A High Gain Soft Switching Interleaved DC-DC Converter

Sirous TALEBI  Ehsan ADIB  Majid DELSHAD  

IEICE TRANSACTIONS on Electronics   Vol.E101-C   No.11   pp.906-915
Publication Date: 2018/11/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E101.C.906
Type of Manuscript: PAPER
Category: Electronic Circuits
high step-up,  photovoltaic (PV) system,  interleaved boost converter,  non-isolated,  zero voltage switching (ZVS),  

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This paper presents a high step-up DC-DC converter for low voltage sources such as solar cells, fuel cells and battery banks. A novel non isolated Zero-Voltage Switching (ZVS) interleaved DC-DC boost converter condition is introduced. In this converter, by using coupled inductor and active clamp circuit, the stored energy in leakage inductor is recycled. Furthermore, ZVS turn on condition for both main and clamp switches are provided. The active clamp circuit suppresses voltage spikes across the main switch and the voltage of clamp capacitor leads to higher voltage gain. In the proposed converter, by applying interleaved technique, input current ripple and also conduction losses are decreased. Also, with simple and effective method without applying any additional element, the input ripple due to couple inductors and active clamp circuit is cancelled to achieve a smooth low ripple input current. In addition, the applied technique in this paper leads to increasing the life cycle of circuit components which makes the proposed converter suitable for high power applications. Finally an experimental prototype of the presented converter with 40 V input voltage, 400 V output voltage and 200 W output power is implemented which verifies the theoretical analysis.