A Novel Buck–Boost AC–AC Converter With Both Inverting and Noninverting Operations and Without Commutation Problem

Ahmed, Hafiz Furqan; Cha, Honnyong; Khan, Ashraf Ali; Kim, Heung-Geun

doi:10.1109/tpel.2015.2468585

Cited by 64 publications

(70 citation statements)

References 41 publications

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“…Similarly, the maximum voltage stresses of the high frequency-controlled switches in inverting buck-boost mode of [22] are computed in Equation (9).…”

Section: Voltage Stresses Across Switching Devicesmentioning

confidence: 99%

“…The comparison of inductor ripple and switching currents is carried for the voltage gain of 0.5 and 2 for buck and boost mode respectively. [22](Buck) = 0.333 [22](Boost) = 0.667…”

Section: Inductor Ripple and Switching Currentsmentioning

confidence: 99%

“…The buck operation of the proposed circuit is implemented with high frequency PWM control of M 2 (M 3 ) and D S2 (D S3 ). The total switching losses of the proposed converter and the converter in [22] in inverting mode are computed by assuming same switching current and constant input voltage in Equations (14) and (15) respectively.…”

Section: Switching Lossesmentioning

confidence: 99%

“…The non-z-source AC voltage controllers, in [22][23][24][25][26], eliminate the extra circuit elements but their inverting buck-boost operation requires high voltage switching stresses, high inductor ripple current and high switching currents. This results in high switching, conduction, and filtering of the inductor's DCR resistance losses.…”

Section: Introductionmentioning

confidence: 99%

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A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation

et al. 2019

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In this research, a new single-phase direct AC-to-AC converter, operating in buck and boost mode, with a bipolar voltage gain, is proposed. The operation is accomplished through high frequency direct and indirect PWM control of a single switch with low voltage stresses. This reduces, not only the control effort, but also the switching losses. The low voltage stresses across the high frequency switches, reduce the dv/dt problem significantly without any loss and bulky voltage snubber arrangement. The operation, in its all-operating modes, has a low inductor ripple current and switching current. The proposed converter may be employed as an AC voltage restorer in a power distribution system to cope with the voltage sag and swell issues. The detailed analysis of the proposed converter is carried out in order to compare its performance with the existing converters. The simulation results obtained using the MATLAB/Simulink environment are verified through experimental results.

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“…Similarly, the maximum voltage stresses of the high frequency-controlled switches in inverting buck-boost mode of [22] are computed in Equation (9).…”

Section: Voltage Stresses Across Switching Devicesmentioning

confidence: 99%

“…The comparison of inductor ripple and switching currents is carried for the voltage gain of 0.5 and 2 for buck and boost mode respectively. [22](Buck) = 0.333 [22](Boost) = 0.667…”

Section: Inductor Ripple and Switching Currentsmentioning

confidence: 99%

Section: Switching Lossesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation

et al. 2019

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“…By evaluating the requirements regarding AC voltage control, the circuit shown in Fig. 1 seems the most appropriate one and such a system is used in the major part of all the range of papers devoted to the investigation and development of this kind of AC/AC conversion devices [1]- [3]. The papers mostly describe conversion principles for variations of the possible diagrams, applying simplified expressions for voltage gain, simulation of processes, results of experimental investigations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the AC/AC Buck-Boost Converter

Raņķis

Prieditis

2017

PEE

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-This paper reviews the possibility of implementing a buck-boost AC/AC converter with a changeable configuration, which ensures quasi-sinusoidal characteristics of source and load current. Load is made up of active and inductive components, with a parallel-connected smoothing capacitor whereas at the input stage a current-smoothing LC input filter is applied. The process is controlled by four bidirectional semiconductor switches, from which two are active in each of the operation modes. An explanation of electromagnetic processes in both of the operating modes is given, in order to show how the mathematical description of the circuit functionality is acquired. Computer simulation results are introduced as well, providing a comparison of calculated and simulated parameters at both the buck and boost operation cases.

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A family of single‐phase boost AC‐AC converters based on impedance network cells with symmetric bipolar operation

Fathipour,

Mousavi,

Babaei

2024

Circuit Theory & Apps

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SummaryIn this paper, a family of single‐phase boost AC‐AC converters based on impedance network cells with symmetric bipolar operation is proposed. The proposed converters exhibit a range of voltage gains as a result of non‐inverting and inverting boost operations, which are influenced by the input voltage and various impedance source cells. The converters leverage inherent commutation to address the commutation problem without requiring snubber circuits and safe commutation strategy. Additionally, high‐speed switching is achieved by preventing power MOSFETs' body diode conduction and related poor reverse recovery issues. The design incorporates a simple and flexible switching strategy to produce step‐change frequency at the output, using only four switches to achieve both step‐changed frequency operation and output voltage regulation. Furthermore, by reducing the total stored energy of passive components, the proposed converters effectively decrease volume, weight, and cost. The operational modes of the converters are elucidated, and their key relationships are summarized in tabular format. Finally, experimental validation through a laboratory prototype confirms the performance accuracy of the proposed converters at frequencies 25, 50, and 100 Hz.

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A Novel Buck–Boost AC–AC Converter With Both Inverting and Noninverting Operations and Without Commutation Problem

Cited by 64 publications

References 41 publications

A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation

A Single-Phase Buck and Boost AC-to-AC Converter with Bipolar Voltage Gain: Analysis, Design, and Implementation

Investigation of the AC/AC Buck-Boost Converter

A family of single‐phase boost AC‐AC converters based on impedance network cells with symmetric bipolar operation

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