Conducted Emission Mitigation in LED Driver by Chaotic Modulation
Mohammad Yanuar Hariyawan, Siska Novita Posma

Politeknik Caltex Riau

Abstract

Light emitting diode (LED) lamps are become popular in a wide range of applications, due to low power, high efficiency, and low maintenance. To achieve high efficiency in energy transfer in the LED driver, a switched-mode power supply (SMPS) topology is applied. SMPS operates at a constant frequency; it generates significant emission in some of the frequencies through conducted and radiated mechanisms. Several solutions are proposed to mitigate the EMI (electromagnetic interference), such as converter design, component selection, EMI filtering, and spread spectrum techniques. Spread spectrum is a cheap and efficient solution in the conducted emission mitigation. This research performs the conducted emission mitigation is done by modifying the switching on the LED Driver using chaotic signals. The Lorenz equation is selected to produce chaotic signals. The effect of EMI caused by the chaotic signal is analyzed toward the performance of the system, compared with performance when it is modulated by periodic signals. Lorenzs injection signals have reduced distribution over a larger frequency range compared to other injection signals. The average EMI reduction produced by Lorenz signal is the highest compared with other modulated signals of 10.63 dB.

Keywords: SMPS, EMI, conducted emission, chaotic, lorenz

Topic: Telecommunication Engineering

Link: https://ifory.id/abstract-plain/cY6nW7GNqjvg

Web Format | Corresponding Author (Mohammad Yanuar Hariyawan)