新型軸向式磁性聯軸器傳動特性量測與分析

The Measurement and Analysis for Transmission Characteristic of Novel Axial Magnetic Couplings

本研究之目的在於設計一個新型的軸向式磁性聯軸器，再設計兩個測試台分別量測磁性聯軸器之軸向磁力與傳輸扭矩，並應用有限元素法進行電腦模擬，再與實驗值作比較分析。亦針對本研究所設計的磁性聯軸器於裝配時所產生的誤差現象，進行其對傳輸扭矩及磁力的影響分析，以期能達到對此磁性聯軸器使用特性上有更深一層的瞭解。結果顯示，使用有限元素法分析軸向磁力、扭矩、滑差角與磁極間距的關係值，其與實驗值的誤差值皆在10%內。本研究所設計的磁性聯軸器之傳輸效率皆在92%以上，且在磁極間隙相同的條件下，傳輸扭矩愈大，效率愈高。另外，磁性聯軸器軸中心的徑向偏移愈大，最大傳輸扭矩與最大軸向磁力愈小，在相同的徑向偏移條件下，滑差角愈小，傳輸扭矩及軸向磁力減少率愈大。磁性聯軸器軸中心的角向偏移愈大，最大傳輸扭矩愈大，合力愈大。

The purposes of this study are to design two test rigs for measuring the axial magnetic force and transmission torque of a novel magnetic coupling. Using the finite element method (FEM) illustrates the characteristics of the novel magnetic coupling, and then we compare simulation results with experimental values. Moreover, the effect of misalignment on transmission torque and magnetic force of magnetic coupling designed for this research was explored in order to obtain the influence of assembly parameters. The results reveal that when FEM was used to analyze the correlations among the axial magnetic force, torque, slip angle and pole distance, the maximum error between the simulation value and the experimental value was within 10%. The magnetic coupling designed for this research has a transmission efficiency above 92%. With the same magnetic pole gap, the greater the external torque is, the higher the transmission efficiency is. In addition, the greater the radial displacement is, the smaller the maximum transmission torque and maximum axial magnetic force are. With the same radial displacement, the smaller the slip angle is, the greater the reduction rate of the transmission torque and the axial magnetic force are. The greater the angular displacement is, the greater the maximum transmission torque and magnetic force are.