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Buck-Boost DC-AC converter based on coupled inductors.

Dina S M Osheba¹, Belal M Goda², Awad E Elsabbe²

¹Department of Electrical Engineering, Faculty of Engineering, Menoufia University, Shebin El-Kom, 32511, Egypt. DINA.asheba@sh-eng.menofia.edu.eg.

Scientific Reports

|July 30, 2024

Summary

A novel single-stage buck-boost DC-AC converter using coupled inductors offers high voltage gain for renewable energy and electric vehicle applications. This efficient design reduces component count, cost, and size while improving converter efficiency.

Keywords:

Coupled inductor DC–AC converter High voltage gain Single stage conversion system

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Area of Science:

Electrical Engineering
Power Electronics
Renewable Energy Systems

Background:

DC-AC conversion is crucial for integrating renewable energy sources and powering electric vehicles.
Traditional converters often face challenges with efficiency, size, and cost for high-gain applications.

Purpose of the Study:

To introduce a single-stage buck-boost DC-AC converter utilizing coupled inductors.
To demonstrate its suitability for renewable energy and electric vehicle applications.
To achieve high voltage gain with a reduced component count.

Main Methods:

A novel converter topology employing three semiconductor switches, two diodes, and three coupled inductors.
Sinusoidal Pulse Width Modulation (SPWM) for controlling the main switch.
Validation through MATLAB/SIMULINK simulations and experimental setup.

Main Results:

Achieved a high voltage gain of up to five times the input voltage.
Demonstrated a compact size and reduced component count compared to conventional designs.
Showcased improved converter efficiency and reduced switching losses.
Exhibited good agreement between simulated and experimental results.

Conclusions:

The proposed coupled-inductor-based buck-boost DC-AC converter is a viable solution for high-gain applications.
The topology offers significant advantages in terms of size, cost, and efficiency.
Experimental validation confirms the reliability and performance of the proposed converter design.