Analysis and Design of Insertion Loss of EMI Filter Based on Improved Differential Evolution Algorithm

The main way to suppress interference on power lines is to use EMI filters, which are typically characterized by insertion losses. However, in practical use, even if the insertion loss design of an EMI filter meets the standard, it is possible that the optimal filtering effect may not be achieved due to changes in source impedance and load impedance. Aiming at the above problems, this paper discusses the definition of insertion loss of EMI power filter, and gives the basic principle of improved differential algorithm. Relying on the improved difference algorithm, this paper presents an actual calculation example, and verifies that the simulation results have high accuracy through comparison with the measured data. In this paper, using modeling and simulation instead of experimental procedures can improve the design efficiency of EMI filters, while reducing the design cost of EMI filters.