High-frequency Transformer Equivalent Model And Their Parameters Calculation&Measurement

Now all types of electrical and electronic equipment and power supply are beingincreasingly required to be small and light in volume and weight in engineering field. With thecontinuous development of power electronics technology, the transformer, as one of the maincomponents in the power supply system, which work at a high frequency, can advance the powerdensity of the power supply and reduce the size and weight of the power. So the study ofhigh-frequency transformer is important and valuable.This paper focuses on the analysis of high-frequency transformer equivalent circuit, and theimpact of the stray capacitance and leakage inductance to the power supply. The theoreticalformula of leakage inductance and capacitance is analyzed. Electromagnetic simulationsoftware to analyze the leakage inductance and AC resistance is introduced, and the theoreticalprinciple of the measurement of capacitance is also analyzed. Some research about magneticproperties of popular power high-frequency magnetic material such as Nanocrystalline andMn-Zn ferrite has been showed. Four10KVA high frequency transformers have been produced,and the parameter of them is been measured and analyzed so that their advantage anddisadvantage can be summed up and the impact of different winding arrangement to distributionparameters and eddy loss of different winding arrangement can be drawn.Some of the key technologies for high-frequency transformer has been studied to solvesome problems of high-power transformers’ designing and producing, much valuable experiencehas been accumulated for engineering.