Operation and Design Consideration of an Ultra High Step-Up DC-DC Converter featuring High Power Density

Hadi Tarzamni, Mehran Sabahi, Saeed Rahimpour, Matti Lehtonen, Payman Dehghanian

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)
125 Downloads (Pure)


A new dual-coupled inductor (CI) single-switch high step-up dc-dc topology featuring high power density is proposed in this study. Various capacitive power transfer methods, as well as inductive power transfer techniques, are utilized to act as a more efficient power interface between the input and the load. Three ports in the output terminal are employed to distribute the overall output voltage, diminish the voltage ripple in high-voltage gain ratios, and decrease the voltage stress on the port component. In the proposed converter, first, the voltage gain is high in lower duty cycles of the switching. Second, the stored energy of magnetizing and leakage inductances is recycled in both Cls. Third, the switch voltage spikes are alleviated. Fourth, the operation is done with no circulating current. Fifth, low-size passive components are presented. Sixth, high power density is obtained, and the voltage range is widened. Finally, a simple pulsewidth modulation (PWM) utilizing a wide control range is provided. In this study, the steady-state operation is analyzed under both continuous conduction mode (CCM) and discontinuous conduction mode (DCM), and the performance of the converter is evaluated using comparisons with similar works. In addition, the experimental results have been provided to justify the feasibility of the design.

Original languageEnglish
Pages (from-to)6113-6123
Number of pages11
Issue number5
Early online date13 Apr 2021
Publication statusPublished - 1 Oct 2021
MoE publication typeA1 Journal article-refereed


  • Capacitors
  • coupled inductor
  • DC-DC power conversion
  • DC-DC power converters
  • high power density
  • high step-up converter
  • High-voltage techniques
  • Inductance
  • Inductors
  • Stress
  • Switches


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