DC-to-DC converter with low input current ripple for maximum photovoltaic power extraction

Ahmad H. El Khateb, Nasrudin Abd Rahim, Jeyraj Selvaraj, Barry W. Williams

Research output: Contribution to journalArticlepeer-review

108 Citations (Scopus)
126 Downloads (Pure)


This paper presents a dc-to-dc converter, which offers continuous input and output energy flow, and low input current ripple, applicable and mandatory for photovoltaic arrays, and maximum power point tracking applications. The PV array yields exponential curves for current and voltage where the maximum power occurs at the curve's mutual knee. Conventional dc-to-dc converters have a relatively high input ripple current which causes high power losses when connected to nonlinear sources like PV arrays. The proposed converter operates with low input current ripple which maximizes the power that can be sourced from the PV array, without the need of any electrolytic filtering capacitance. The effect of the ripple current on the PV array can be significant, and decreases the efficiency of the PV system. The proposed converter employs series input inductance with both input and output continuous energy flow. Converter simulations and experimental results support and extol the system concept.
Original languageEnglish
Pages (from-to)2246-2256
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Issue number4
Early online date18 Dec 2014
Publication statusPublished - 1 Apr 2015


  • constant current converters
  • dc-to-dc converters
  • dc-to-dc-power conversion
  • photovoltaic cells
  • switched mode power supplies


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