Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Implementation of a ZVS Three-Level Converter with Series-Connected Transformers

  • Lin, Bor-Ren (Dept. of Electrical Eng., National Yunlin University of Science and Technology)
  • Received : 2012.09.21
  • Published : 2013.03.20
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Abstract

This paper studies a soft switching DC/DC converter to achieve zero voltage switching (ZVS) for all switches under a wide range of load condition and input voltage. Two three-level PWM circuits with the same power switches are adopted to reduce the voltage stress of MOSFETs at $V_{in}/2$ and achieve load current sharing. Thus, the current stress and power rating of power semiconductors at the secondary side are reduced. The series-connected transformers are adopted in each three-level circuit. Each transformer can be operated as an inductor to smooth the output current or a transformer to achieve the electric isolation and power transfer from the input side to the output side. Therefore, no output inductor is needed at the secondary side. Two center-tapped rectifiers connected in parallel are used at the secondary side to achieve load current sharing. Due to the resonant behavior by the resonant inductance and resonant capacitance at the transition interval, all switches are turned on at ZVS. Experiments based on a 1kW prototype are provided to verify the performance of proposed converter.

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References

  1. H. Akagi and R. Kitada, "Control and Design of a Modular Multilevel Cascade BTB System Using Bidirectional Isolated DC/DC Converters," IEEE Trans. Power Electron., Vol. 26, No. 9, pp. 2457-2464, Sep. 2011. https://doi.org/10.1109/TPEL.2011.2107752
  2. J. Rodriguez, J.-S. Lai, and F. Z. Peng, "Multilevel inverters: a survey of topologies, controls, and applications," IEEE Trans. Ind. Electron., Vol. 49, No. 4, pp. 724-738, Aug. 2002. https://doi.org/10.1109/TIE.2002.801052
  3. M. Malinowski, K. Gopakumar, J. Rodriguez, and M. A. Pérez, "A survey on cascaded multilevel inverters," IEEE Trans. Ind. Electron., Vol. 57, No. 7, pp. 2197-2206, Jul. 2010. https://doi.org/10.1109/TIE.2009.2030767
  4. B. R. Lin and C. L. Huang, "Analysis and implementation of a novel soft-switching pulse-width modulation converter," IET Proc.-Power Electronics, Vol. 2, No. 1, pp. 90-101, 2009. https://doi.org/10.1049/iet-pel:20070041
  5. S. S. Lee, S. W. Choi, and G. W. Moon, "High-efficiency active-clamp forward converter with transient current build-up (TCB) ZVS technique," IEEE Trans. Ind. Electron., Vol. 54, No. 1, pp. 310-318, Feb. 2007. https://doi.org/10.1109/TIE.2006.885127
  6. Q. M. Li and F. C. Lee, "Design consideration of the active-clamp forward converter with current mode control during large-signal transient," IEEE Trans. Power Electron., Vol. 18, No. 4, pp. 958-965, Jul. 2003. https://doi.org/10.1109/TPEL.2003.813760
  7. B. Choi, W. Lim, S. Bang, and S. Choi, "Small-signal analysis and control design of asymmetrical half-bridge DC-DC converters," IEEE Trans. Ind. Electron., Vol. 53, No. 2, pp. 511-520, Apr. 2006. https://doi.org/10.1109/TIE.2006.870715
  8. K. H. Yi and G. W. Moon, "Novel two-phase interleaved LLC series-resonant converter using a phase of the resonant capacitor," IEEE Trans. Ind. Electron., Vol. 56, No. 5, pp. 1815-1819, May 2009. https://doi.org/10.1109/TIE.2008.2011310
  9. D. Fu, Y. Liu, F. C. Lee, and M. Xu, "A novel driving scheme for synchronous rectifiers in LLC resonant converters," IEEE Trans. Power Electron., Vol. 24, No. 5, pp. 1321-1329, May 2009. https://doi.org/10.1109/TPEL.2009.2012500
  10. J. Yungtack, M. M. Jovanovic, and Y. M. Chang, "A new ZVS-PWM full-bridge converter," IEEE Trans. Power Electron., Vol. 18, No. 5, pp. 1122-1129, Sep. 2003. https://doi.org/10.1109/TPEL.2003.816189
  11. Y, Jiang, Z. Chen, and J. Pan, "Zero-voltage switching phase shift full-bridge step-up converter with integrated magnetic structure," IET Proc.-Power Electron., Vol. 3, No. 5, pp. 732-739, 2010. https://doi.org/10.1049/iet-pel.2009.0217
  12. J. P. Rodrigues, S. A. Mussa, I. Barbi, and A. J. Perin, "Three-level zero-voltage switching pulse-width modulation DC-DC boost converter with active clamping," IET Proc.- Power Electron., Vol. 3, No. 3, pp. 345-354, 2010. https://doi.org/10.1049/iet-pel.2008.0352
  13. X. Ruan, D. Xu, L. Zhou, B. Li, and Q. Chen, "Zero-voltage-switching PWM three-level converter with two clamping diodes," IEEE Trans. Ind. Electron., Vol. 49, No. 4, pp. 790-799, Aug. 2002. https://doi.org/10.1109/TIE.2002.801053
  14. J. R. Pinheiro and I. Barbi, "The three-level ZVS-PWM DC-to-DC converter," IEEE Trans. Power Electron., Vol. 8, No. 4, pp. 486-492, Oct. 1993. https://doi.org/10.1109/63.261019
  15. F. Canales, P. Barbosa, and F. C. Lee, "A zero-voltage and zero-current switching three-level DC/DC converter," IEEE Trans. Power Electron., Vol. 17, No. 6, pp. 898-904, Nov. 2002. https://doi.org/10.1109/TPEL.2002.805609
  16. W. Chen and X. Ruan, "Zero-voltage-switching PWM hybrid full-bridge three-level converter with secondary-voltage clamping scheme," IEEE Trans. Ind. Electron., Vol. 55, No. 2, pp. 644-654, Feb. 2008. https://doi.org/10.1109/TIE.2007.907676
  17. Y. Kang, B. Choi, and W. Lim, "Analysis and design of a forward-flyback converter employing two transformers," in proc. IEEE PESC, 2001, pp. 357-362.
  18. J. H. Mulkern, C. P. Henze, and D. S. Lo, "A high-reliablity, low-cost, interleaved bridge converter," IEEE Trans. Electron. Devices, Vol. 38, No. 2, pp. 777-783, Apr. 1991. https://doi.org/10.1109/16.75205

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