Series-Input Parallel-Output Modular-Phase DC–DC Converter With Soft-Switching and High-Frequency Isolation

Mohammadpour, Ali; Parsa, Leila; Todorovic, Maja Harfman; Lai, Rongjie; Datta, Rajib; Garces, Luis

doi:10.1109/tpel.2015.2398813

Cited by 108 publications

(33 citation statements)

References 26 publications

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“…However, in the current analysis, only full-bridge topologies with single input inductor (boost full bridge) are considered for evaluation due to their scalability and modularity, making them suitable for a wide range of applications: from relatively low-voltage 33,34 to high-voltage/high-power ones. [35][36][37] General properties of the selected topologies are summarized in Table 1. In this study, parallel resonant converters (PRCs) are considered due to their wider soft switching operation range than that of CS series resonant converters.…”

Section: Discussionmentioning

confidence: 99%

“…Some of the control principles proposed are quite flexible and can be adopted to different topologies. However, in the current analysis, only full‐bridge topologies with single input inductor (boost full bridge) are considered for evaluation due to their scalability and modularity, making them suitable for a wide range of applications: from relatively low‐voltage to high‐voltage/high‐power ones …”

Section: Introductionmentioning

confidence: 99%

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Snubberless boost full‐bridge converters: Analysis of soft switching performance and limitations

Blinov

Kosenko

Chub

et al. 2019

Circuit Theory & Apps

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Summary This paper analyses current‐fed (current source) isolated dc‐dc converters that are proposed for various renewable energy and dc microgrid applications, such as photovoltaic, fuel cell, or energy storage systems. The analysis addresses current‐fed (boost) full‐bridge converters that achieve clamping and soft switching without dedicated external auxiliary circuits, such as snubbers or clamps. Such converters have certain limitations that can lead to degraded performance and feasibility due to high circulating energy or low silicone utilization at some operating points. The current study reveals these limitations, highlighting advantages and drawbacks of selected snubberless converters at different operating conditions. The relation between the rms input current and the isolation transformer primary current as well as the cumulative rms current of primary semiconductors is used as figure of merit for converter characterization. This approach can be extended and applied to other topology types and used as a universal tool for performance assessment of snubberless converters without auxiliary circuits for particular operating conditions in various systems.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Snubberless boost full‐bridge converters: Analysis of soft switching performance and limitations

Blinov

Kosenko

Chub

et al. 2019

Circuit Theory & Apps

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“…A second advantage is the reduced number of components in this proposal. A third advantage was found in terms of voltage regulation (PI closed-loop dynamic response), since it is easy to show that the output function of series connected boost converters is the sum of duty cycles to output voltage transfer functions, while, from Equation (12), one can obtain a single second order transfer function, even if the parameters are distinct between stages.…”

Section: Boost Series-connected Comparisonmentioning

confidence: 99%

Fault Tolerant Boost Converter with Multiple Serial Inputs and Output Voltage Regulation for Vehicle-to-Aid Services

Licea¹,

Antonio²

2020

Energies

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The operation of electric vehicles (EV) is currently being segmented into a scenario of smart grids, including vehicle-to-grid (V2G), vehicle-to-home (V2H), vehicle-to-building (V2B), and vehicle-to-load (V2L), among others. Energy-providing services from EVs for medical/health assistance (human, animal, agronomist, environmental, etc.), including emergency services (patrols, fire trucks, etc.), are named/classified in this article as vehicle-to-aid (V2A), since it is expected that they will require special characteristics. For instance, an EV for V2A services must supply regulated voltage by a power electronic converter, even during possible failures, including short-circuits and damages on its components. In this paper, a new configuration of boost converter is proposed, with unlimited serial inputs ( n ), and important properties of fault tolerance, even if the power sources are not isolated; this includes robustness against component failures, variations in the parameters and design errors. Analytic, numerical, and experimental results that validate the operation of the proposed configuration against failures and parameter variation are presented. A numerical comparison with series-connected boost converters is also presented, showing best closed loop performance (PI) with n fewer diodes and n fewer capacitors.

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“…Modular converters have been researched for solving problems linked to current or voltage stresses over semiconductors, as well as for improving reliability in several applications [1]- [3]. In DC-DC converters, isolated modular solutions are gaining interest for low-, medium-and high-voltage applications, driven by factors such as increased demand for energy from renewable sources [4], [5], solid state transformers (SST) [6], the expansion of micro-grid distribution systems [7], [8] and the necessity to meet medium and long-distance direct current projects [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Modular DCM Flyback Converters in Input Parallel Connections with Parametric Mismatches

Fuerback¹,

Dall’Asta²,

Pagliosa³

et al. 2019

Eletrônica de Potência

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This paper analyzes the effects of parameter mismatches in the balance mechanism of modular DC-DC Flyback converters operating in discontinuous conduction mode. The natural current and voltage distributions among modules are evaluated when mismatches on duty cycles, transformer magnetizing inductances and transform turns ratios are present. From these results, the critical values of inductances and duty cycles that assure the discontinuous operation are equated. The smallsignal equivalent circuit for Input-Parallel-Output-Series and Input-Parallel-Output-Parallel connections are found, followed by a simple control strategy. The theoretical analysis is verified by experimental results obtained with a prototype composed of three 200 W Flyback modules, with a rated power of 600 W and maximum efficiency of 95.5%. Results corroborate the proposed equations for the steady state balance and dynamic behavior of both connections, highlighting the modular characteristic of the converter.

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Series-Input Parallel-Output Modular-Phase DC–DC Converter With Soft-Switching and High-Frequency Isolation

Cited by 108 publications

References 26 publications

Snubberless boost full‐bridge converters: Analysis of soft switching performance and limitations

Snubberless boost full‐bridge converters: Analysis of soft switching performance and limitations

Fault Tolerant Boost Converter with Multiple Serial Inputs and Output Voltage Regulation for Vehicle-to-Aid Services

Analysis of Modular DCM Flyback Converters in Input Parallel Connections with Parametric Mismatches

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