Isolated SEPIC DC-DC converter with ripple-free input current and lossless snubber

Sin Woo Lee; Hyun Lark Do

doi:10.1109/TIE.2017.2733440

Isolated SEPIC DC-DC converter with ripple-free input current and lossless snubber

Sin Woo Lee, Hyun Lark Do

Electronic Engineering Program

Seoul National University of Science and Technology (SNUST)

Research output: Contribution to journal › Article › peer-review

78 Scopus citations

Abstract

This paper proposes an isolated single-ended primary-inductor converter (SEPIC) dc-dc converter with ripple-free input current and lossless snubber. The proposed converter is based on a conventional isolated SEPIC converter to enable electrical isolation and high voltage gain using a coupled inductor. The input current ripple is significantly reduced by utilizing an auxiliary circuit that also functions as a lossless snubber circuit with an additional diode. Moreover, the maximum switch voltage stress is clamped to a low voltage by the snubber circuit. Therefore, a low voltage rating mosfet that has low R_D S (on₎ can be utilized as a main switch device. Hence, the total power efficiency is improved. Experimental results from a 100 W prototype, which are presented to verify the theoretic analysis and performance of the proposed converter.

Original language	English
Article number	2733440
Pages (from-to)	1254-1262
Number of pages	9
Journal	IEEE Transactions on Industrial Electronics
Volume	65
Issue number	2
DOIs	https://doi.org/10.1109/TIE.2017.2733440
State	Published - 29 Jul 2017

Keywords

Electrical isolation
Lossless snubber
Ripple-free current
Single-ended primary-inductor converter (SEPIC)

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10.1109/TIE.2017.2733440

Cite this

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title = "Isolated SEPIC DC-DC converter with ripple-free input current and lossless snubber",

abstract = "This paper proposes an isolated single-ended primary-inductor converter (SEPIC) dc-dc converter with ripple-free input current and lossless snubber. The proposed converter is based on a conventional isolated SEPIC converter to enable electrical isolation and high voltage gain using a coupled inductor. The input current ripple is significantly reduced by utilizing an auxiliary circuit that also functions as a lossless snubber circuit with an additional diode. Moreover, the maximum switch voltage stress is clamped to a low voltage by the snubber circuit. Therefore, a low voltage rating mosfet that has low RD S (on) can be utilized as a main switch device. Hence, the total power efficiency is improved. Experimental results from a 100 W prototype, which are presented to verify the theoretic analysis and performance of the proposed converter.",

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AB - This paper proposes an isolated single-ended primary-inductor converter (SEPIC) dc-dc converter with ripple-free input current and lossless snubber. The proposed converter is based on a conventional isolated SEPIC converter to enable electrical isolation and high voltage gain using a coupled inductor. The input current ripple is significantly reduced by utilizing an auxiliary circuit that also functions as a lossless snubber circuit with an additional diode. Moreover, the maximum switch voltage stress is clamped to a low voltage by the snubber circuit. Therefore, a low voltage rating mosfet that has low RD S (on) can be utilized as a main switch device. Hence, the total power efficiency is improved. Experimental results from a 100 W prototype, which are presented to verify the theoretic analysis and performance of the proposed converter.

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Isolated SEPIC DC-DC converter with ripple-free input current and lossless snubber

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