This paper deals with the design and implementation of a Luo converter operating in two different modes with an improved power quality (PQ) and flickerless operation over the universal ac mains for general purpose lighting applications. A cost-effective analog pilot-line dimming concept is incorporated and discussed in detail. The proposed dimming concept offers good PQ, even during dimming, with low cost for the energy efficient lighting solutions. The Bode plot analysis of this proposed Luo converter is presented using state-space analysis to ensure its stability with closed-loop control. The prototype is developed and tested in the laboratory for a 36-W light-emitting diode lamp load with rated current of 700爉A. The measured power factor in case of 30% dimming is 0.97 with total harmonic distortion of 8.7% only. The measured efficiency is 91% at rated ac mains voltage of 230燰.

中文翻译：

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通用输入 CrCM Luo 转换器，具有适用于通用 LED 照明应用的低成本试运行调光概念


本文讨论了以两种不同模式运行的 Luo 转换器的设计和实现，该转换器在通用照明应用的通用交流电源上具有改进的电能质量 (PQ) 和无闪烁操作。结合并详细讨论了一种具有成本效益的模拟引导线调光概念。所提出的调光概念即使在调光期间也能提供良好的 PQ，并且节能照明解决方案的成本较低。使用状态空间分析对所提出的洛变换器进行波特图分析，以确保其闭环控制的稳定性。该原型机是在实验室针对额定电流为700爉A的36W发光二极管灯负载进行开发和测试的。在 30% 调光情况下测得的功率因数为 0.97，总谐波失真仅为 8.7%。在额定交流电源电压为 230燰 时测得效率为 91%。