A Fuzzy Logic Approach for Ripple Minimization and Power Factor Correction in LED Lighting Systems

Abstract

This paper discusses the design and implementation of a fuzzy logic controller (FLC)-based ripple-free LED driver. The suggested LED driver has the ability to provide a constant current to the LED load while ensuring minimum ripple. The FLC is used to control the duty cycle of the switching converter, which regulates the output voltage. The design is optimized for high efficiency and low cost, making it suitable for use in a wide range of applications. The flyback converter in this paper operates in discontinuous conduction mode to achieve a nearly unity power factor, while a parallel-connected boost converter minimizes low-frequency ripple and reduces the need for output f ilter capacitance. The proposed FLC-based ripple-free LED driver achieved a power factor greater than 0.98 and output current ripple less than 5% with a wide range of input volt ages(90V–270V). Validation through the simulation in MATLAB Simulink software confirms the operational effectiveness of the LED driver under a 62W/0.5A LED load.