Analysis of the Effects of Parasitic Elements of Pulse Transformer on Output Voltage in High Voltage DC Sources

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Aghaei, Morteza | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43560 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Kaboli, Shahriyar
Abstract:
Today, in different industries,as the use of high voltage DC power supplies is increasing, the need of output voltage precision also is increasing. One way to make High DC voltage is to use a multi-output DC-DC converter and makethe output series.Existing problems in measuring high voltages, results in this idea That in these converters, we measure and regulate only one of the outputs and estimate the others by circuit elements. In this estimatin, differences between the transformer parasitic elements are very effectiveon transformer various output voltages. In this thesis after a comprehensive study on the pulse transformer parasitic elements and choose a suitable model for it, the analytical relations for the outputs of a full bridge converter in single-output and multi-output mods by considering all the parasitic elements will be obtained an confirmed by simulation. Finally we study the effect of these parameters on unregulated output voltage and conclude that for every leakageinductance of transformer outputs,a parasitic capacitance exists that difference between output voltages is minimum and we should consider this amount in our design.
Keywords:
Full-Bridge Converter ; Multi Output DC-DC Converter ; Transformer Parasitic Elements ; Transformer Model