Increasing the Accuracy of Calculating the Electromagnetic Parameters of Powerful Toroidal Transformers for Pipe Welding

This paper explains the method, which increased the accuracy of calculating the electromagnetic parameters of the equivalent circuit for the multi-winding transformer. The perspective equivalent circuit is described. The parametrized 3-D geometric model of the existing toroidal transformer for pipe welding is developed. The magnetostatic and eddy current electromagnetic analyses in 2-D and 3-D formulation are simulated. The distributions of the electromagnetic leakage fields are found. Finite element calculation results are compared with real experiments.