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In the transport system of a thin steel plate production line, the quality of the plate surface deteriorates over time because of contact with rollers. Accordingly, studies of electromagnetic levitation technology have been carried out. However, when a flexible thin steel plate is targeted for levitation, levitation control becomes difficult because the thin plate undergoes increased deflection. To solve this problem, we propose a hybrid system to control levitation of thin steel plates using the attractive force generated by permanent magnets. In this paper, we searched the optimal placement of the permanent magnet attractive force is considering the phenomenon of change in the distance between the permanent magnet is changed. Furthermore, we carried out magnetic levitation experiments to confirm levitation stability. As a result, optimal placement of considered attractive force could suppressed deflection of steel plate compared to optimal placement of not considered attractive force. In addition, we could confirm the same tendency in the levitation experiment.

Hybrid Magnetic Levitation System for Thin Steel Plate by Electromagnets and Permanent Magnets