应用于光伏系统的led升压开关电容变换器

2015 IEEE 24th International Symposium on Industrial Electronics (ISIE) Pub Date : 2015-10-01 DOI:10.1109/ISIE.2015.7281636

A. F. Rocha, E. M. Sá, C. A. Silva, Geraldo E. Martins, Edson R. Marques

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引用次数: 3

摘要

本文提出了一种带开关电容的DC-DC升压变换器，为发光二极管(led)供电，可应用于自主系统，如光伏系统。在变换器中使用了一个小的附加电感，工作在不连续导通模式(DCM)，允许零电流开关(ZCS)，减少电路损耗。此外，LED电流可以通过开关频率作为输入电压的函数来稳定。因此，转换器不需要电流传感器，从而降低了成本。在实验室组装的原型设计用于54 W的灯，工作频率约为153 kHz，效率为93%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A step-up switched-capacitor converter for LEDs applied to photovoltaic systems

This paper proposes a DC-DC step-up converter with a switched capacitor to power light-emitting diodes (LEDs), which may be applied to an autonomous system, e.g. PV system. In the converter is used a small additional inductor operating in discontinuous conduction mode (DCM) which allows zero current switching (ZCS), reducing circuit losses. Moreover, the LED current can be stabilized through the switching frequency as a function of input voltage only. Thus, the converter does not need current sensors, allowing cost reduction. The prototype assembled in laboratory was designed for a lamp of 54 W, operating in a frequency of approximately 153 kHz and presented an efficiency of 93%.

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2015 IEEE 24th International Symposium on Industrial Electronics (ISIE)

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