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High Step-Up Soft-Switched Converters Using Voltage Multiplier Cells

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3 Author(s)
Sanghyuk Lee ; Dept. of Electr. & Inf. Eng., Seoul Nat. Univ. of Sci. & Technol., Seoul, South Korea ; Pyosoo Kim ; Sewan Choi

In this paper, a soft-switched dc-dc converter using voltage multiplier cells is proposed for high-step up application. The proposed converter has the following advantages: 1) doubled voltage conversion ratio of the basic configuration (N = 1) compared to the conventional boost converter; 2) zero voltage switching turn ON of switches and zero current switching turn OFF of diodes; 3) low input current ripple, reduced size of the passive component and current stresses of switches due to interleaved structure, and 4) increased flexibility in device selection by adjusting the number of voltage multiplier cells. The proposed converter is compared to some high step-up converters. Experimental results from a 1-kW prototype are provided to validate the proposed concept.

Published in:

Power Electronics, IEEE Transactions on  (Volume:28 ,  Issue: 7 )