具功因修正之新型交流-直流LED燈驅動電路

A Novel AC-DC LED Driver with Power-Factor-Correction

張滿堂(Man-Tang Chang)

指導教授 ： 鄭竣安

義守大學/電機資訊學院/電機工程學系/碩士(2018年)

摘要

LED具有體積小、壽命長、亮度高與不易破碎等特點，成為現今熱門的固態照明光源。本論文研製具功因修正功能之交流-直流LED燈驅動電路，且將驅動電路當中的變壓器之磁化電感設計操作在不連續導通模式下，可自然達到功因修正的功能以及讓輸入電流的諧波成份符合IEC 61000-3-2 C類的規範。
本論文已完成交流-直流LED燈驅動電路的動作模式分析，並研製一個適用於交流輸入電壓有效值為110伏特的72W (36V/2A) LED燈雛型驅動電路，經由雛型電路的實測結果顯示，功因為0.9816，THD為12.094%，輸出電壓漣波率為9.7%，輸出電流漣波率為11.22%，可驗證本論文提出之LED燈驅動電路之實用性。

關鍵字

驅動電路 ； 功率因數校正

並列摘要

The attractive features of LED are small size, long life, high brightness and not easily broken; therefore, they become popular solid-state lighting sources nowadays. This paper develops and implements an AC-DC LED driver with power-factor correction. In addition, the magnetic inductance of the transformer inside the LED driver is designed to operate at discontinuous-conduction mode, and power-factor correction is inherently obtained. Moreover, the harmonics of input current meets the IEC 61000-3-2 class C requirements.
This paper has analyzed operational modes in the presented AC-DC LED driver and implements a 72W (36V/2A)-rated LED prototype circuit with an input utility-line voltage of 110 V. The experimental results of the prototype driver show that a power factor of 0.9816, a current THD of 12.094%, an output-voltage ripple factor of 9.7%, and an output-current ripple factor of 11.22% can be obtained. Thus, the functionality of the presented LED driver is verified.

並列關鍵字

driver ； LED ； power-factor corrections

參考文獻

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