LED驅(qū)動(dòng)電源的研究與設(shè)計(jì)
發(fā)布時(shí)間：2018-10-15 17:05
【摘要】：隨著全球資源的短缺,人們節(jié)能環(huán)保的意識(shí)日益提升,作為節(jié)能環(huán)保的LED照明越來(lái)越受到市場(chǎng)的青睞。LED是一種半導(dǎo)體發(fā)光器件,由于其結(jié)構(gòu)特點(diǎn),因此它不會(huì)和傳統(tǒng)燈泡一樣容易產(chǎn)生燈絲發(fā)光易燒、熱沉積、光衰等情況。LED燈的優(yōu)點(diǎn)之一是壽命長(zhǎng)久,一般為傳統(tǒng)白熾燈的十倍以上。從2012年10月開(kāi)始,國(guó)家將按照計(jì)劃逐步停止進(jìn)口和銷(xiāo)售普通白熾燈。通過(guò)國(guó)家補(bǔ)貼加快LED照明普及的步伐。因?yàn)槟壳笆袌?chǎng)上LED照明燈的價(jià)格是普通白熾燈的幾倍甚至十幾倍,所以尚未被普通民眾廣泛接受。但隨著LED相關(guān)技術(shù)的不斷提高,LED照明的成本勢(shì)必會(huì)降低,從而為更多的老百姓所接受。雖然現(xiàn)階段LED照明產(chǎn)品還不是很完美,LED照明行業(yè)發(fā)展也并不完善,但隨著政府政策的支持,以及越來(lái)越多大型企業(yè)和高端人才進(jìn)入這個(gè)行業(yè),LED技術(shù)會(huì)越來(lái)越成熟,LED照明普及也將是大勢(shì)所趨�，F(xiàn)在看來(lái)制約LED發(fā)展的一個(gè)技術(shù)瓶頸是LED驅(qū)動(dòng)電源,因?yàn)長(zhǎng)ED驅(qū)動(dòng)電源相當(dāng)于LED照明的心臟,LED驅(qū)動(dòng)電源的好壞直接影響著LED燈的光效和壽命。開(kāi)發(fā)出低成本、高效率的LED驅(qū)動(dòng)電源是十分必要的。 本文從LED驅(qū)動(dòng)電路的設(shè)計(jì)成本和效率等方面綜合考慮,設(shè)計(jì)開(kāi)發(fā)了一款兩級(jí)驅(qū)動(dòng)拓?fù)涞腖ED驅(qū)動(dòng)電源。論文根據(jù)LED的電氣特性作和驅(qū)動(dòng)方式,選擇確定了課題的設(shè)計(jì)方案,即功率因數(shù)校正拓?fù)洳捎肂oost電路,后級(jí)拓?fù)洳捎肔CC諧振電路,并選取恩智浦公司的UBA2013芯片進(jìn)行控制。其次闡述了進(jìn)行功率因數(shù)校正的必要性,并系統(tǒng)得介紹了功率因數(shù)校正中Buck、Buck-Boost、 Boost功率拓?fù)涞墓ぷ髟�。研究了�?qū)動(dòng)芯片配合Boost功率拓?fù)涞墓ぷ鞣绞?對(duì)所用拓?fù)渲休敵鰹V波電容、Boost電感、MOSFET開(kāi)關(guān)管、輸出二極管等主要工作器件參數(shù)進(jìn)行了設(shè)計(jì)選擇。然后通過(guò)對(duì)后級(jí)拓?fù)銵CC諧振變換電路工作原理中各種工作模式的詳細(xì)分析與研究,給出了LCC諧振變換器中諧振電感、諧振電容等參數(shù)的設(shè)計(jì)方案。隨后提及了LED驅(qū)動(dòng)電源設(shè)計(jì)中關(guān)鍵的電磁兼容性問(wèn)題,分析了傳導(dǎo)干擾中的共模干擾和差模干擾,通過(guò)對(duì)兩種干擾工作原理的分析,設(shè)計(jì)了電磁干擾濾波器。也給出了抑制輻射干擾的一些設(shè)計(jì)。最后在前面研究分析的基礎(chǔ)上設(shè)計(jì)了一個(gè)Boost+LCC兩級(jí)拓?fù)涞腖ED驅(qū)動(dòng)電源樣機(jī)。經(jīng)過(guò)接通LED負(fù)載,給出了整機(jī)的測(cè)試結(jié)果,其中包括測(cè)試性能、LED驅(qū)動(dòng)電源的實(shí)物圖、主要波形、EMI測(cè)試結(jié)果等。通過(guò)測(cè)試結(jié)果驗(yàn)證了本設(shè)計(jì)的理論分析的正確性和系統(tǒng)方案的可行性和可靠性。
[Abstract]:With the shortage of global resources, people's awareness of energy saving and environmental protection is increasing. As a kind of energy-saving and environmental protection LED lighting is more and more popular in the market. LED is a semiconductor light-emitting device, because of its structural characteristics, Therefore, it is not as easy as traditional bulbs to produce filament luminescence, thermal deposition, light decay and so on. One of the advantages of LED lamp is its long life, which is generally more than ten times that of traditional incandescent lamp. Starting in October 2012, the country will phase out the import and sale of ordinary incandescent lamps as planned. State subsidies to accelerate the pace of LED lighting popularization. Because the price of LED lamps in the market is several times or even ten times that of incandescent lamps, it has not been widely accepted by the general public. But with the continuous improvement of LED related technology, the cost of LED lighting will be reduced, which is accepted by more people. Although the LED lighting products are not perfect and the development of LED lighting industry is not perfect, but with the support of government policies, And more large enterprises and high-end talent enter this industry, LED technology will become more mature, LED lighting will be popular is the trend. It seems that one of the technical bottlenecks restricting the development of LED is the LED driver, because the LED driver is the heart of LED lighting, and the LED driver directly affects the light efficiency and lifetime of the LED lamp. It is necessary to develop a low cost and high efficiency LED driver. Considering the design cost and efficiency of LED driver circuit, a two-stage driving topology LED driver power supply is designed and developed in this paper. According to the electrical characteristics and driving mode of LED, the thesis chooses the design scheme of the subject, that is, the power factor correction topology adopts Boost circuit, the latter stage topology uses LCC resonant circuit, and the UBA2013 chip of Enzipup is selected for control. Secondly, the necessity of power factor correction is expounded, and the working principle of Buck,Buck-Boost, Boost power topology in power factor correction is systematically introduced. The working mode of driving chip combined with Boost power topology is studied. The parameters of output filter capacitor, Boost inductor, MOSFET switch, output diode and so on are designed and selected. Then the design scheme of resonant inductance and resonant capacitance in LCC resonant converter is given through the detailed analysis and research of various working modes in the working principle of the backward topology LCC resonant converter. Then the key EMC problem in the