The Research to Improve EMC of the Switched-mode Power Supply by Controlling Parameters

The level of EMI is a performance index to the switchedmode power supplyHow to reduce EMI level of switchedmode power supply is an intensive issue at present.The idea that uses controlling parameters to change the state of the circuit to reduce EMI is presented by utilizing chaos inherent in the switchedmode power supply We take DC/DC Boost converter as a computer exampleBy changing the parameters:Iref,k and Vref,the converter is tuned to period,quasiperiod and chaos statesThe simulation results demonstrate that by controlling parameters EMI can be reduced without any additional circuits being involved.