A Study on Semi-Active Magnetic Bearing Position-Controlled by Piezoelectric Actuators
Jung-Ho Park, Hu-Seung Lee, Young-Bog Ham,
and So-Nam Yun
Energy Plant Research Division, Korea Institute of Machinery & Materials, 104 Sinseongno, Yuseong-gu, Daejeon 305-343, Republic of Korea
This paper investigates non-contact hybrid bearings that use permanent magnets for repulsive force and piezoelectric actuators for position-control. A structurally-improved hybrid bearing is presented. First, the concept of the hybrid bearing is briefly introduced along with previous test results. Then, the newly devised bearing with a decreased gap between rotor and stator is designed and analyzed with FEM to optimize the magnetic forces. Finally, a prototype bearing using the proposed mechanism is fabricated and a control method is discussed.
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