design of LED driving power supply is mentioned, and the common mode interference and differential mode interference in the conduction interference are analyzed. The electromagnetic interference filter is designed by analyzing the working principle of the two kinds of interference. Some designs for suppressing radiation interference are also given. Finally, a LED driver prototype of Boost LCC two-stage topology is designed based on the previous research and analysis. After the LED load is connected, the test results of the whole machine are given, including the test performance, the physical diagram of the LED driver power supply, the main waveforms, the EMI test results and so on. The test results verify the correctness of the theoretical analysis and the feasibility and reliability of the system.
【學(xué)位授予單位】：東華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM46;TM923.34
本文編號(hào)：2273209
[Abstract]:With the shortage of global resources, people's awareness of energy saving and environmental protection is increasing. As a kind of energy-saving and environmental protection LED lighting is more and more popular in the market. LED is a semiconductor light-emitting device, because of its structural characteristics, Therefore, it is not as easy as traditional bulbs to produce filament luminescence, thermal deposition, light decay and so on. One of the advantages of LED lamp is its long life, which is generally more than ten times that of traditional incandescent lamp. Starting in October 2012, the country will phase out the import and sale of ordinary incandescent lamps as planned. State subsidies to accelerate the pace of LED lighting popularization. Because the price of LED lamps in the market is several times or even ten times that of incandescent lamps, it has not been widely accepted by the general public. But with the continuous improvement of LED related technology, the cost of LED lighting will be reduced, which is accepted by more people. Although the LED lighting products are not perfect and the development of LED lighting industry is not perfect, but with the support of government policies, And more large enterprises and high-end talent enter this industry, LED technology will become more mature, LED lighting will be popular is the trend. It seems that one of the technical bottlenecks restricting the development of LED is the LED driver, because the LED driver is the heart of LED lighting, and the LED driver directly affects the light efficiency and lifetime of the LED lamp. It is necessary to develop a low cost and high efficiency LED driver. Considering the design cost and efficiency of LED driver circuit, a two-stage driving topology LED driver power supply is designed and developed in this paper. According to the electrical characteristics and driving mode of LED, the thesis chooses the design scheme of the subject, that is, the power factor correction topology adopts Boost circuit, the latter stage topology uses LCC resonant circuit, and the UBA2013 chip of Enzipup is selected for control. Secondly, the necessity of power factor correction is expounded, and the working principle of Buck,Buck-Boost, Boost power topology in power factor correction is systematically introduced. The working mode of driving chip combined with Boost power topology is studied. The parameters of output filter capacitor, Boost inductor, MOSFET switch, output diode and so on are designed and selected. Then the design scheme of resonant inductance and resonant capacitance in LCC resonant converter is given through the detailed analysis and research of various working modes in the working principle of the backward topology LCC resonant converter. Then the key EMC problem in the design of LED driving power supply is mentioned, and the common mode interference and differential mode interference in the conduction interference are analyzed. The electromagnetic interference filter is designed by analyzing the working principle of the two kinds of interference. Some designs for suppressing radiation interference are also given. Finally, a LED driver prototype of Boost LCC two-stage topology is designed based on the previous research and analysis. After the LED load is connected, the test results of the whole machine are given, including the test performance, the physical diagram of the LED driver power supply, the main waveforms, the EMI test results and so on. The test results verify the correctness of the theoretical analysis and the feasibility and reliability of the system.
【學(xué)位授予單位】：東華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM46;TM923.34
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