Accurate Modelling of High-Current, High-Voltage Air-Cored Transformers

This paper presents a detailed two-dimensional model for high-voltage air-cored pulse transformers of two quite different designs. A filamentary technique takes magnetic diffusion fully into account and enables the resistances and self and mutual inductances that are effective under fast transient conditions to be calculated. Good agreement between calculated and measured results has been obtained, and the model is now used in the design of compact high-power sources.