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標題: | 具減振、阻尼、獵能功能之永磁式雙質量飛輪設計與分析 Design and Analysis of a Novel Magnetic Dual Mass Flywheel with Anti-Vibrating, Damping, and Energy Harvesting Functions |
作者: | Yu-Fan Chen 陳昱帆 |
指導教授: | 劉霆 |
關鍵字: | 雙質量飛輪,磁鐵互斥力,減振元件,阻尼元件,獵能元件, dual mass flywheel,magnetic force,anti-vibrating unit,damping unit,energy harvesting unit, |
出版年 : | 2018 |
學位: | 博士 |
摘要: | 為了解決在車輛傳動系統中產生的扭轉振動,目前市面上普遍使用扭力彈簧或雙質量飛輪作為減振器,其大部分是以線性彈簧或弧形螺旋彈簧作為彈性元件,達到隔絕振動與降低噪音的目的。本論文提出一種利用磁鐵間同極相斥力量作為彈性元件的構想,以磁鐵取代雙質量飛輪中的彈簧,解決因離心力導致彈簧摩擦而產生磨耗的問題,並同時具有減振之效,本論文將其命名為永磁式雙質量飛輪。首先,將磁鐵互斥作用力類比為彈性元件,建立力學模型,並透過實驗量測找出磁鐵之等效彈簧常數,以公式推導驗證磁鐵斥力與彈簧一樣具有緩衝與傳遞扭力的效果。接著,利用磁鐵在金屬圓管中移動所產生的渦電流阻力作為阻尼元件,並透過實驗量測找出磁鐵與金屬圓管間的等效阻尼常數,帶入系統矩陣方程式後,對永磁式雙質量飛輪元件進行靜態、動態、敏感度以及頻率響應等分析。此外,本論文研究還設計了獵能線圈模組,可與磁鐵進行相對運動以產生電磁感應,並能感測雙質量飛輪之相對轉速。本論文透過實驗量測找出相對速度與感應電壓的關係,計算雙質量飛輪於運轉中能夠擷取多少能量。最後,利用模擬軟體建立負載平台來測試永磁式雙質量飛輪之整體特性,並驗證此元件能夠裝載於車輛上。本論文所設計之永磁式雙質量飛輪具有隔絕引擎扭轉振動之功效,可應用於車輛傳動系統中,且有潛力使車輪轉速更為平順。 In order to solve the torsional vibration problems in vehicle powertrain systems, conventional dual mass flywheels (DMFs) use linear or arc springs as elastic elements to isolate vibration and noise. In this dissertation, a new concept of using the magnetic repulsive force as anti-vibrating units to replace DMF springs is proposed. Therefore, wear of springs due to frictions will be no more consideration and it also has the effectiveness of vibration isolation, and the new device is named magnetic dual mass flywheel (MDMF). First, a mathematical model of magnetic repulsive forces has been established and the effective stiffness constant is measured to prove the magnet pairs have the same abilities of the transmission of force compared to springs. Second, a moving magnet in a conductive tube induces an eddy current effect as a damping unit, which the corresponding damping coefficient of the MDMF matrix form is measured for static, dynamic, sensitivity, and frequency analyses. In addition, an energy harvesting unit is designed that an electromagnetic induction can be induced through the relative motions between a magnet and a coil, which can be applied to sense the relative rotational speed of the flywheels. By measuring the relation between the relative speed and the induced voltage, the energy harvesting power can be calculated while the MDMF is rotating. Finally, through this way, the MDMF device is simulated to verify its function of vibration isolation by means of connecting to an external loading or being equipped on a vehicle. This new design of MDMF has a potential for vibration isolation and noise reduction in the powertrain systems. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/77480 |
DOI: | 10.6342/NTU201803775 |
全文授權: | 未授權 |
顯示於系所單位: | 機械工程學系 |
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