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A High-Gain Quadratic DC–DC Converter With Trans-Inverse Property and Low Current Stress
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DOI：10.1109/tpel.2026.3696869.png)
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Abstract
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This study proposes a quadratic DC–DC converter that integrates a three-winding coupled inductor (TWCI) with voltage multiplier cells to achieve an ultra-high voltage gain. The topology maintains continuous input current and a common ground while minimizing voltage and current stress across the components. This stress reduction enhances overall performance and enables the use of lower-rated, more cost-effective semiconductors. Notably, the secondary winding of the TWCI operates in a real trans-inverse manner, enabling the topology to achieve higher voltage gains at a low turns ratio. Furthermore, regenerative passive clamp circuits are employed to recover the TWCI's leakage energy and limit the voltage stresses on the active switches, which operate with simultaneous switching patterns. The vertical structure serves to minimize semiconductor voltage stress. In addition, inherent current sharing between the TWCI and the input inductor significantly reduces conduction losses in the power components. Switching losses during the turnoff of both active switches are also minimized by a quasi-resonant cell. The paper supports this design with a comprehensive steady-state analysis, a comparative study, and key design guidelines. These theoretical contributions are conclusively validated by a 200-W hardware prototype, which demonstrates conversion from a 20-V input to a 400-V output.
Keywords:
Current sharing
quadratic
step-up DC–DC converter
trans-inverse
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6.5
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1.7W
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8.3W
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Cited Papers