Research On Simplifying The EMC Simulation Model Of Electronic Equipments

EMC simulation has become one of the most important steps in electronic equipments designing. Through simulation, electromagnetic compatibility problems can be found and resolved before the equipments are producted , thereby , reducing the cost of repeatedly revised design to meet the electromagnetic compatibility standards. In order to simulate the electromagnetic compatibility of electronic equipment quickly and accurately, it is necessary to build a simple and reliable simulation model, so less time and computation load is needed. The presence of the PCB boards and the tiny structures such as the tiny bulge or groove which is used for fixing the PCB, leads to the complexity of equipments. If the simulation model is modeled like what it is in actual, a lot of manpower will be wasted. Meanwhile, complex model results in the aberrant grid which leads to wrong simulation results. Therefore, simulation model has to be simplified or equivalent. This thesis presents a disposing method of EMC simulation model based on the theory of electromagnetic perturbation, simple model can be built in the EMC simulation software by this method. First of all, this thesis discusses the EMC simulation model of electronic equipments and stresses the main factors in simulation. Secondly, it introduces the basic theory of the perturbation,discusses how to simplify the model and presents the simplified rule,the accuracy of this method is validated by emulational cases. Finally, it introduces the application of the modeling method in the practical project, the results are compared with the test datas. Through this way, the modeling and simulation is much faster and the results are very good.