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

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 conve...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2008-01, Vol.55 (1), p.154-162
Main Authors: Wu, Tsai-Fu, Lai, Yu-Sheng, Hung, Jin-Chyuan, Chen, Yaow-Ming
Format: Article
Language:English
Subjects:
Active clamp
Active inductors
boost converter
Clamps
coupled inductors
Coupling circuits
Prototypes
Stress
Surges
Switches
Switching converters
Switching loss
Zero voltage switching
zero-voltage switching (ZVS)
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Summary: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.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2007.903925