Portal de Periódicos da CAPES

Boost Converter With Coupled Inductors and Buck–Boost Type of Active Clamp

2008; Institute of Electrical and Electronics Engineers; Volume: 55; Issue: 1 Linguagem: Inglês

10.1109/tie.2007.903925

1557-9948

Tsai‐Fu Wu, Yu‐Sheng Lai, J.-C. Hung, Yaow-Ming Chen,

Advancements in Battery Materials

This paper proposes a boost converter with coupled inductors and a buck-boost type of active clamp. In the converter, the active-clamp circuit is used to eliminate the voltage spike that is induced by the trapped energy in the leakage inductor of the coupled inductors. The active switch in the converter can still sustain a proper duty ratio even under high step-up applications, reducing voltage and current stresses significantly. Moreover, since both main and auxiliary switches can be turned on with zero-voltage switching, switching loss can be reduced, and conversion efficiency therefore can be improved significantly. A 200 W prototype of the proposed boost converter was built, from which experiment results have shown that efficiency can reach as high as 92% and surge can be suppressed effectively. It is relatively feasible for low-input-voltage applications, such as fuel cell and battery power conversion.