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Analysis of Phase-Shifted Full-Bridge Based dc-dc Converter considering transformer parasitic elements in discontinuous current mode

Aghaei, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1109/PEDSTC.2014.6799402
  3. Abstract:
  4. In high-voltage applications, due to the use of high-ratio step-up transformers, the value of parasitic capacitance of these transformers is large compared to the low-voltage transformers. Moreover In these applications it is prefered to use single-capacitor filters instead of filters with inductors. In this paper a simple electrical model for two-winding high frequency transformer considering all of the parasitic elements is presented. This model is used in a full-bridge based dc-dc converter with capacitive output filter controlled by phase-shifted method. The operation of this converter in DCM is analysed and its analytical relations in different time intervals is derived and confirmed by simulation and experimental results
  5. Keywords:
  6. Full bridge based dc-dc converter ; High frequency transformer ; DC-DC converters ; HVDC power transmission ; Phase shift ; Analytical relations ; Capacitive output filter ; Discontinuous current mode ; Electrical modeling ; Full bridge ; Parasitic capacitance ; Parasitic element ; Step up transformers ; Power electronics
  7. Source: PEDSTC 2014 - 5th Annual International Power Electronics, Drive Systems and Technologies Conference ; 2014 , p. 366-372
  8. URL: http://ieeexplore.ieee.org/xpl/abstractAuthors.jsp?reload=true&arnumber=6799402