A Noval Interleaved Buck Converter With High Step-Down Conversion Ratio
AbstractIn this paper, a novel transformerless interleaved high step-down conversion ratio dc–dc converter with low switch voltage stress is proposed. In this converter, two input capacitors are series-charged by the input voltage and parallel discharged by a new two-phase interleaved buck converter. Based on the capacitive voltage division, the main objective of the voltage-divider circuit in the converter is storing energy in the blocking capacitors for increasing the step-down conversion ratio. Voltage stress of active switches is also reduced. As a result, the proposed converter topology possesses the low switch voltage stress characteristic. This will allow one to choose lower voltage rating MOSFETs to reduce both switching and conduction losses. The overall efficiency is also consequently improved. To verify the performance of this topology, simulations are done using MATLAB or SIMULINK.
. J. P. Rodrigues, S. A. Mussa, M. L. Heldwein, and A. J. Perin, “Three level ZVS active clamping PWM for the dc–dc buck converter,” IEEE Trans. Power Electron., vol. 24, no. 10, pp. 2249–2258, Oct. 2009.
. X. Ruan, B. Li, Q. Chen, S. C. Tan, and C. K. Tse, “Fundamental considerations of three-level dc–dc converters: Topologies,
analysis, control,” IEEE Trans. Circuit Syst., vol. 55, no. 11, pp. 3733–3743, Dec. 2008.
. ] Y. M. Chen, S. Y. Teseng, C. T. Tsai, and T. F. Wu, “Interleaved buck converters with a single-capacitor turn-off snubber,” IEEE Trans. Aerosp. Electron. Syst., vol. 40, no. 3, pp. 954–967, Jul. 2004
. C. T. Tsai and C. L. Shen, “Interleaved soft-switching coupled- buck converter with active-clamp circuits,” in Proc. IEEE Int. Conf. Power Electron. Drive Syst., 2009, pp. 1113–1118.
. I.-O. Lee, S.-Y. Cho, and G.-W. Moon, “Interleaved buck converter having low switching losses and improved step-down conversion ratio,” IEEE Trans. Power Electron., vol. 27, no. 8, pp. 3664–3675, Aug. 2012.
. P. Xu, J. Wei, and F. C. Lee, “Multiphase coupled-buck converter—A novel high efﬁcient 12 V voltage regulator module,” IEEE Trans. Power Electron., vol. 18, no. 1, pp. 74–82, Jan. 2003.
This work is licensed under a Creative Commons Attribution 4.0 International License.