| Summary: | 碩士 === 國立中正大學 === 機械工程系研究所 === 106 === There have been continual efforts by the academic and industrial communities to improve the reliability and performance of turbomachinery, such as compressors, as new technologies become available. Active magnetic bearing (AMB) is one such enhancing technology that has been gaining strong momentum in recent years. However, the overall cost of AMB is high since position sensors and power amplifiers are expensive. This paper proposes a 5-DOF AMB system using just six power amplifiers. In this study, the relationships between the magnetic force, coil current, and air gap will be identified experimentally. The system model and controller will be modified accordingly. Numerical simulation results show that the rotor can be theoretically stabilized at the equilibrium position. Experiment show that using a two stage decoupling control method with view of effective mass can also stabilize the rotor.
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