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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,*
1 Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan 2 Department of Electronic Engineering, National Kaohsiung First University of Science and Technology, Kaohsiung 824, Taiwan
* Author to whom correspondence should be addressed.
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 (CC BY 3.0).

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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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