Investigation of Configuration of Permanent Magnets on Repulsive Type Magnetic Bearing

As the magnetic bearing system has many electromagnets and controlled circuits, the problem of complicated control system and its high costs are incurred. In case the magnetic bearing is used for inertial energy storage under small radial disturbance, it is possible to simplify the radial control by using repulsive force of permanent magnets. The system can be applied to the uninterrupted power supply and flywheel energy storage. We have developed a new non-contact magnetic bearing system with the necessary controlled elements[2]. The stability of the overall system is very much influenced by the characteristics of the permanent magnets. This paper investigates the characteristics of permanent magnets and its configuration in Repulsive Type MagnetiC Bearing system. It proposes the placement of the permanent magnets requiring no radial control resulting better stability of the total magnetic bearing system.