MAGNETIC SUSPENSION SYSTEM USING THREE FLUX PATH CONTROL MODULES

A new magnetic suspension system is developed which has three modules for flux path control. The module consists of a ferromagnetic plate inserted between a permanent magnet and a suspended object, an actuator for driving the plate and a sensor for detecting the motion of the plate. Since the flux from the permanent magnet to the object varies according to the lateral position of the plate, the suspension force can be controlled with the module. The module uses a voice coil motor as the actuator. Stable suspension and a three-dimensional noncontact manipulation are achieved in the developed system.