet these objectives, it is desirable to provide controllers that are robust to changes to the movers, and it is important to clarify the limitations of the motion performance resulting from the different motor characteristics. Thus, using a controller designed for precise tracking, experiments were carried out to verify the robustness of the motion system against the influences of changes in the length and mass of the movers. The limitations of the motion performance were then formulated for systems with a small effective thrust force such as those used in the developed LSRM, and validated. Based on the results achieved, the range of additional mass specifically applied to maintain the same motion performance is clarified in the present paper.