An Isolated High-Efficient Impedance-Source AC-AC Converter with Extended Buck-Boost Operation for DVR Application

Abdoli, Iman; Mosallanejad, Ali

doi:10.1109/pedstc57673.2023.10087125

Cited by 2 publications

(4 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Like other switch-mode ac-ac converters, the converter losses are divided into conduction loss and switching loss. The conduction losses of inductors, capacitors, and power switches are deduced from (12) to (14).…”

Section: Losses and Efficiencymentioning

confidence: 99%

“…The main contributions of PWM ac-ac topologies that distinguish them from prior architectures are the single-stage conversion and the straightforward structure and modulation pattern [9]. Because of these characteristics, it has been promoted further to be utilized for power quality compensation [10][11][12][13], induction heating systems [14], and inductive power transmission [15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High step‐up direct ac‐ac boost converter with optimal component counts based on SEPIC

Lahooti Eshkevari,

Abdoli,

Karimi Hajiabadi

et al. 2024

IET Power Electronics

Self Cite

View full text Add to dashboard Cite

This paper introduces a new direct step‐up ac‐ac converter designed based on the SEPIC. It provides a higher step‐up conversion ratio than other counterparts with valuable features like high efficiency, reasonable input and output total harmonic distortions (THD), continuous input current waveform, common ground, few components, and single‐stage conversion without snubber and LC filters. Unlike most counterparts, the duty cycle can be varied between zero and one in boost operation and is not limited to any value below one. The voltage stress on one switch is reduced by increasing the winding coefficient of the utilized coupled inductor, and current stress on another is independent of this coefficient. It reduces the switches' losses and improves the converter efficiency. Thanks to the above attributes, the proposed converter is suitable for inductive power transfer from low‐voltage ac sources, operating as an ac voltage regulator for sensitive ac loads, and any applications that require a boost converter with few components. This article shows the converter's operation principle and evaluates its performance through experiments on a 225 W prototype. Accordingly, the maximum obtained efficiency is 95.4%. The input and output current THDs for the nominal inductive load equal 4.5 and 2.8%, respectively. Results confirm the claims.

show abstract

Section: Losses and Efficiencymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High step‐up direct ac‐ac boost converter with optimal component counts based on SEPIC

Lahooti Eshkevari,

Abdoli,

Karimi Hajiabadi

et al. 2024

IET Power Electronics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Direct AC-AC converters are the second type of AC-AC converters, only used for regulating the output voltage amplitude. [22][23][24][25][26] The direct AC-AC converters' idea is derived from the DC-DC topologies by using bidirectional switches instead of the converter semiconductors with the unique safe commutation strategy. The efficiency has been improved by reducing the power switch counts.…”

Section: Classifications Of Ac-ac Convertersmentioning

confidence: 99%

“…38 The parameters α% and β% are used to obtain the minimum value of inductors, magnetizing inductors, and capacitors. The total volume of the converter is achieved by summating the volume of all passive components, as represented in Equation (26). The volume metric of the converters in Table 1, by assuming that the ρ EC and ρ EL are equal to one, has been plotted in Figure 9.…”

Section: Volume Metric Analysismentioning

confidence: 99%

An isolated high‐gain impedance source‐based single‐phase AC–AC converter with safe commutation and variable output frequency

Abdoli

Mosallanejad

2023

Circuit Theory & Apps

Self Cite

View full text Add to dashboard Cite

SummaryConventional AC–AC converters have some critical disadvantages, such as inappropriate input and output power quality features, employing snubber circuits to suppress the voltage stress on high‐frequency switches without a safe commutation method that increases the converter size and cost, confined voltage gain, and using huge passive components. This paper proposes an isolated high‐gain single‐phase AC–AC converter with variable output frequency, extended voltage gain, and a safe commutation strategy. Ten semiconductors are only employed for the proposed topology that only two switches and two diodes are operated with high‐frequency PWM signals. This new topology has noteworthy specifications like continuous input and output current, voltage isolation, extended inverting and non‐inverting buck‐boost modes, and frequency regulation. The high voltage gain has been achieved with small values for passive components in the impedance source section, reducing the volume and cost of the converter. The impedance source‐based section of the converter comprises one input inductor, two coupled inductors, and two capacitors in each converter leg. A safe commutation strategy has been designed and applied to the converter to mitigate the voltage and current stresses without extra snubber circuits. The number of semiconductors that simultaneously conduct in each state of the converter has been reduced. So, the conduction loss of the converter diminished. The achieved efficiency equals 95.5% and 93.5% in step‐down and step‐up modes, respectively, validated by an accurate power loss model and experimental analysis. An experimental prototype has been designed to confirm the performance of the suggested converter. Results confirm the theory and operation of the proposed converter.

show abstract

An Isolated High-Efficient Impedance-Source AC-AC Converter with Extended Buck-Boost Operation for DVR Application

Cited by 2 publications

References 20 publications

High step‐up direct ac‐ac boost converter with optimal component counts based on SEPIC

High step‐up direct ac‐ac boost converter with optimal component counts based on SEPIC

An isolated high‐gain impedance source‐based single‐phase AC–AC converter with safe commutation and variable output frequency

Contact Info

Product

Resources

About