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Transactions: WSEAS TRANSACTIONS ON CIRCUITS AND SYSTEMS
Transactions ID Number: 52-306
Full Name: Chih-Lung Shen
Position: Professor
Age: ON
Sex: Male
Address: 1 University Road, Yuanchau, Kaohsiung 824
Country: TAIWAN
Tel: +886-7-6011000 ext. 2515
Tel prefix:
Fax:
E-mail address: clshen@ccms.nkfust.edu.tw
Other E-mails: clshen2515@gmail.com
Title of the Paper: Interleaved Soft-Switching Buck Converter with Coupled Inductors
Authors as they appear in the Paper: Chih-Lung Shen, Cheng-Tao Tsai
Email addresses of all the authors: clshen@ccms.nkfust.edu.tw, cttsai@ncut.edu.tw
Number of paper pages: 11
Abstract: This paper presents an interleaved soft-switching buck converter with coupled inductors to extend duty ratio for high step-down voltage applications. In the proposed converter, a single-capacitor turn-off snubber is introduced to limit voltage rising rate of active switches to reduce turn-off loss. To handle the energy trapped in the leakage inductance of the coupled inductors, simple passive-clamp circuits are added to the proposed converter, which can effectively recycle the energy and suppress voltage spike. To highlight the merits of the proposed converter, its performance indexes, such as voltage gain function and component stresses, are analyzed and compared with those of the conventional interleaved buck converter. In this study, a prototype of the proposed converter, of which input voltage range is 127-177 Vdc, output voltage is 12 Vdc, and power capacity rates at 240 W, has been designed and implemented to verify the feasibility. From experimental results,!
it has been shown that conversion efficiency up to 85% can be achieved at full load condition.
Keywords: Interleaved, Soft-switching, Coupled inductors, Leakage inductance, Passive-clamp circuits
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