Direct Calculation of Short Circuit Reactance, Winding Strength, and Inherent Forms of Output Transformers (Direkte Berechung der Kurzschlussreaktanzen, Wicklungskraefte und Eigenformen von Leistungstransformatoren).

摘要

The dissertation seeks to employ boundary-element methods (regarding finite elements and differences) in determining how detailed the modeling of an output transformer must be in order to deliver sufficiently precise results. A two-dimensional transformer model, from which the unwinding of the transformer shall take place, is suitable for the calculation of magnetic fields, and yields valuable clarifications. The mathematical components to the study are described in terms of boundary- value tasks as stipulated within the boundary-element method, thereby making discrete the vector potential on the boundaries. The final chapter concerns the frequency and inherent forms of output transformers with and without the interpolation of inductive coupling.