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Energies 2012, 5(12), 5150-5170; doi:10.3390/en5125150
Article

A High Step-Down Interleaved Buck Converter with Active-Clamp Circuits for Wind Turbines

1
 and
2,*
Received: 30 August 2012 / Revised: 17 November 2012 / Accepted: 26 November 2012 / Published: 6 December 2012
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Abstract

In this paper, a high step-down interleaved buck coupled-inductor converter (IBCC) with active-clamp circuits for wind energy conversion has been studied. In high step-down voltage applications, an IBCC can extend duty ratio and reduce voltage stresses on active switches. In order to reduce switching losses of active switches to improve conversion efficiency, a IBCC with soft-switching techniques is usually required. Compared with passive-clamp circuits, the IBCC with active-clamp circuits have lower switching losses and minimum ringing voltage of the active switches. Thus, the proposed IBCC with active-clamp circuits for wind energy conversion can significantly increase conversion efficiency. Finally, a 240 W prototype of the proposed IBCC with active-clamp circuits was built and implemented. Experimental results have shown that efficiency can reach as high as 91%. The proposed IBCC with active-clamp circuits is presented in high step-down voltage applications to verify the performance and the feasibility for energy conversion of wind turbines.
Keywords: high-step; coupled-inductor; passive-clamp; active-clamp; soft-switching high-step; coupled-inductor; passive-clamp; active-clamp; soft-switching
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Tsai, C.-T.; Shen, C.-L. A High Step-Down Interleaved Buck Converter with Active-Clamp Circuits for Wind Turbines. Energies 2012, 5, 5150-5170.

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