Modeling of a Single Point Suspended Electromagnetic Suspension Carrier System Study on Rolling Motion

Authors made a single point suspended electromagnetic suspension (EMS) system. This EMS system was applied to a transport system. This transport system has a carrier and a guide. The carrier is provided with a magnet unit and a carrier body. The magnet unit which comprises two coils, two iron core and a permanent magnet, suspends the carrier with no contact. The guide comprises an iron plate and propelling coils. When the carrier passes through the curved section of the guide, pendulum motion occurs in the rolling direction. This is rolling motion. The rolling motion continues longer than the pitching motion caused by acceleration and deceleration. When the carrier is swaying, eddy current mainly induces in the iron plate because a magnetic field in an air gap between the iron core and the iron plate changes. The eddy current makes a difference of the convergence times between the rolling and the pitching motions. Our former research modeled the pitching motion of the carrier by considering the eddy current loss and a movement of the action point of the attractive force acting on the magnet unit. In this paper, authors make the model of the rolling motion by the same method. The validity of the modeling method is verified with simulational and experimental results.