access icon free Novel high gain DC–DC converter based on coupled inductor and diode capacitor techniques with leakage inductance effects

© The Institution of Engineering and Technology
Received 24/01/2020, Accepted 07/05/2020, Revised 13/04/2020, Published 13/05/2020

In this study, due to the low output voltage that often is presented by renewable energy sources like photovoltaic panels, a single switch high step-up dc–dc converter with high efficiency is proposed. The presented step-up dc–dc converter uses a coupled inductor and diode-capacitor technique to achieve high voltage gain. By changing the turns ratio of the coupled inductor, this novel topology does not need to operate at a high duty cycle conditions to obtain the high voltage gain. Moreover, the leakage inductance energy of the coupled inductor is recovered by using two passive clamp circuits to reduce the stress across the semiconductor devices, which improve efficiency. The operating modes of the proposed converter and the theoretical analysis are considered and finally, a prototype setup has been implemented to accredit the accuracy of the theoretical and simulation analysis.

Inspec keywords: DC-DC power convertors; inductors; renewable energy sources; capacitors

Other keywords: high voltage gain; high duty cycle conditions; leakage inductance energy; renewable energy sources; leakage inductance effects; presented step-up dc–dc converter; diode capacitor techniques; diode-capacitor technique; coupled inductor; low output voltage; single switch high step-up dc–dc converter; novel high gain DC–DC converter

Subjects: Power convertors and power supplies to apparatus; Power electronics, supply and supervisory circuits; Capacitors; DC-DC power convertors

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