Full-Range Soft-Switching Buck-Boost with PI

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Full-Range Soft-Switching Buck-Boost with PI

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 To increase the conversion efficiency of using integrated interleaved boost converter and also the phase shifted is control.


 A new method for deriving isolated Buck-Boost (IBB) converter with single-stage power conversion is proposed in this paper, and novel IBB converters based on high-frequency bridgeless interleaved Boost rectifiers are presented. The semiconductors, conduction losses and switching losses are reduced significantly by integrating the interleaved Boost converters into the full-bridge diode-rectifier. Various high-frequency bridgeless Boost rectifiers are harvested

Based on different types of interleaved Boost converters, including conventional Boost converter and high step-up Boost converters with voltage multiplier and coupled inductor. The full-bridge IBB converter with voltage multiplier.


 The non-isolated Buck cell in the non-isolated two-switch Buck-Boost converter with an isolated Buck cell, the structure of the IBB converters presented. Although wide voltage gain range with flexible control can be achieved, it should be noted that the conversion efficiency will be hurt by the cascaded two-stage conversion architecture due to the additional conduction and switching losses.


 Based on the proposed bridgeless Boost rectifiers, novel IBB converters can be derived by employing the input stage of an isolated Buck converter as the primary-side circuit of

the IBB converters. The primary-side circuit can be full-bridge, half-bridge or three-level half-bridge, etc., as shown. Since the focus of this paper is the boost rectifiers, only the IBB converter topologies with full-bridge input stage are shown. Obviously, the input stage of the IBB converter is a Buck-cell, the output stage is a bridgeless Boost cell, and the two cells are linked by a high-frequency inductor and transformer. This structure is similar to the non-isolated two-switch Buck-Boost converter with pi control.



  • PIC Controller
  • Driver Board


  • Matlab/ simulink


  • The voltage stresses of the semiconductor in the boost-rectifier are reduced significantly due to the voltage multiplier. Hence low voltage rated devices with better conduction and switching performance can be used to improve efficiency.
  • Soft switching within the whole operating range have been achieved for all of the active switched and diodes respectively by adopting the optimized phase shift control.



[1] G. Di Capua, S.A. Shirasavar, M.A. Hallworth, N. Femia, “An enhanced model for small-signal analysis of the phase-shifted full-bridge converter,” IEEE Trans. Power Electronics, vol. 30, no. 3, pp. 1567-1576, Mar. 2015.

[2] Z. Guo, D. Sha, X. Liao, “Input-series-output-parallel phase-shift full-bridge derived DC-DC converters with auxiliary LC networks to achieve wide zero-voltage switching range,” IEEE Trans. Power Electronics, vol. 29, no. 10, pp. 508-513, Oct. 2014.

[3] H. Wu, Y. Xing, “Families of forward converters suitable for wide input voltage range applications,” IEEE Trans. Power Electronics, vol. 29, no. 11, pp. 6006-6017, Nov. 2014.

[4] Y. Wang, W. Liu, H. Ma, L. Chen, “Resonance analysis and soft-switching design of isolated boost converter with coupled inductors for vehicle inverter application,” IEEE Trans. Power Electronics, vol. 30, no. 3, pp. 1383-1392, Mar. 2015.

[5] F. Evran, M.T. Aydemir, “Isolated High Step-Up DC-DC Converter with Low Voltage Stress,” IEEE Trans. Power Electronics, vol. 29, no. 7, pp.

3591-3603, July. 2014.






Additional information

Weight1.000000 kg


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