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

作者：Tsai Cheng Tao; Shen Chih Lung^*

来源：Energies, 2012, 5(12): 5150-5170.

DOI：10.3390/en5125150

• high-step
• coupled-inductor
• passive-clamp
• active-clamp
• soft-switching

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.

• 出版日期2012-12