Design and construction of high frequency transformers based on resonance converter

High-frequency power transformers are available in electronic power converters for many applications such as power transmission, renewable energy systems, and power supplies. Magnetic materials production technologies such as ferrite, amorphous, and high-frequency nanocrystals are used to miniaturize transformers and optimize the design. In this paper, the design of a high-frequency transformer based on the finite element method (FEM) is proposed, and a frequency transformer above 5 kV and a power of 100 watts with a ferrite core is designed for use in high voltage charges in pulse power technology. After the calculation step, the three-dimensional model of the transformer with the nonlinear core is created with Maxwell finite element analysis software and then the simulations of the electromagnetic model of the transformer with electronic power converter circuit are implemented with the help of Simplorer software for operating conditions. Also, the efficiency of the transformer, the exact equivalent circuit of the transformer, and the flux distribution in the transformer core are obtained. In addition, transformer samples have been fabricated and tested. The data obtained from the finite element method are compared with the analytical and laboratory methods. The results show that the finite element method seems more accurate compared to the analytical methods. Due to the importance and complexity of designing high-frequency transformers, using this method can provide advantages and simplicity for transformer designers for parameter calculation and optimal design.