LED照明驅動器之新型SEPIC轉換器研製

Development of Innovative SEPIC Converter of LED Lighting Driver

李逢濱(Feng-Pin Lee)

指導教授 ： 涂世雄

中原大學/工學院/電機工程研究所/碩士(2013年)

https://doi.org/10.6840/cycu201300746

摘要

中文摘要

本論文提出一種新型SEPIC(Single-Ended Primary Inductance Converter)拓撲結構來驅動LED照明。研製輸入電壓100~240Vac，輸出20瓦的新型SEPIC轉換器，符合LED燈能源之星標準與IEC61000-3-2 Class C電流諧波規範，並且具有壽命長、高功率因數、高效率、低成本的發光二極管照明應用。

在本論文中，分析傳統SEPI PFC轉換器工作原理，並對其進行改進，進而提出了一種新型SEPIC-Buck轉換器，此轉換器大大降低電容值，達到可消除輸出電解電容，增加驅動器壽命。在本文中詳細描述新型SEPIC-Buck轉換器工作原理，分析和設計方法。最後研製一20瓦LED照明轉換器，以驗證該方案的可行性。

本文主要貢獻如下:
1. 提高可靠度:此轉換器降低輸出二極體及的電壓應力，進一步減少輸出二極體雜訊。
2. 提升LED驅動電路壽命: 此轉換器降低電解電容值，增加驅動器壽命。
3. 降低成本與優化設計空間:新型SEPIC轉換器，單級式架構並且降低電解電容使用，節省成本並優化驅動器設計空間。

關鍵字

功率因數校正 ； LED照明 ； 能源之星 ； 無電解電容

並列摘要

Abstract

The thesis proposes an innovative SEPIC (Single-Ended Primary Inductance Converter) topological structure to drive LED lighting. The innovative SEPIC converter with 100~240Vac input voltage and 20W output power is developed, which meets the LED lamp Energy Star Criteria and IEC 61000-3-2 Class C current harmonic regulations, and has long life, high power factor, high efficiency and low cost to be suitable for LED lighting application.

In the thesis, the operation principle of the conventional SEPI PFC (Power Factor Correction) converter is analyzed and modified to propose an innovative SEPIC-Buck converter, which can not only reduce the voltage stress of diode, but also reduce capacitance significantly. Therefore, it may reduce output electrolyte capacitor and increase the life of driver. In the thesis, the operation principle, analysis and design methods of the innovative SEPIC converter are described in detail. At last, a 20W LED lighting converter is developed to verify the possibility of the project.

The major contributions of this paper are as below:
1. Improvement of reliability: this converter reduces the voltage stress of the output diode, and further reduces the noise of the output diode.
2. Increase of SED driving circuit life: this converter eliminates output electrolyte capacitor and increases the life of the driver.
3. Cost-down and design space optimization: innovative SEPIC converter, sing-stage structure and reduction of the use of electrolyte capacitor save cost and optimize driver design space.

並列關鍵字

LED Lighting ； SEPIC converter ； SEPIC-Buck converter ； Energy Star ； Electrolyte capacitor Avoidance ； Power Factor Correction

參考文獻

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