A New soft switching technique for high step down DC-DC converter

  • majid delshad iau
  • mostafa fatehi
  • shokuh shabani
Keywords: Buck converter, High step down, ZVS, PWM

Abstract

A new high step down soft switching DC-DC converter is proposed in this paper. In the proposed converter, the voltage gain is lower than the conventional buck converter, and the soft switching condition under zero voltage switching is established. Due to this condition in addition to reducing switching losses, there is no reverse recovery problem in the proposed converter. Another feature of the proposed converter is use of a synchronous switch instead of a high-current output diode, which is reduced the conduction losses of the output diode. Control of the converter is done in the same way as the conventional buck converter as PWM, and the converter maintains its control simplicity. The operation of the proposed converter is described and its relationship is expressed. The design and selecting the value of elements in the proposed converter are presented. To verify the theoretical analysis, a 120 W prototype of the converter is made and tested and the experimental results are presented.

References

[1] Yong-Won Cho, Woo-Jun Cha, Jung-Min Kwon, Bong-Hwan Kwon, “Improved single-phase transformerless inverter with high power density and high efficiency for grid-connected photovoltaic systems, ” Renewable Power Generation IET, vol. 10, no. 2, pp. 166-174, 2016.
[2] Rong-Jong Wai, Jun-Jie Liaw, “High-efficiency step-down converter via coupled inductor,” Power Electronics and Motion Control Conference (IPEMC-ECCE Asia) 2016 IEEE 8th International, pp. 1184-1189, 2016.
[3] Pit-Leong Wong, Peng Xu, Yang, B., Lee, F.C., “Performance improvements of interleaving VRMs with coupling inductors,” Power Electronics, IEEE Transactions on, vol.16, no.4, pp.499, 507, Jul. 2001.
[4] Yang Qiu, Ming Xu, Yao, K., Juanjuan Sun, Lee, F.C., “Multifrequency small-signal model for buck and multiphase buck converters,” Power Electronics, IEEE Transactions on, vol.21, no.5, pp.1185, 1192, Sept. 2006.
[5] Jia Wei, Lee, F.C., “Two novel soft-switched, high frequency, high-efficiency, non-isolated Voltage Regulators-the phase-shift buck converter and the matrix-transformer phase-buck converter,” Power Electronics, IEEE Transactions on, vol.20, no.2, pp.292, 299, March 2005.
[6] Moo, C.S., Yu Jen Chen, Cheng, H.L., Yao Ching Hsieh, “Twin-Buck converter with zero-voltage transition,” Industrial Electronics, IEEE Transactions on, vol.58, no.6, pp.2366, 2371, June 2011.
[7] H. Do, “Zero-Voltage-Switching Synchronous Buck Converter with a Coupled Inductor,” IEEE Trans. Ind. Electron., vol. 58, no. 8, pp. 3440-3447, Aug. 2011.
[8] M. Esteki, E. Adib, H. Farzanehfard, and S. A. Arshadi “Auxiliary circuit for zero voltage transition interleaved PWM buck converter,” IET Power Electron., Aug. 2015.
[9] Ilic, M., Maksimovic, D., “Interleaved zero-current-transition buck converter,” Industry Applications, IEEE Transactions on, vol.43, no.6, pp.1619, 1627, Nov. 2007.
[10] J. Ammu Striney, V. Anuja, M. Belsam Jeba Ananth, “Design of integrated ZVS single-inductor synchronous buck converter for multiload applications,” Electrical Electronics and Optimization Techniques (ICEEOT) International Conference on, pp. 4835-4840, 2016.
[11] D. Maksimovic and S. Cuk, “Switching converters with wide DC conversion range,” in IEEE Transactions on Power Electronics, vol. 6, no. 1, pp. 151-157, Jan 1991.
[12] X. Ruan, B. Li, Q. Chen, S. C. Tan and C. K. Tse, “Fundamental Considerations of Three-Level DC–DC Converters: Topologies, Analyses, and Control,” in IEEE Transactions on Circuits and Systems I: Regular Papers, vol. 55, no. 11, pp. 3733-3743, Dec. 2008.
[13] Xinbo Ruan, Jian Wei and Yali Xue, “Three-level converters with the input and output sharing the ground,” Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual, 2003, pp. 1919-1923 vol.4.
[14] Jia Wei, Lee, F.C., “Two novel soft-switched, high frequency, high-efficiency, non-isolated Voltage Regulators-the phase-shift buck converter and the matrix-transformer phase-buck converter,” Power Electronics, IEEE Transactions on, vol.20, no.2, pp.292, 299, March 2005.
Published
2019-05-12
How to Cite
delshad, majid, fatehi, mostafa, & shabani, shokuh. (2019). A New soft switching technique for high step down DC-DC converter. Majlesi Journal of Energy Management, 6(3). Retrieved from http://journals.iaumajlesi.ac.ir/em/index/index.php/em/article/view/354
Section
Articles