A new transformerless quadratic buck–boost converter with high‐voltage gain ratio and continuous input/output current port

Okati, Mustafa; Eslami, Mahdiyeh; Shahbazzadeh, Mehdi Jafari; Shareef, Hussain

doi:10.1049/pel2.12304

Cited by 14 publications

(15 citation statements)

References 38 publications

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“…S 2 of the converters in [24,26], while it is similar to the voltage stress ratio of S 2 of the converter in [27] Similarly, Figure 12 represents the voltage stress ratio across the diodes regarding voltage gain (M) for the proposed and reference converters. The voltage stress ration across the diode D 1 of the proposed converter has a lower value in comparison with diode D 2 of the converters in [22,24,26], and it is similar to the voltage stress ration of the diode D 2 of the converter in [27]. The voltage stress ratio across diodes D 2 and D 3 of the proposed converter has the same value and is smaller than other compared converters.…”

Section: Figure 13mentioning

confidence: 92%

“…In addition, it does not have a continuous input current. In [24], a new transformerless quadratic buck‐boost converter with continuous input current and negative polarity has been studied. In [25], an improved buck‐boost converter is reported in order to enhance the step‐up voltage gain as well as to increase the converter efficiency.…”

Section: Introductionmentioning

confidence: 99%

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A new transformerless buck‐boost converter with improved voltage gain and continuous input current

Hosseinpour,

Ahmadi,

Seifi

et al. 2024

IET Power Electronics

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This paper proposes a new transformerless buck‐boost converter with an extended voltage conversion ratio. This converter has semi‐quadratic voltage gain, which provides more gain with lower duty cycles. This converter has a simple structure and easy implementation, which reduces the cost and increases efficiency. The proposed converter operates in continuous conduction mode and provides two operation modes by turning on and off the switches. The suggested converter has continuous input current and low input current ripple, which is important when utilizing renewable energy sources. The calculation of the proposed converter includes ideal and practical voltage gain, current calculations, voltage stresses of the switches and diodes, current stress of the switches, parameter design, efficiency, and a brief analysis of discontinuous conduction mode and boundary conditions. The proposed converter provides efficiency of about 93.1% in boost mode and 92.14% in buck mode at 50 W output power. The suggested converter varies the input voltage from 20 to 48 V in boost mode and changes the input voltage from 20 to 10.4 V in buck mode. Finally, a laboratory prototype has been built to prove and evaluate the simulation results and theoretical analysis of the proposed converter.

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Section: Figure 13mentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

A new transformerless buck‐boost converter with improved voltage gain and continuous input current

Hosseinpour,

Ahmadi,

Seifi

et al. 2024

IET Power Electronics

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show abstract

“…One working mode is a step‐up mode and other is a step‐up/down mode. A transformerless quadratic buck–boost converter with negative output is proposed in [34]. The output and input currents of the structure are continuous due to the presence of inductive filters in the output and input ports.…”

Section: Introductionmentioning

confidence: 99%

A new transformerless DC/DC converter with dual operating modes and continuous input current port

Okati

Eslami

Shahbazzadeh

2023

IET Generation Trans & Dist

Self Cite

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In this work, a transformerless DC/DC converter is presented with dual operating modes buck-boost procedure. As a simple structure and continuous input current port, the system acts as a common ground between the output and input terminal. One operating mode, quadratic voltage gain ratio is D/(1-D) 2 , and other mode is D/(1-D). In the present study, the continuous conduction mode (CCM), steady-state conditions were assumed to analyze efficiency and small-signal modeling by replacing parasitic resistance effects. The findings revealed that in comparison with other buck-boost converters, the two voltage gain ratios were provided with fewer components and lower total switching device power in dual operating modes. Therefore, proposed converter can attract considerable attention for renewable energy applications, especially photovoltaic systems. Ultimately, the experimental findings of a prototype made in the laboratory are provided along with the received waveforms from the simulation in PLECS for validation purposes.

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“…To further decrease the voltage stress of the power switches, a family of cascading of boost and ZETA structure converters are proposed in Veerachary and Khuntia 25 . Compared with the above relevant dual switches converter, converter in Okati, et al 26 has higher conversion ratio. To solve the effect of non-common and hold on the voltage gain with previous converter, a modified SEPIC converter is proposed in Wang, et al 27 .…”

Section: Introductionmentioning

confidence: 99%

Implementation of a novel buck-boost converter based on coupled inductor for renewable energy applications

Luo

Chen

Hong

et al. 2023

Preprint

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A coupled inductor based on dual switches buck-boost converter is proposed in the article, which can be used in renewable energy applications. Wide conversion ratio can be realized by regulating turns ratio of the coupled inductor and the duty cycle. The topology has a quadratic- like voltage gain, and the low voltage stress and current stress. Combing the passive clamping circuit to recover leakage energy, the voltage spikes of power switches are suppressed, improving the efficiency. Moreover, it has the merits of continuous input current and common ground. To demonstrate the superior performances of the presented converter, the principle of operation and steady-state analysis are presented in detail. At last, a 100 W experimental prototype was designed to verify the correctness of the theoretical analysis, with a maximum efficiency of 95.7% in step-up mode and 96.8 % in step-down mode.

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A new transformerless quadratic buck–boost converter with high‐voltage gain ratio and continuous input/output current port

Cited by 14 publications

References 38 publications

A new transformerless buck‐boost converter with improved voltage gain and continuous input current

A new transformerless buck‐boost converter with improved voltage gain and continuous input current

A new transformerless DC/DC converter with dual operating modes and continuous input current port

Implementation of a novel buck-boost converter based on coupled inductor for renewable energy applications

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