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An enhanced gain non-isolated quadratic boost DC-DC converter with continuous source current
Nafis Subhani1, Zazilah May2, Md Khorshed Alam3
1Department of Electrical and Electronic Engineering, Leading University, Sylhet, Bangladesh.
Plos One
|December 7, 2023
Summary
A novel non-isolated quadratic boost DC-DC converter offers high voltage gain with fewer components. Its continuous input current and shared switch ground simplify design for photovoltaic applications.
Area of Science:
- Electrical Engineering
- Power Electronics
Background:
- DC-DC converters are crucial for power management.
- Existing converters may have limitations in voltage gain, component count, or suitability for renewable energy sources.
Purpose of the Study:
- To propose a novel non-isolated quadratic boost DC-DC converter topology.
- To achieve high output voltage gain with reduced component count.
- To enhance suitability for photovoltaic (PV) applications.
Main Methods:
- Detailed mathematical modeling and steady-state analysis.
- Component voltage stress and power loss calculations.
- Simulation using Matlab/Simulink and experimental validation of a 250 W prototype.
Main Results:
- The proposed converter achieves high output voltage gain with a lower component count.
- Continuous input current simplifies input filter design, ideal for PV systems.
- Peak efficiency of 92% achieved at a 50% duty cycle, validating the design.
Conclusions:
- The non-isolated quadratic boost converter is an efficient and simplified solution for PV power systems.
- The design offers advantages in component count, input current characteristics, and control power supply requirements.
- Experimental results confirm the theoretical and simulation findings, demonstrating practical viability.
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