發(fā)布時(shí)間：2018-11-01 11:56

【摘要】：本文的工作是設(shè)計(jì)一款可調(diào)光LED照明驅(qū)動(dòng)電源,并進(jìn)行仿真和調(diào)試。 本文首先介紹了LED照明的知識(shí)背景,然后介紹了驅(qū)動(dòng)電源的五種常用的直流變換電路。本文研究了可控硅調(diào)光,并分析了四種調(diào)光兼容方案。本文還研究了功率因數(shù)校正和電磁兼容的工程方法。 根據(jù)設(shè)計(jì)需求,本文選用反激變換器和單級(jí)PFC作為驅(qū)動(dòng)電源的拓?fù)?驅(qū)動(dòng)電源工作于電流斷續(xù)模式并采用峰值電流控制方式�；�于AP1682,本文著重設(shè)計(jì)了功率因數(shù)校正功能和反激變壓器,為提高可靠性,變壓器中增加了RCD箝位電路。本文還設(shè)計(jì)了EMI濾波電路、輸出濾波電路、線性補(bǔ)償電路和空載保護(hù)電路。最后,本文針對(duì)調(diào)光兼容問(wèn)題,設(shè)計(jì)了阻尼電路、泄放電路以及深度調(diào)光電路。 基于Saber,本文對(duì)單級(jí)PFC反激變換器進(jìn)行了仿真,分析了功率因數(shù)校正功能,分析了變壓器、開(kāi)關(guān)管、副邊功率二極管的工作情況,分析了EMI濾波電路的工作效果�；�于LTspice IV,在不同的充電電阻下,本文對(duì)可控硅調(diào)光器的輸出電壓波形進(jìn)行了仿真。 本文對(duì)驅(qū)動(dòng)電源實(shí)物進(jìn)行調(diào)試,分析了功率因數(shù)校正功能、輸出電流線性調(diào)整率和負(fù)載調(diào)整率、功率器件的工作情況、電磁兼容效果。接入調(diào)光器后,本文測(cè)試了調(diào)光曲線并驗(yàn)證了深度調(diào)光的效果。
[Abstract]:The work of this paper is to design, simulate and debug a dimming LED lighting driver. This paper first introduces the knowledge background of LED lighting, and then introduces five kinds of DC conversion circuits commonly used in driving power supply. In this paper, thyristor dimming is studied and four dimming compatible schemes are analyzed. The engineering methods of power factor correction and electromagnetic compatibility are also studied in this paper. According to the design requirements, the flyback converter and single-stage PFC are selected as the topology of the driving power supply, which works in the current intermittent mode and adopts the peak current control mode. In this paper, the power factor correction function and flyback transformer are designed based on AP1682,. In order to improve reliability, the RCD clamp circuit is added to the transformer. EMI filter circuit, output filter circuit, linear compensation circuit and no-load protection circuit are also designed. Finally, the damping circuit, discharge circuit and depth dimming circuit are designed for dimming compatibility. Based on Saber, the single-stage PFC flyback converter is simulated, the power factor correction function is analyzed, the working condition of transformer, switch tube and auxiliary side power diode is analyzed, and the working effect of EMI filter circuit is analyzed. Based on LTspice IV, the output voltage waveform of thyristor is simulated under different charge resistance. In this paper, the function of power factor correction, the linear adjustment rate of output current and load adjustment rate, the working condition of power device and the effect of EMC are analyzed. After the dimmer is connected, the dimming curve is tested and the effect of depth dimming is verified.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM923.34

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