access icon free High step-up passive absorption circuit used in non-isolated high step-up converter

To obtain a high step-up gain with high efficiency in distributed power sources application, such as photovoltaic (PV) and fuel cells, a passive absorption circuit with voltage step-up character is inserted in the interleaved flyback-forward converter for leakage energy recycle and voltage gain extension. By applying the high step-up passive-clamp circuit, the voltage spike on the metal-oxide semiconductor field-effect transistor is clamped and the energy stored inside the leakage inductance of the coupled inductor can be recycled to get high-output voltage. Moreover, it offers another design freedom to obtain higher voltage-conversion ratio. The operational principle and characteristics of the improved flyback-forward converter are presented, and verified experimentally with a 500 W prototype converter. The proposed high step-up passive-clamp can be widely used in high step-up DC–DC converter applications, and a new high step-up topology is deduced to illustrate the theoretical analysis.

Inspec keywords: coupled circuits; clamps; DC-DC power convertors; MOSFET; power supply quality; passive networks; inductors

Other keywords: clamping; voltage spike; step-up DC-DC converter application; fuel cell; energy storage; leakage energy recycle; voltage step-up character; metal-oxide semiconductor field-effect transistor; leakage inductance; interleaved flyback-forward converter; photovoltaic cell; nonisolated high step-up converter; PV cell; high step-up passive absorption circuit; voltage gain extension; voltage-conversion ratio; coupled inductor; distributed power source application; high step-up passive-clamp circuit; power 500 W

Subjects: Inductors and transformers; Power electronics, supply and supervisory circuits; Passive filters and other passive networks; Insulated gate field effect transistors

References

    1. 1)
    2. 2)
    3. 3)
      • 29. Hu, Y., Deng, Y., Long, J., Lu, X., He, X.: ‘A high step-up passive absorption circuit used in non-isolated high step-up converter’. IEEE APEC, 2013, pp. 19661971.
    4. 4)
    5. 5)
    6. 6)
      • 23. Wu, T.F., Lai, Y.S., Hung, J.C., Chen, Y.M.: ‘An improved boost converter with coupled inductors and buck–boost type of active clamp’. Conf. Rec. IEEE IAS Annual Meeting, 2005, pp. 639644.
    7. 7)
    8. 8)
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
    14. 14)
    15. 15)
    16. 16)
    17. 17)
    18. 18)
    19. 19)
    20. 20)
    21. 21)
    22. 22)
    23. 23)
    24. 24)
    25. 25)
    26. 26)
      • 24. Baek, J.W., Ryoo, M.H., Kim, T.J., Yoo, D.W., Kim, J.S.: ‘High boost converter using voltage multiplier’. Proc. IEEE IECON, 2005, pp. 567572.
    27. 27)
    28. 28)
    29. 29)
    30. 30)
      • 25. Dumrongkittigule, T., Tarateeraseth, V., Khan-ngern, W.: ‘A new integrated inductor with balanced switching technique for common mode EMI reduction in high step-up dc/dc converter’. Proc. EMC-Zurich, 2006, pp. 541544.
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