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    Please use this identifier to cite or link to this item: http://ir.lib.ksu.edu.tw/handle/987654321/11000

    Title: 閉迴路降昇壓式轉換器發光二極體驅動電路之設計
    其他題名: Design of Closed-Loop Buck-Boost Converter for LED Driver Circuit
    Authors: 林士勛
    Shih-Shiun Lin
    Contributors: 黃啟貞
    Keywords: 發光二極體;降昇壓;閉迴路;功率因數;穩壓控制器
    Light Emitting Diode;Buck-Boost;Closed-Loop;Power Factor;Stabilizer
    Date: 2010
    Issue Date: 2010-10-07 15:59:17 (UTC+8)
    Abstract: 近來因地球暖化現象加劇,各國紛紛提出節能減碳政策,積極尋求潔淨能源,其中LED在照明設備中,具有省電、環保、耐用等優點的設備之ㄧ。目前LED產品與一般照明設備價格仍偏高,本論文提出簡單之電路以驅動LED照明,使其相關產品價格降低,近而取代傳統之照明器具。
    In recent years, since the phenomenon of accelerated global warming, the countries have proposed carbon reduction policies and actively seek clean energy. LED lighting devices which to be with saving energy, environmental protection, durable one of the advantages of the device. At present, the prices of general LED lighting products are still expensive. To instead of the conventional lighting apparatus, a simple driver circuit of the LED lighting proposed in this thesis to reduce the price of related products.
    In this thesis, the driver with Buck-Boost converter would be study. The specifications of LED used which the voltage and current ratings is 3.1~4.3V and 0.7A. The proposed circuit would drive the 3W of 12 series white light LED. The voltage operated in 4V and 0.6A for each LED, to AC 110V rectified by the bridge, then enter the direct current to drive LED of the circuit, And it would be operated with continue mode of Buck-Boost. these results simulated by the Isspice software to be compared.
    Because of the LED use, only 15% to 25% energy converted into light, various resistance by the temperature, the closed-loop controller of voltage would be used in the circuit proposed. The circuit scheme and operation mode would be done first in this thesis. To make use of the state-space averaging method to export the shortest time required of the stabilizer, and be simulated by the MATLAB required to achieve steady-state controller. Finally, The results showof the LED lighting fixture can achieve a high power factor 1. it is feasible from the experimental results, and is available at the output voltage controlled 48V.
    Appears in Collections:[電機工程系所] 博碩士論文

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