A LOW-EMI PWM APPROACH FOR DC/AC INVERTER BASED ON LOGISTIC CHAOTIC MAP

G. Lv, H. Cheng, W. He, J. Zhang, and G. Pan

Keywords

EMI, logistic chaotic map, LCBPWM, switching frequency, peak current

Abstract

Increased attention has recently been focused on emission of electromagnetic radiation of pulse-width modulation (PWM) converters, which are commonly operated at a fixed frequency. This results in a peak in the current spectrum at the switching frequency, which directly affects the emission of radiation and indirectly affects the mechanical vibration and acoustic noise. We discuss a novel PWM method based on logistic chaotic map (LCB-PWM), in order to reduce the electro-magnetic interference (EMI) level of converters. Because the peak in the current spectrum at the switching frequency is widely spread to a large bandwidth, the EMI level is greatly decreased with LCB-PWM method. The simulation results show a reduction of the peak emission around the switching frequency up to 29 dB with this approach, without affecting driving performance.

Important Links:



Go Back