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논문 기본 정보

자료유형
학술저널
저자정보
Ali Ariyan (Islamic Azad University) Mohammad Rouhollah Yazdani (Islamic Azad University)
저널정보
전력전자학회 JOURNAL OF POWER ELECTRONICS JOURNAL OF POWER ELECTRONICS Vol.17 No.6
발행연도
2017.11
수록면
1,445 - 1,453 (9page)

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초록· 키워드

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In this study, a new zero-voltage transition (ZVT) buck converter with coupled inductor using a synchronous rectifier and a lossless clamp circuit is proposed. The regular buck converter with tapped inductor has extended duty cycle for high step-down applications. However, the leakage inductance of the coupled inductor produced considerable voltage spikes across the switch. A lossless clamp circuit is used in the proposed converter to overcome this problem. The freewheeling diode was replaced with a synchronous rectifier to reduce conduction losses in the proposed converter. ZVT conditions at turn-on and turn-off instants were provided for the main switch. The synchronous rectifier switch turned on under zero-voltage switching, and the auxiliary switch turn-on and turn-off were under zero-current condition. Experimental results of a 100 W–100 kHz prototype are provided to justify the validity of the theoretical analysis. Moreover, the conducted electromagnetic interference of the proposed converter is measured and compared with its hard-switching counterpart.

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Abstract
Ⅰ. INTRODUCTION
Ⅱ. CIRCUIT DESCRIPTION AND OPERATION
Ⅲ. DESIGN CONSIDERATION
Ⅳ. EXPERIMENTAL WAVEFORMS AND EFFICIENCY
Ⅴ. CONDUCTED EMI MEASUREMENT
Ⅵ. COMPARISON WITH OTHER HIGH STEP-DOWN ZV CONVERTERS
Ⅶ. CONCLUSIONS
REFERENCES

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