A Transformerless Quadratic Buck-Boost Converter Suitable for Renewable Applications

Gholizadeh, Hossein; Sarikhani, Ali; Hamzeh, Mohsen

doi:10.1109/pedstc.2019.8697232

Cited by 36 publications

(117 citation statements)

References 17 publications

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“…Different structures of isolated Ćuk converters are presented in References [33,34]. The step-up and step-down nature can be also found in quadratic converters [20]. How it was mentioned, in this paper a new hybrid Ćuk-type topology with coupled inductors exhibiting a higher static conversion ratio than in a classical Ćuk converter is introduced.…”

Section: Description Of Operation and Steady State Analysis Of The Prmentioning

confidence: 99%

“…Because D 1 and D 2 currents are equal to i LM for these diodes the CCM condition is the same and imposes that the minimum magnetizing current, I LMmin to be positive. As, I LMmin = I LM − 1 2 •∆I LM , using (9) and (20), the final condition is:…”

Section: Semiconductor Stresses and Inductor Currents And Capacitor Vmentioning

confidence: 99%

“…Dc-dc converters are used in a large variety of applications: unidirectional and bidirectional chargers in automotive, renewable energies in photovoltaic cells for example, dc grids, cellphones, computers, laptops and so forth. These power circuits should be able to step-up [1][2][3][4][5][6][7][8][9], step-down [10][11][12][13] or step-up/step-down [14][15][16][17][18][19][20][21] the voltage from the input. The polarity of the output voltage can be the same [1][2][3][4][6][7][8] or reverse [5,[22][23][24][25][26][27][28][29] compared to that of the input voltage.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, depending on the application requirements, considering the few parameters mentioned before, different types of converters exist on the market. Because this paper introduces a newĆuk topology, different types of both step-down/step-up converters have been analyzed [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. If isolation is not necessary, the classical Buck-Boost converter [30] can be used.…”

Section: Introductionmentioning

confidence: 99%

“…Different structures of isolatedĆuk converters are presented in References [33,34]. The step-up and step-down nature can be also found in quadratic converters [20].…”

Section: Introductionmentioning

confidence: 99%

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A New Hybrid Ćuk DC-DC Converter with Coupled Inductors

2020

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This paper proposes a new hybrid Ćuk-type converter employing two inductors built on the same core which can be successfully used in applications requiring an output voltage considering higher than the input one. With few components added, in the proposed converter the static conversion ratio can be easily extended becoming wider compared to the classical Ćuk topology. At the same duty cycle range the output voltage is higher than in the classical Ćuk converter. The output voltage remains with negative polarity and with a reduced ripple. An advantage of the new converter is given by its two degrees of freedom. A DC and AC analysis is carried out, device stresses are evaluated and a comparative analysis of the proposed hybrid Ćuk topology to other indirect converters has also been performed. All the equations necessary for designing the converter are provided. The simulations performed together with the practical experiments carried out, all results confirm that the theoretical considerations are correct and validate the features that the proposed converter can provide a higher static conversion ratio without operating at high duty cycles.

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Section: Description Of Operation and Steady State Analysis Of The Prmentioning

confidence: 99%

Section: Semiconductor Stresses and Inductor Currents And Capacitor Vmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Different structures of isolatedĆuk converters are presented in References [33,34]. The step-up and step-down nature can be also found in quadratic converters [20].…”

Section: Introductionmentioning

confidence: 99%

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A New Hybrid Ćuk DC-DC Converter with Coupled Inductors

2020

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An ultra high step‐up DC‐DC converter based on VMC, POSLLC, and boost converter

Mahdizadeh

Gholizadeh

Shahrivar

et al. 2022

IET Power Electronics

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In this article, an ultra‐high step‐up DC‐DC converter has been proposed. The topology of the converter is a combination of a cascaded boost converter, positive output super lift Luo converter (POS LLC), and a voltage multiplier cell (VMC). The lower values of the duty cycle provide a more than 10 times voltage gain. Consequently, the high voltage gain has been provided beside the lower value of the voltage/current stress of the semiconductor and an acceptable value of the efficiency. With a detailed look, it can be understood the voltage gain and efficiency of the converter have become 12 times and 90.5% based on the experimental results while the percentage of the duty cycle has become 50%. Moreover, by the mentioned percentage of the duty cycle, the normalized value of the voltage/current stress of the semiconductors has become lower than 50% by exception of only 3 semiconductor‐based components which have voltage/current stresses more than 50% and lower than the unity. In addition to all the mentioned advantages, the input current has remained continuous which solves the challenges of the input filter's capacitor. Moreover, the voltage/current stresses have been kept low‐valued. The ideal mode of the topology has been discussed for both continuous/discontinuous current modes. The non‐ideal mode of the topology and its related comparisons have been done. A comparison of the voltage/current stresses of the semiconductor‐based components has been done. Moreover, the comparison of the losses and efficiency have been done for the proposed converter and recently suggested topologies. In addition, the efficiency has been discussed for the different values of its effective factors and the resulted behavior has been expressed. Finally, the simulation and experimental outcomes have been extracted for a 120 W output power and compared with the theoretical relations' results.

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A novel high‐efficient step‐up converter with continuous input current, common ground, and minimum stress on semiconductors

Asgarniya

Afjei

2023

IET Power Electronics

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This study proposes a comprehensive analysis of a novel non‐isolated step‐up converter with continuous input current and common ground. The proposed topology provides high voltage gain besides insignificant voltage and current stress across switches and diodes. Consequently, using switches and diodes with low current and voltage withstanding is achievable, leading to high converter efficiency and cost reduction. The voltage and current stress besides steady‐state and efficiency analysis are surveyed. Moreover, the converter's non‐ideal voltage gain analysis employing different components is discussed and compared with recently suggested converters. Additionally, the component losses, efficiency, normalized voltage, and current stresses of the studied converters are collected in tables to simplify the comparison between different topologies. Finally, a 100 W prototype converter is implemented to confirm theoretical performance, and the results are investigated in detail.

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A Transformerless Quadratic Buck-Boost Converter Suitable for Renewable Applications

Cited by 36 publications

References 17 publications

A New Hybrid Ćuk DC-DC Converter with Coupled Inductors

A New Hybrid Ćuk DC-DC Converter with Coupled Inductors

An ultra high step‐up DC‐DC converter based on VMC, POSLLC, and boost converter

A novel high‐efficient step‐up converter with continuous input current, common ground, and minimum stress on semiconductors

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