access icon free Generalised transformerless ultra step-up DC–DC converter with reduced voltage stress on semiconductors

A non-isolated DC–DC converter with high-voltage gain and low-voltage stress across the semiconductors is proposed in this study. The proposed converter consists of n stages of diode–capacitor–inductor (D–C–L) units at the input side and m units of voltage multiplier cells (VMCs) at the output side. Increasing of D–C–L units and VMCs, lead to high-voltage gain at low duty cycle. Lower values of duty cycle will result in increasing of converter controllability and increasing of operation region. Also by increasing of VMCs, the voltage stress across the main switch and other semiconductors is reduced severely. Decreasing of voltage stress across the main switch leads to use a switch with lower R DS-ON that reduces on state losses of the proposed converter. Besides, by decreasing of voltage stress across the diode rectifiers, diodes with less forward voltage drop can be adopted. The circuit performance will be compared with other solutions that were previously proposed for voltage step-up in the terms of voltage gain, main switch voltage stress and number of components. Finally, a 357 V–65.5 W laboratory prototype with 92% conversion efficiency is built in order to prove the satisfying operation of the proposed converter and carried mathematical analysis.

Inspec keywords: capacitors; rectifiers; DC-DC power convertors; inductors; voltage control

Other keywords: power 65.5 W; boundary conduction mode; low-voltage stress; generalised transformerless ultra step-up DC–DC converter; diode-capacitor-inductor units; DCL units; VMC; nonisolated DC–DC converter; diodes converter controllability; voltage 357 V; semiconductors reduced voltage stress; discontinuous conduction mode; continuous conduction mode; high-voltage gain; voltage multiplier cells; diode rectifiers

Subjects: Control of electric power systems; Inductors and transformers; Voltage control; Capacitors; DC-DC power convertors

References

    1. 1)
    2. 2)
    3. 3)
    4. 4)
      • 30. Nouri, T., Hosseini, S.H., Babaei, E.: ‘Analysis of voltage and current stresses of a generalized step-up DC-DC converter’. Has been accepted for publication in IET Power Electron.
    5. 5)
      • 31. Kazimierczuk, M.K.: ‘Pulse-width modulated DC-DC power converters’. Wright State University, Dayton, Ohio, USA, A John Wiley and Sons Publication, 2008.
    6. 6)
    7. 7)
      • 15. Axelrod, B., Berkovich, Y., Ioinovici, A.: ‘Hybrid switched-capacitor Cuk/Zeta/SEPIC converters in step-up mode’. Proc. IEEE Int. Symp. Circuits Syst., 2005, pp. 13101313.
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
      • 21. Berkovich, Y., Alexord, B., Shenkman, A.: ‘A novel diode-capacitor voltage multiplier for increasing the voltage of photovoltaic cells’. Proc. IEEE COMPEL, Zurich, August 2008.
    16. 16)
    17. 17)
      • 32. Department of Defense: ‘Reliability prediction of electronic equipment’. MIL-HDBK-217F, 1990.
    18. 18)
    19. 19)
    20. 20)
    21. 21)
    22. 22)
    23. 23)
      • 19. Ismail, E.H., Al-Saffar, M.A., Sabzali, A.J.: ‘High voltage gain single-switch non-isolated DC-DC converters for renewable energy applications’ (IEEE ICSET, Kandy, 2010).
    24. 24)
    25. 25)
    26. 26)
    27. 27)
    28. 28)
      • 33. McLyman, C.W.T.: ‘Transformer and inductor design handbook’ (Marcel Dekker, New York, 2004, 3rd edn. Revised and Expanded).
    29. 29)
    30. 30)
    31. 31)
      • 6. Da Camara, R.A., Cruz, C.M.T., Torrico-Bascope, R.P.: ‘Boost based on three-state switching cell for UPS applications’. Proc. Brazilian Power Electron. Conf., 2009, pp. 313318.
    32. 32)
    33. 33)
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