Design method for improving system-level electromagnetic interference simulation efficiency

Abstract

The invention discloses a design method for improving system-level electromagnetic interference simulation efficiency and belongs to technical field of server electromagnetic compatibility simulation. The design method for improving the system-level electromagnetic interference simulation efficiency is characterized in that according to analysis and simulation verification of an equivalence principle of an electromagnetic field source, three independent simulation modules are nested in sequence and the three independent simulation modules are put together, namely sub-modules are combined with a simulation process to carry out electromagnetic interference simulation on the three simulation modules; the three independent simulation modules respectively include a mainboard simulation module, a connector and mechanism simulation module and a cable simulation module. According to the design method for improving the system-level electromagnetic interference simulation efficiency, the increase of the workload, which is caused by the huge simulation model, can be greatly reduced and the simulation efficiency, the precision and the applicability can be improved, and the method has good popularization and application value.

Description

technical field [0001] The invention relates to the technical field of server electromagnetic compatibility simulation, and specifically provides a design method for improving the efficiency of system-level electromagnetic interference simulation. Background technique [0002] For system-level EMC simulation, in addition to simulating motherboard signals, the modeling of chassis, cables, and connectors must also be considered. Traditional system-level simulation only simulates a certain module of the system, which has poor applicability. For example, only a certain module of the system is simulated, such as the influence of the size and shape of the cooling hole on the shielding effect, and the applicability is poor. Or a large number of the most simplified models are used to replace the real engineering simulation files, resulting in low simulation accuracy. If the source files are not used, a large number of the most simplified models are used instead. For example, the cha...

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Problems solved by technology

Traditional system-level simulation only simulates a certain module of the system, which has poor applicability. For example, only simulates a certain module of the system, such as the influence of the size and shape of the cooling hole on the shielding effect, and the applicability is poor.

Or a large number of the most simplified models are used to replace the real engineering simulation files, resulting in low simulation accuracy. If the source files are not used, a large number of the most simplified models are used instead. For example, the chassis is replaced by a metal cuboid, and only certain holes and gaps are made. The signal simulation uses a metal plate model plus a metal wire model instead, with the necessary ports and loads, so the simulation results are not accurate

If a large number of actual project files are imported, the amount of calculation will increase exponentially, and the difficulty of modeling will also increase greatly. If all modules are taken into account, for example, a certain signal interference on the motherboard causes crosstalk noise, and the noise from The external cable of the connector escapes, causing radiation interference in the far field, but this kind of simulation needs to import all the original motherboard, connector, internal and external cable project files into the simulation software, which will cause a huge amount of calculation , at the same time, because the model is too complex and huge, it is easy to cause an error, which makes the simulation unable to run

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