Abstract
Recently, many magnetic machine elements are developed for industrial use. Magnetic bearing, which enabled rotation machines to support a rotor without contact, is also developed and applied. For such a practical use, miniaturization can be necessary for magnetic bearings. In this paper, we designed 3-pole magnetic bearing with permanent magnet to shorten both bearing length and bearing outside diameter. With this bearing, we experimented and succeeded in perfect levitation and rotation at 7200rpm. Then, we designed 3-pole self-bearing motor in order to further miniaturize bearing length. This self-bearing motor can rotate a levitated rotor in itself without exterior motor unit.
