Abstract:
In this paper a SEPIC converter, operating as an AC-DC adaptation stage, is studied. It is shown that the system has high efficiency and good power factor being able to w...Show MoreMetadata
Abstract:
In this paper a SEPIC converter, operating as an AC-DC adaptation stage, is studied. It is shown that the system has high efficiency and good power factor being able to work both as a boost (step-up) or buck (step-down) converter. To impose a loss free resistor (LFR) behavior, sliding-mode control is applied. It is shown that the LFR acts as an ideal rectifier with a power factor near the unity. The output of the system is used to power supply a group of HBLEDs, and its brightness (luminosity) is controlled by the output current. The design and the models are validated by mathematical, numerical and experimental results.
Date of Conference: 15-18 May 2011
Date Added to IEEE Xplore: 04 July 2011
ISBN Information: