This paper details an investigation into possible technologies suitable for a DC power supply that is comparable in size and voltage output to a Cockcroft Walton Generator, but can produce much greater currents and stores only a fraction of the energy. Early work suggested that the most suitable technologies were those based on conventional transformers, specifically Insulated Core Transformers (ICTs) and High Frequency Cascade Transformers (HFCTs); both of which were investigated further. Different methods have been used to calculate the flux loss in an ICT and ways of reducing these losses investigated. It is concluded that the flux loss of an ICT is too great for use in a practical, high power density, power supply, and that future work in this field should focus on an HFCT based design.

A growing area of interest is HVDC supplies. This paper represents an initial study into possible designs of HVDC transformers that could provide 2 A at 1 MV, with the added specification that any proposed technology should be scalable to 5 A at 5 MV. Insulated core transformers (ICTs) have been initially selected as a potentially suitable technology. Careful design of the ICT magnetic core is required to ensure that flux loss is limited so that higher voltages are achievable. Simulation studies have shown that the voltage produced in an ICT does not scale linearly, meaning that there is an effective limit to the voltage that they can produce. In addition to this, a technique is proposed to increase the available current output of an ICT. The full analysis is presented in this paper.

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