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A Novel Flexible, Low-Voltage-Stress Quadratic High Step-Up DC–DC Converter With Boost Function Scalability
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李
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DOI：10.1109/JESTPE.2025.3613509.png)
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Abstract
En 中文
This article describes a nonisolated high step-up dc–dc converter. This converter uses a quadratic structure, a coupled inductor (CI) combined with switched capacitor, voltage multiplier cells (VMCs), and only a single power switch. The proposed converter achieves a higher voltage gain at a lower turns ratio and lower duty cycle than conventional quadratic converters. The presence of a common ground between the input energy source and the load is more favorable for closed-loop control, making the converter suitable for renewable energy applications. Also, the proposed converter is characterized by low voltage stress on semiconductor components (switch/diode), more compactness with high efficiency. This article illustrates the principle of operation and steady-state analysis of the proposed converter, followed by discussions on the generalized induction method for voltage gain, theoretical efficiency analysis, and a performance comparison with other converters. Finally, a prototype with an input voltage of 17–48 V, an output voltage of 400 V and a rated output power of 100 W was made according to the design criteria, and the experiment verified the accuracy of the theory.
Keywords:
Coupled inductor (CI)
dc–dc converter
high step-up
nonisolated
quadratic
Journal
I
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4.9
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249
Citations:
0
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