Design of Controller for Magnetic Levitation System for an X-Y LSM

摘要

We studied a magnetic levitation system for an X-Y linear synchronous motor (X-Y LSM) combining a four-pole yoke hybrid electromagnet with the X-Y LSM armature. This system makes possible a noncontact two-dimensional drive. A four-pole yoke hybrid electromagnet can control three degrees of freedom by itself. In a steady state, this system is suspended using only permanent magnet forces, and the control current converges to zero. In this paper, we describe an observer using only the gap length sensor. A gap length controller and zero power controller were designed based on the observer.