Zero-Power Magnetic Levitation By Magnetic Force Control Device Using Lamination Of Magnetostrictive Material And Piezoelectric Material

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, whereby the magnetization of the GMM hence a magnetic force is control by the applied voltage to the PZT. Because the PZT is considered electrically capacitive in steady state, no electric energy is required to maintain constant magnetic force. We propose a magnetic levitation using a magnetic force control device with laminate composites of the 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 the PZT.