The Self-gap-Detecting Electromagnetic Suspension System with Robustness Against Variation of Coil Resistance

Abstract

There are few self-gap-detecting electromagnetic suspension (EMS) systems robust enough against variation of coil resistance. The authors succeeded in providing much robustness against the variation of coil resistance with a self-gap-detecting EMS system. An adaptive control for coil resistance and an exciting voltage compensator for differences between the coil resistances were applied to the self-gap-detecting EMS system. This paper proposes this new self-gap-detecting technique. The adaptive controller and the exciting voltage compensator will be explained. The experimental results will show a validity of the technique.