György Elmer

Novel High Frequency Model of Transformers of Electronic Devices: Development of a Novel Regular, High Frequency Modell for Small Size Transformers György Elmer

For taking into account electromagnetic wave propagation within a transformer a length unit inductance is proposed to be connected in series to the length unit turn-to-turn capacitance and a unit length inductance is proposed to be connected in series to the unit length layer-to-layer capacitance within the distributed and quasi distributed parameter model of transformers. As a result the model is able to take into account the wave propagation along the turn-to-turn and layer-to-layer capacitance current path of the coil. This model is able to meet the circuit regularity requirements as well. The quasi distributed parameter model contains several identical lumps for modelling the wave propagation but being easily applicable for the practical use with circuit simulator software. A high frequency model of transformer shielding is proposed for the use with circuit simulator software modelling the high frequency behaviour of the shielding. A comprehensive model containing the proposed elements can help in evaluating electromagnetic compatibility (EMC) of a future transformer during its design period.