Self-Sensing Magnetic Suspension System using an LC Resonant Circuit with a Positive Position Feedback Controller

LC공진 회로와 PPF제어기를 이용한 자체 측정식 자기 서스펜션 시스템

A self-sensing magnetic suspension system utilizing a LC resonant circuit is proposed by using the characteristic that the inductance of the magnetic system is varied with respect to the air gap displacement. An external capacitor is added into the electric system to make the levitation system be statically stable system, which much relieves the control effort required to stabilize the magnetic suspension system of haying an intrinsic unstable nature. For the realization of the self- sensing magnetically levitated system, an amplitude modulation / demodulation method is used with a positive position feedback controller Experimental results are presented to validate the proposed method.