PM-Biased AC Magnetic Suspension Having Energy Transfer Function

A novel AC magnetic suspension with a permanent magnet is proposed which has the performance of noncontact energy transfer to the suspended object (floator). The permanent magnet is used for suspending the weight of the floator. An electromagnet combined with permanent magnet operates for both stabilization and energy transfer to the floator. The principles of the proposed magnetic suspension system, an apparatus manufactured for experimental study and several experimental results are presented.