Abstract

Adopting magnetic levitation techniques in Steel Processing Industries is a beneficial way in maintaining the high quality of steel's surfaces. However, the control for levitation and guidance is not so easy, because of difficulties in mechanical and magnetic characteristics of steel, especially in those of thin steel plates. We have already established the stable magnetic levitation and guidance control for 1.6mm-thick steel plates mainly. In this paper, we aim at stable magnetic levitation for a 0.1mm-thick steel plate, which thinness is our supreme target. In order to realize such a noncontact system for 0.1mm-thick steel plates, we have to take account of its vibration and its magnetic saturation and leakage. This paper will describe a methodology for stable magnetic levitation and guidance of 0.1mm-thick steel plates and show many successful experimental results by considering those difficult characteristics of very thin steel plates.

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