Analysis of the effects of strong stray magnetic fields generated by tokamak device on transformers assembled in power electronic converters

In the future, the plasma current inside the tokamak device is expected to reach the MA level, while the constrained magnetic field is expected to reach several teslas. This will generate a high-intensity stray magnetic field in the space around the tokamak device, which may cause serious magnetic field interference problems for the power electronic equipment. Transformers are susceptible to external magnetic fields, which can change their operating state and cause abnormal operation of the power electronic equipment in stray magnetic field. This paper examines the impact of parameter changes in a strong stray magnetic field on the working characteristics of power electronic equipment through the simulation of the transformer’s electromagnetism using ANSYS software. The study focuses on the transformer as the research object and verifies the simulation results through testing. The research provides a useful reference for solving the EMC problem of power electronic equipment in a strong stray magnetic field.