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High-step-up quadratic DC-DC converter based on switched capacitor and coupled inductor techniques
Kamran Karimi1, Vafa Marzang2, Mehran Karimi3
1Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, 51666-16471, Iran. k.karimi99@ms.tabrizu.ac.ir.
This study introduces a novel non-isolated quadratic high-step-up DC-DC converter. It achieves high voltage gain with reduced losses using coupled inductors and soft switching, verified by a prototype.
Area of Science:
- Electrical Engineering
- Power Electronics
Background:
- High step-up DC-DC converters are crucial for renewable energy integration.
- Existing topologies often suffer from high component stress and losses.
Purpose of the Study:
- To propose a novel non-isolated quadratic high-step-up DC-DC converter.
- To enhance voltage gain and reduce switching losses.
Main Methods:
- Implementation of a coupled inductor and a switched capacitor cell.
- Utilizing a resonant tank for diode loss reduction.
- Employing soft switching for diodes and MOSFETs.
- Incorporating a diode-capacitor clamp circuit.
Main Results:
- Achieved high voltage gain with a reduced component count.
- Minimized reverse recovery and switching losses.
- Demonstrated effective leakage inductance energy recovery.
- Validated performance through continuous and discontinuous conduction mode analysis.
Conclusions:
- The proposed converter offers a high voltage gain and efficiency.
- It presents lower voltage/current stress compared to related topologies.
- Experimental validation confirms the design's effectiveness.
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