Triaxial Active Control Magnetic Bearing With Asymmetric Structure

Abstract

A standard magnetic levitation system has several magnetic bearings (MBs) to levitate its rotor. However, the combined structure of MBs increases the system s axial length and size. To solve these problems, we propose a triaxial active control magnetic bearing (AMB) with an asymmetric structure. This study demonstrates the development of the proposed AMB using a prototype. Radial and thrust suspension force characteristics are shown and compared with analysis and measured results. Furthermore, a magnetic levitation test is conducted, and it shows that the rotor can levitate. In addition, stability against disturbances is evaluated using a sensitivity function, and loss characteristics when the rotor is rotated are measured and discussed.