Vol. 5, Issue 1 (2018)
Sub-harmonics fluctuations cancellation in LED resonant-switching driver controller using imperialistic competitive algorithm
Author(s): Abolfazl Zakariapour-Naeini, Pouya Derakhshan-Barjoei
Abstract: In recent years, light emitting diode technology has been used for many applications. These diodes are available in a variety of colors and are used to create uniform lighting. It means, controlling the current flow of these diodes when using their large voltages is challenging. However, this voltage has a negative temperature coefficient with increasing temperature. Therefore, constant current flow control is required to achieve uniform illumination. In this paper, we applied a circuit model of Marn-Go Kim. An evolutionary approach with discrete-time domain for the LED resonance driver transducer is presented. Using evolutionary methods and optimization of the proportional integrator controller in the feedback circuit of the resonant converter has been investigated. The results indicate that the output waveform of the resonant converter has a higher transient response rate and a decrease in sub-harmonic fluctuations. Proposed evolutionary model shows a good performance.