Presented a transformer‐less buck‐boost DC–DC structure with vast voltage range

Shayeghi, Hossein; Pourjafar, Saeed; Sedaghati, Farzad

doi:10.1049/pel2.12257

Cited by 6 publications

(8 citation statements)

References 25 publications

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“…The RMS values of inductors are equate with average current of inductors which are equal to Equation ( 22) and (23).…”

Section: Efficiency Analysismentioning

confidence: 99%

See 1 more Smart Citation

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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“…The RMS values of inductors are equate with average current of inductors which are equal to Equation ( 22) and (23).…”

Section: Efficiency Analysismentioning

confidence: 99%

“…According to this figure, the output voltage is 48 V, which is confirmed by the simulated waveform shown in Figure 14a. Figure 17b-d shows 14b,c and the Equations ( 22) and (23). Figure 18a demonstrates the voltage across capacitor C 1 and the voltage stress across the switch S 1 .…”

Section: Step-up Modementioning

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

View full text Add to dashboard Cite

show abstract

“…The conversion ratio of this converter is not high enough. In reference, 21 a new buck–boost converter is presented to use in green energy and LED drivers. Since this converter consists of only one active switch, its conversion ratio is not considerable.…”

Section: Introductionmentioning

confidence: 99%

A new transformerless semi‐quadratic buck–boost converter based on combination of Cuk and traditional buck–boost converters

Hosseinpour

Ahmadi

Seifi

et al. 2022

Circuit Theory & Apps

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In this paper, a new transformerless buck–boost converter is proposed. This converter is based on combining two basic converters, including Cuk and traditional buck–boost converters, along with a voltage multiplier (VM) at the output side. The proposed semi‐quadratic buck–boost converter operates in continuous conduction mode (CCM) and provides two operation modes by turning the switches on and off. This converter has some merits such as a wide conversion ratio and continuous input current. The proposed converter consists of two switches with simultaneous operation resulting in simplicity in control. A modular configuration and a wide range of duty cycles are available through the proposed converter, which causes higher or lower output voltage and facilitates the converter maintenance. The calculations of the ideal and the real voltage gain, voltage stress of switches and diodes, efficiency, and design consideration of elements are given in this paper. Finally, a prototype is implemented, and experimental waveforms are obtained to prove and validate the simulation results as well as the theoretical analysis of the proposed converter.

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“…5,6 An alternative and low-cost approach to increase the voltage level of PV panels is the use of high step-up DC-DC converters. 7,8 DC-DC converters with a high output voltage, in fact, high voltage gain, can connect PV panels to a highvoltage DC bus. 9 At first look, the classic boost converter may be suitable for this work due to the its low volume, low number of elements, and affordable cost.…”

Section: Introductionmentioning

confidence: 99%

“…An alternative and low‐cost approach to increase the voltage level of PV panels is the use of high step‐up DC‐DC converters 7,8 . DC‐DC converters with a high output voltage, in fact, high voltage gain, can connect PV panels to a high‐voltage DC bus 9 .…”

Section: Introductionmentioning

confidence: 99%

A dual‐output single‐input non‐isolated DC‐DC converter with reduced semiconductors stress

Radmanesh

Jashnani

Pourjafar

et al. 2022

Circuit Theory & Apps

Self Cite

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This work proposes a novel topology of two‐output high voltage rate DC‐DC converter based on coupled inductor and voltage multiplier cells (VMCs) techniques for renewable energy usages like photovoltaic (PV) systems. The proposed structure has two independent output ports with two voltage gains (M1 and M2). Low voltage stress across the power switch and diodes, common ground between input and output ports, high efficiency, and reduced number of elements are the advantages of the suggested converter. The used diodes are switched at zero current switching (ZCS) and zero voltage switching (ZVS) conditions, which reduce the losses of diodes and subsequently increase the power efficiency. Due to the usage of the coupled inductor, there is no need to a high value of the power switch's duty cycle. Therefore, a low conduction loss and higher efficiency can be obtained. On the other hand, because of the reduced voltage stresses, low rated semiconductors can be used for operation of the presented converter, which decrease the cost and the volume. To demonstrate the performance and effectiveness of the proposed topology, operation principles, steady‐state and efficiency analysis, and also the comparison assessment are provided. Finally, a 200 W experimental development with 50 kHz operation frequency, 20 V input voltage, and 200 and 100 V loads voltages has been implemented in the lab to prove the mathematical surveys.

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Presented a transformer‐less buck‐boost DC–DC structure with vast voltage range

Cited by 6 publications

References 25 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 semi‐quadratic buck–boost converter based on combination of Cuk and traditional buck–boost converters

A dual‐output single‐input non‐isolated DC‐DC converter with reduced semiconductors stress

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