PWM Control of a High Gain n-Phase Interleaved Current Fed Topology

Sonam Acharya, Ayan Mallik, Santanu K. Mishra

Research output: Contribution to journalArticlepeer-review


Non-isolated high-gain DC-DC converters are essential for applications with low input voltage such as, solar PV modules, fuel- cells, etc. Due to the high step-up conversion ratio, the input current increases significantly with increase in power rating. This leads to considerable conduction loss in the non-ideal elements of the converter, degrading the efficiency. Moreover, peak-to-peak ripple of the input current also increases with an increase in power rating. This increases the size of the passive elements, thereby limiting the power density. An n-phase Interleaved Complementary Current Fed Topology (n-phase ICCFT) is proposed in this paper to address the aforementioned limitations. Two PWM schemes are proposed to implement the interleaving of the n-phases. Detailed steady-state analysis with various operating modes and the gain characteristics of the proposed converter are analyzed in the paper. A comparative analysis of the two PWM schemes in terms of ripple characteristics, capacitor current stress and power loss is reported. Operation of a two-phase ICCFT with the proposed PWM schemes is verified using PLECS simulation and experiments using a proof of concept hardware.

Original languageEnglish (US)
JournalIEEE Transactions on Industrial Electronics
StateAccepted/In press - 2021
Externally publishedYes


  • Capacitors
  • DC-DC
  • DC-DC power converters
  • High gain
  • Inductors
  • Interleaving
  • Manganese
  • Pulse width modulation
  • Steady-state
  • Topology

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering


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