Analysis And Decrease of Electromagnetic Interference In Diode Bridge Rectifier

Electromagnetic Interference (EMI) refers to the undesired radiated or conducted energy in some type of electrical systems. Semiconductors are applied in power electronic converters to increase efficiency (Mohan, Undeland and Robbins, 2003).But switching leads to generation of interference over a wide range of frequency and causes radio frequency interference (10KHz to 30MHz). EMI is an inevitable problem in modern power electronic circuits. Modeling and simulation of EMI is the first step in EMC evaluation to help power electronics designers get an estimate on the status of EMC in their designs. Modeling and simulation of diode bridge rectifier are studied in this paper from the EMC point of view. Simulation results demonstrated noncompliance behavior of this rectifier in terms of EMC standards. At the end, by using suitable filters, we can preclude or minimize any undesired effects to meet the standards of acceptable conditions.