High luminance white LED has fascinated a lot of attention from both industry and academic sectors because of its high efficacy, small driver circuit, eco-friendly and easy maintenance. Inspite of all above mentioned advantages, it is required to maintain unity power factor and low-harmonic input current for LED applications. Today it was a need to investigate a suitable AC-DC converter topology to achieve the above mentioned standards. AC-DC interleaved SEPIC bridgeless converter is designed, simulated and compared with bridgeless fly back converter and cuk converter. The advantage of interleaving concept in converter leads to benefits such as ripple cancellation, good thermal distribution and scalability. The variation of duty cycle for all the converter was done and various parameters such as maximum output voltage Vo(max), minimum input voltage Vin(min), ripple, supply power, output power, efficiency, Total Harmonic Distortion (THD) and supply power factor are computed and analyzed by performing the simulation in MATLAB/SIMULINK. From the results, it is inferred that the bridgeless interleaved Sepic converter results in high efficiency, reduced THD and power factor closer to unity. The results are verified.
Volume 12 | 01-Special Issue
Pages: 593-600
DOI: 10.5373/JARDCS/V12SP1/20201108