Reliability Evaluation of Isolated Buck-Boost DC-DC Series Resonant Converter

Bakeer, Abualkasim; Chub, Andrii; Shen, Yanfeng

doi:10.1109/ojpel.2022.3157200

Cited by 20 publications

(3 citation statements)

References 27 publications

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“…It is caused by the overlap between the drain current and the drain-source voltage during the turn-on or turn-off moment. The switching losses include turn-on loss and turn-off loss which can be calculated by Equation (15) [25]:…”

Section: Switching Lossmentioning

confidence: 99%

A Switched Capacitor Inverter Structure with Hybrid Modulation Method Lowering Switching Loss

Zhao

Liang

et al. 2023

Energies

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The high-frequency modulation method (HFM) for a switched capacitor (SC) inverter often leads to high switching loss since it increases switching frequency. In order to reduce the switching frequency and switching loss in the HFM for SC inverter, this paper proposes a novel hybrid modulation strategy as well as a corresponding demo switched capacitor topology. The hybrid strategy limits the number of high-frequency switches, thus reducing the switching loss significantly. Meanwhile, the demo topology maintains the merits of current switched capacitor inverter such as low switch count, quadruple voltage-boosting ability and self-balancing capacity. The principle of the hybrid modulation method and the circuit configuration of the inverter are analyzed in detail. And comparisons are introduced to demonstrate the advantages of the proposed modulation method and topology. Finally, experimental results have proved the feasibility of the proposed inverter.

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Section: Switching Lossmentioning

confidence: 99%

A Switched Capacitor Inverter Structure with Hybrid Modulation Method Lowering Switching Loss

Zhao

Liang

et al. 2023

Energies

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“…The constant phase of the diagram, placed in the middle part of the curve, describes the useful lifetime of a product. This stage contains random failures which are typically caused by random fluctuations and transients of stresses exceeding the strength of the component or mishandling of the product [61].…”

Section: A Component Level Lifetime Predictionmentioning

confidence: 99%

An Overview of Lifetime Management of Power Electronic Converters

et al. 2022

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An expected lifetime of converters is of great importance for optimal decision-making in the planning of modern Power Electronic (PE) systems. Hence, the lifetime management of power electronic systems has attracted a lot of attention in academia and industry. This paper is a guideline for managing the lifetime of power converters. Analyzing the different kinds of failures, failure modes and their corresponding mechanisms are investigated in the first section along with the failure data needed as input parameters of the assessment. In the second section, lifetime prediction in two aspects of component-level and system level is discussed and all the possible techniques to achieve them are investigated and compared. All the steps required to predict the lifetime in the component-level including electrothermal modeling, cycle counting, lifetime model, damage accumulation, parameter estimation, and lifetime distribution are described and then system level methods consisting of reliability block diagrams, fault-tree analysis, and Markov chains are examined and compared. The last section contains the roadmap of the lifetime extension including the reliable design and condition monitoring. INDEX TERMSReliability, Lifetime management, Lifetime analysis, Lifetime prediction, Lifetime extension, Empirical model, Physics of failure, failure mechanism FIGURE 1. Guideline of the reliability of power electronic systems.

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“…It is possible to find some works concerning reliability of power electronic converters in the literature. The reliability of an isolated buck-boost DC-DC converter (IBBC), designed with a series resonant converter (SRC) configuration, is investigated in [11]. Reference [12] proposes a new method to assess the reliability of fault-tolerant power converters, considering wear-out failure.…”

Section: Introductionmentioning

confidence: 99%

Wear-Out Analysis of a Grid-Forming Two-Phase Three-Wire Converter Under Unbalanced Load

de Oliveira,

Cupertino,

Brito

et al. 2024

IEEE Open J. Power Electron.

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The grid-forming converter that supplies voltage magnitude and frequency is a key element for isolated remote communities, and then wear-out analysis is an essential figure of merit. Therefore, this paper proposes the two-phase three-wire (2Φ3W) grid forming converter applied in a case study of isolated riverside communities in the Brazilian Amazon region. The proposed xyn-converter displaces the voltage line angle in 180 • , differing from αβn-converter and abn-converter that displace voltage line angle in 90 • and 120 • respectively. First, the authors have also proposed a semiconductor current stress evaluation for 2Φ3W converters comparing the RMS current. Then, the lifetime evaluation of the three evaluated grid-forming converters is conducted. The results show that the converter operating in the xynconverter presents the highest reliability among the three converters. Finally, the thermal stress analysis is validated by means of a 2Φ3W converter prototype with an open semiconductor module. For the evaluated converters, the xyn-converter has the least thermal stress for balanced and unbalanced load conditions and therefore the longest lifespan. The experimental validation shows that the average temperature of the xynconverter is 19.4% and 23.3% lower than both the abn-converter and the αβn-converter under balanced load conditions.INDEX TERMS Grid-forming converter, isolated ac power grids, lifetime consumption, wear-out.

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Reliability Evaluation of Isolated Buck-Boost DC-DC Series Resonant Converter

Cited by 20 publications

References 27 publications

A Switched Capacitor Inverter Structure with Hybrid Modulation Method Lowering Switching Loss

A Switched Capacitor Inverter Structure with Hybrid Modulation Method Lowering Switching Loss

An Overview of Lifetime Management of Power Electronic Converters

Wear-Out Analysis of a Grid-Forming Two-Phase Three-Wire Converter Under Unbalanced Load

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