| Abstract |
This paper describes the design of a high-efficient DC-DC converter, which can be used to convert
voltage and current in DC networks. For example offshore windfarms. A comparison is made
between two possible DC-converters: the boost step up converter and the Electronic DC-Transformer.
This DC-Transformer, consists of a zero-voltage switching, phase-shift controlled, full-bridge IGBTinverter,
a high-frequency transformer and a voltage rectifier. In this paper an analysis of such an
Electronic DC-Transformer is made. Design results of a 1 MW Electronic DC-Transformer are
presented. And also design, simulation and test results of a 3.6 kW, scaled model are presented. The
DC-Transformer must be able to control voltage and current. A description of methods to control
voltage and current by introducing a varying delay between the two legs of the inverter is given. |
