A Non-Isolated Hybrid Zeta Converter with a High Voltage Gain and Reduced Size of Components

Padala Lakshmi Santosh Kumar Reddy,Mohammed S Alzaidi,Srinivas Singirikonda,Yeddula Pedda Obulesu,Sherif S M Ghoneim,Mosleh Al Harthi

doi:10.3390/electronics11030483

Padala Lakshmi Santosh Kumar Reddy, Mohammed S Alzaidi + Show 4 more

Open Access

https://doi.org/10.3390/electronics11030483

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Abstract

In this paper a novel non-coupled inductor-based hybrid Zeta converter with a minimal duty cycle is proposed. The converter’s potential benefits include buck and boost operation modes, easy implementation, continuous input current, and high efficiency. The converter provides a higher voltage gain than a conventional Zeta converter and is adapted to EV and LED applications due to the continuous input current. The proposed converter operates in three distinct operation modes via two electronic switches, each operated independently with a different duty ratio. This paper also analyzes the converter’s performance based on equivalent circuits, and analytical waveforms in each operating mode and design procedure are shown. The voltage gain and dynamic modelling are computed for both buck and boost operational modes for the hybrid Zeta converter. The efficiency and performance of the converter in both operating modes are validated using MATLAB/Simulink. Hardware in the loop (HIL) testing method on RT-LAB OP-5700 for both operation modes of the converter are performed. The peak efficiency of the proposed converter with an input voltage of 36 V is obtained at 95.2%. The proposed converter offers a wide voltage gain at a small duty cycle with fewer components and high efficiency. Simulations and experiments have been carried out under different conditions and the results proved that the proposed converter is a viable solution.

Highlights

Renewable energy sources are increasing in prominence as non-renewable sources become limited
Most power converter researchers have been interested in converter topologies with limited components that attain large voltage gain with minimal duty cycles, and several non-isolated DC-DC converter topologies have been proposed over the years
This paper introduced a hybrid non-isolated DC-DC Zeta converter with higher voltage gain and fewer components

Summary

Introduction

Renewable energy sources are increasing in prominence as non-renewable sources become limited. The output voltage level of renewables such as solar, wind, and hydrogen fuel is very low; to solve this issue, a different types of power converters (buck, boost and buck-boost) have been addressed in many research studies. Power converters with voltage boost or buck operations based on the load ratings are essential in renewable energy systems [1,2,3]. These converters regulate the output voltage more than a wide range of input voltages. Most power converter researchers have been interested in converter topologies with limited components that attain large voltage gain with minimal duty cycles, and several non-isolated DC-DC converter topologies have been proposed over the years. Due to the simplicity of the design of these converters, the current and voltage stresses on the elements are significantly high, and the voltage gain is restricted in buck mode

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