- 學位論文
應用電磁式動能擷取之不斷電自行車照明裝置
An Electromagnetic Energy Harvester with Uninterruptible Power System for Bicycle Lighting
摘要
本文提出一電磁式動能擷取之具不斷電功能自行車照明設計，應用下列技術實現:(1)電磁式動能擷取感應發電之技術，透過外部磁鐵致動感應發電機，產生感應電勢做為輸入電源，驅動LED發光；(2)使用金電容做為儲能元件，並結合升壓式控制晶片構成不斷電儲能之警示照明電路，透過晶片控制電路讓金電容有效地將能量釋放驅動LED，解決現今自行車燈具無法蓄電儲能之問題；(3)交流感應電勢經全波整流電路對金電容充電，充分利用到感應電勢之正負半周，縮短金電容之充電時間。 本文探討與實驗動能擷取發電裝置及外部磁鐵數量與致動擺放方式，透過模擬平台，針對不同自行車轉速對產生感應電勢與金電容之充放電性能進行量測與分析。本電路可以依照性能需求，依據實驗結果調整外部致動磁鐵數量與擺放方式，發揮最大發電之效益。本電路採用電磁式感應發電機感應發電，將動能轉換為電能，無需使用到一次性電池消耗能源，符合綠能及節能概念，並兼具了低汙染及微型化的微發電能量電力系統之研發。
並列摘要
In this thesis, a bike lighting mechanism based on an electromagnetic energy harvester is developed and installed with uninterruptible power system. The technologies include: (1) an electromagnetic energy harvester using induction generation principle to activate the induction generator via external magnets to generate AC power voltage for arriving LEDs (2) using ultracapacitors as energy storage devices and a boost controller IC to comprise a uninterruptible and effective power source for the lighting and indicator circuit (3) making use of full-wave rectifier to rectify the induced AC voltage and charge the ultracapacitor with both positive and negative cycles being sufficiently employed, thus shorting the charging time. This research further investigates the influence of the relative position of the energy harvesting generation mechanism with respect to the external magnets on the generating efficacy by various placements of the magnets. By using the simulation platform, the generated induction voltage and the charging/discharging profiles of the ultracapacitor under various bike rotation speed are measured and analyzed. For meeting the performance requirement, the experimental outcomes can help to adjust the number and location of external activating magnet to achieve the optimal generating effectiveness. Moreover, the utilization of electromagnetic induction generation mechanism can directly transform the kinetic energy to electricity without using any primary battery. Therefore, the effort coincides with the concepts of green energy and energy-saving as well as possesses the features of low-pollution and miniaturization, thus contributing the development of the miniaturized power generation.