本論文探討磁浮軸承系統的設計，提出新型的對稱式徑向磁浮軸承。主要以電磁力的懸浮系統抵抗重力以支撐轉軸。因為磁浮系統具有非機械式接觸、零摩擦與良好控制性的特點，於軸承應用上可以達到低噪音、高效率及高可靠度的性能。在本文中將敘述說明磁浮軸承系統的設計概念與方法，並利用Ansoft® Maxwell 3D 有限元素分析法，進行磁場與磁力的模擬。此外，本研究實際製作一套單軸磁浮軸承實驗系統，該系統主要組件為：磁浮機構為受控場，PWM 驅動器做為驅動電磁線圈之電流源，以個人電腦為平台的LabVIEW® 做為迴授PID 控制器，光纖位移感測器提供位移訊號，如此形成閉迴路控制系統，是一個典型的光機電整合系統。並對其做系統鑑別與初步測試，藉以驗證我們的分析結果。最後以實驗結果來驗證本設計系統之可行性。

This thesis studies the design of a magnetic bearing, symmetric type magnetic bearing, and using electromagnetic force to suspend gravity force and support the rotor from the system. The magnetic bearing system possesses non-mechanical contact, zero friction, and miniature characteristics; it presents vibration absorber performance of low noise, high efficiency and high reliability in operation. In this thesis, the design concept and method of the magnetic bearing is discussed. The magnetic force and magnetic field circuits are simulated by using finite element analysis method software, Maxwell 3D Field Simulator by Ansoft®. Moreover, the magnetic bearing system is manufactured for experimental study. The hardware construction, including magnetic bearing mechanism as plant, the voltage-controlled PWM current driver, the PC-based PID feedback controller by LabVIEW®, optical fiber sensors provide positional signals, such as a closed-loop system, is a typical optical-electro-mechanical integration system. Based on the system identification and preliminary test, we could verify the analytical result. Finally, a series of experiment is carried out to verify the original design system feasibility.

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