Abstract
Power Electronic Transformer (PET) is a new type of energy conversion device in power system. The electronic transformers used in PET play an important role in performance of the overall power electronic system, including efficiency, size, and cost. The transformers are high power medium frequency transformer according to present technology. Based on a proposed circuit topology of PET, the design method of the electronic transformer is presented. A 30KW medium frequency transformer is designed. The selection of core material was based upon the optimization among the specifications: transformer size, efficiency, and producing cost. Thermal analysis is made by ANSYS. The temperature rise is checked by calculating the distribution of temperature field. The design of electric insulation of the electronic transformer is proved to be good by simulation.
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