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At present, the automation level in the power frequency magnetic field immunity test is relatively low. The placement and rotation of the tested equipment are manually done, which has health implications on lab technicians caused by long-term exposure to magnetic fields. This paper uses finite element simulation software to study the spatial distribution of the power frequency magnetic field. We started by building a simulation model of the power frequency magnetic field, then set up the air region, copper coil material, and magnetic field parameters. As a result of the simulation, we obtained the magnetic flux density model and the magnetic field arrow diagram. We then deduced the safe operation distance of test by referencing GB 8702-2014 and the simulation result. The simulation model’s and algorithm’s effectiveness are then verified by real-world measurement results of the spatial distribution of power frequency magnetic field.
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