2014/9 吳擇序,龔哲民,黃忠民,黃祺峻
摘要
本文提出一種適用於高壓LED的新型分段式線性驅動電路，可根據交流輸入電壓的大小，透過控制電路適當地將LED進行串並聯控制，相較於傳統分段式線性驅動電路，可提高約20%的LED使用率。而本文也透過簡易的數學計算推導在不同的輸入電壓、LED 電壓及電流下的電源效率，再經由模擬軟體Psim 驗證及確認波形的正確性。根據模擬結果，在輸入210 VRMS 下，輸入功率12.13W、功率因數約0.95，諧波失真小於15%，其整體電源效率約為87.59%。
關鍵詞：發光二極體、分段式線性驅動。
Abstract
This paper proposes a novel high-voltage LED segmented linear circuit. Based on the AC input circuit, the control circuitry can switch the LED topology between series and parallel to achieve up to 20% energy efficiency improvement. This paper also provides the mathematical model of the efficiency according to the input voltage, LED voltage, and current parameters. Furthermore, the Psim software was ran to simulate the waveforms and confirm the theoretical model. The results
suggest an optimized 87.59% energy efficiency with the parameters of 210 VRMS, 12.13W input power, 0.95 power factor, and THD > 15%.
Keywords: LED、Segmented linear circuit
本文提出一種適用於高壓LED的新型分段式線性驅動電路，可根據交流輸入電壓的大小，透過控制電路適當地將LED進行串並聯控制，相較於傳統分段式線性驅動電路，可提高約20%的LED使用率。而本文也透過簡易的數學計算推導在不同的輸入電壓、LED 電壓及電流下的電源效率，再經由模擬軟體Psim 驗證及確認波形的正確性。根據模擬結果，在輸入210 VRMS 下，輸入功率12.13W、功率因數約0.95，諧波失真小於15%，其整體電源效率約為87.59%。
關鍵詞：發光二極體、分段式線性驅動。
Abstract
This paper proposes a novel high-voltage LED segmented linear circuit. Based on the AC input circuit, the control circuitry can switch the LED topology between series and parallel to achieve up to 20% energy efficiency improvement. This paper also provides the mathematical model of the efficiency according to the input voltage, LED voltage, and current parameters. Furthermore, the Psim software was ran to simulate the waveforms and confirm the theoretical model. The results
suggest an optimized 87.59% energy efficiency with the parameters of 210 VRMS, 12.13W input power, 0.95 power factor, and THD > 15%.
Keywords: LED、Segmented linear circuit
- Link:
http://tpece2014.ee.ntut.edu.tw/
- Conference papers (會議發表):
吳擇序,龔哲民,黃忠民,黃祺峻, 高LED利用率分段式線性驅動電路 「台灣電力電子研討會暨展覽會」,(第十三屆),pp.437-440,20140904
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