Performance of a Voltage Step-Up/Step-Down Transformerless DC/DC Converter: Analytical Model

P. Suskis 1  and I. Rankis 1
  • 1 Rigas Technical University, 1 Kaļķu Str., LV-1050, Riga, LATVIA

Performance of a Voltage Step-Up/Step-Down Transformerless DC/DC Converter: Analytical Model

The authors present an analytical model for a voltage step-up/step-down DC/DC converter without transformers. The proposed topology is a combination of classic buck and boost converters in one single circuit but with differing operational principles. The converter is developed for a wind power autonomous supply system equipped with a hydrogen electrolytic tank and a fuel cell for energy stabilization. The main power source of the hydrogen-based autonomous supply system is energized by a synchronous generator operating on permanent magnets and equipped with a diode bridge. The input voltage of the converter in this case varies in the range 0-700 V, while its output DC voltage must be 540 V according to the demand of other parts of the system. To maintain the rated voltage, a special electrical load regulation is introduced. The calculations of the converter, the generator (equipped with a diode bridge) as element of the power system supply joint, and the load replaced by resistance are verified with PSIM software.

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  • Zakis, J., Rankis, I., & Vinnikov, D. (2011). Analysis of operating modes of step-up DC/DC converter with a commutating LC-filter. 1, 87-92.

  • Palma, L., Todorovic, M. H., & Enjeti, P. (2005). A high gain transformer-less DC-DC converter for fuel-cell applications. Power Electronics Specialists Conf. PESC '05, IEEE, 36, 2514-2520.

  • Kim, P., Choi, S., & Kim, J. (2010). An inductorless asymmetrical ZVS full bridge converter for step-up applications with wide input voltage range. Energy Conversion Congress and Exposition (ECCE), IEEE, 12-16 Sept., 1945-1951.

  • Snaffer, R. (2006). Fundamentals of Power Electronics with MATLAB. Course Technology (1st ed-n), Charles River Media.

  • Ericson, R. W., & Maksimovic, D. (2000). Fundamentals of Power Electronics, 2nd ed-n. Kluwer Academic Publishers.

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