High Step-up Transformerless DC/DC Converter with Low Input Current Ripple Suitable for Photovoltaic Applications

In this particle we proposed a high step-up and high efficiency transformerless dc-dc converter with a very small input current ripple. The capability of operation under wide input voltage range besides its small input current ripple makes it a promising candidate for photovoltaic applications. ZVS operation of the switch is insured. The operation principle and the steady-state analyses are discussed thoroughly. Firstly the basic structure is proposed then the final scheme is derived which have high gain in smaller duty cycles besides the ability to perform in wide input voltage range operation with lower stress on the switch. The simulation results for the proposed converter are given which validates the theoretical analysis and design

کلیدواژه ها:

ZVS operation ، current ripple ، high step-up ، transformerless converter ، switches stress