The effect of different winding techniques on the stray capacitances of high frequency transformers used in flyback converters

In this paper, the effect of different winding techniques on the stray capacitances of high frequency transformers used in flyback converters has been studied. Since stray capacitances are affected by winding methods, all the typical kinds of winding techniques used for these transformers and their effects on the stray capacitances were analyzed. Furthermore, some modifications were applied to the typical winding techniques. Finally, the winding techniques minimizing the stray capacitances in these transformers were determined. PI expert software has been used to design and calculate the parameters of high frequency transformers (such as type and size of the cores, number of primary and secondary turns, etc.). Moreover, Maxwell software has been utilized for electric and magnetic field analysis and measuring the stray capacitances of these transformers.