电工技术学报2012，Vol.27Issue(6)：139-146,8.
无电解电容的改进型SEPIC LED照明驱动
The SEPIC PFC Without Electrolytic Capacitor for Offline LED Lighting Application
摘要
Abstract
High brightness lighting emitting diode （HB-LED） has attracted a lot of attention from both industry and academic for its high efficacy, simple to drive, environmentally friendly, long lifespan and small size. Typically, the power supply for LED requires high power density in addition to high efficiency, high power factor and low cost. The size of electrolytic capacitor used as storage capacitor is usually large, but also it has the key drawback with short lifespan. These hamper the improvement on LED lighting products. This paper presents a new proposal of LED lamp driver using the SEPIC-derived converter as PFC pre-regulator with twin-bus output. The SEPIC-derived break the low frequency power loop of the conventional SEPIC converter; therefore SEPIC-derived do not need the large capacity output capacitor to meet the output voltage ripple requirement. The basic operating principle and analysis is introduced in detail. A prototype of a 50W SEPIC-derived has been built and tested to verify the feasibility of the proposed LED lamp driver. The experimental results show that the efficiency is exceeding 92% and power factor is not less than 0.96.关键词
功率因数/LED/SEPIC/电解电容/Twin-BusKey words
Power factor/LED/SEPIC/electrolytic capacitor/twin-bus分类
信息技术与安全科学引用本文复制引用
马红波,郑聪,余文松..无电解电容的改进型SEPIC LED照明驱动[J].电工技术学报,2012,27(6):139-146,8.基金项目
国家高技术研究发展计划 （）
国家自然科学基金 （）
西南交通大学博士生创新基金资助项目 （）
