Zero-power Magnetic Levitation using Magnetic Force Control Device of Lamination of Magnetostrictive Material and Piezoelectric Material

Abstract

This paper describes a zero-power magnetic levitation using magnetostrictive (GMM)/piezoelectric (PZT) laminate devices. This magnetic force control is based on the inverse magnetostrictive effect of magnetostrictive material, where magnetization of GMM hence a magnetic force is control by the applied voltage to PZT. Because PZT is considered electrically capacitive in steady state, no electric energy is required to maintain constant magnetic force. We conducted a magnetic levitation using a magnetic force control device with there laminations of GMM and PZT. Zero-power consumption of the levitation system in keeping a constant gap was confirmed by the measurement of the input current to PZT.