The distribution parameters of high-frequency transformer can affect its output parameters and performance. It is found by deriving the analytical expressions for the secondary distributed capacitance and leakage inductance of high-frequency transformer that the winding mode

segment and layered structure

insulation layer thickness

winding height and insulation medium are the main factors affecting its distribution parameters. A finite element simulation model of electromagnetic field is set up for high-frequency transformers at 40 kV and 20 kHz

and the influence of various factors on distributed capacitance and leakage inductance is calculated and analyzed. The insulation thickness and height of the transformer winding are determined by way of optimizing the segment and layered structure of the secondary winding and of comprehensively considering leakage inductance

distributed capacitance and the winding losses and

on this basis

the experimental prototype is designed and processed. The test results show that the errors between the simulation calculation results of distributed capacitance and leakage inductance and the actually measured values are 9.5% and 11.3%

respectively. The simulation analysis method and relevant conclusions provide a reference for the calculation of distributed parameters and structural design of high-frequency transformer.