Efficiency-based power MOSFETs size optimization method for DC-DC buck converters

Wang, Wanjin; Wei, Rongshan; Yin, Yadong

doi:10.1109/pee.2019.8923036

Cited by 11 publications

(3 citation statements)

References 5 publications

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“…This circuit is made up of several components such as diodes (D), inductors (L), capacitors (C), and resistors (R). The DC-DC current converter has a high conversion efficiency, making it suited for use in low-power applications [11]. The DC/DC boost converter operates on the basis that when the switch is turned "ON," the inductor is directly linked to the input voltage source, resulting in a charging process.…”

Section: Dc/dc Boost Convertersmentioning

confidence: 99%

Comparative Model of Single-phase AC Cycloconverter for 1000Wp Photovoltaic Grid-connected 220VAC-50Hz

Iskandar

Zainal

Urbaningtyas

2022

JSE

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Currently, the Electrical Engineering Laboratory (EEL) of Universitas Jenderal Achmad Yani has a 1 kWp photovoltaic (PV) system. However, in order to fulfill the overall load, the hybrid link to the grid must be improved. The PV system and the grid must be synchronized in terms of voltage, frequency, and phase. This article presents comparative simulations of AC-AC converter models of power electronics component variants using MATLAB 2019a. Among other stages is to model the DC-DC Converter in order to enhance the output voltage of the solar panel by identifying the circuit characteristics. The second stage involves simulating the MOSFET-based DC-AC Converter circuit, which is used to convert DC to AC. The use of switching Thyristor, Gate Turn-Off Thyristor (GTO), and Insulated Gate Bipolar Transistor (IGBT) in an AC-AC phase converter to connect to the grid is examined in this range. Non-linear and linear loads are used to represent the load on the AC Cycloconverter range. Based on the results of the modeling and analysis of the PV 1 kWp system, the AC Cycloconverter in the first stage may provide a frequency of 50 Hz with a voltage drop of 235.4 V for the line and 231.9 V for the non-linear, which meets the AC Cycloconverter criterion.

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Section: Dc/dc Boost Convertersmentioning

confidence: 99%

Comparative Model of Single-phase AC Cycloconverter for 1000Wp Photovoltaic Grid-connected 220VAC-50Hz

Iskandar

Zainal

Urbaningtyas

2022

JSE

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“…Parameter values are taken from Formisano et al (2021), Anthon et al (2015); and Subhashree et al (2019) for L boost and C boost ; from Wei et al (2019), Subhashree et al (2019); Touss et al (2020); and Wang et al (2019) for L buck and C buck ; from Dimitrov et al (2020) and Mohammeda et al (2019) for L buck–boost and C buck–boost , with IGBT technology; and finally from Alharbi (2017); López del Moral et al (2018); and Raj et al (2020) for L buck–boost and C buck–boost with SiC-MOSFET technology.…”

Section: Modellingmentioning

confidence: 99%

Impact of nearby lightning on photovoltaic modules converters

Barmada

Formisano

Hernández

et al. 2021

COMPEL

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Purpose The lightning phenomenon is one of the main threats in photovoltaic (PV) applications. Suitable protection systems avoid major damages from direct strikes but also nearby strikes may induce overvoltage transients in the module itself and in the power conditioning circuitry, which can permanently damage the system. The effects on the PV system sensibly depend on the converter topology and on the adopted power switch. In the present study, a comparative analysis of the transient response due to a nearby lightning strike (LS) is carried out for three PV systems, each equipped with a different converter, namely, boost, buck and buck–boost, based on either silicon carbide metal oxide semiconductor field effect transistors (SiC MOSFET) or insulated gate bipolar transistors controlled power switch devices, allowing in this way an analysis at different switching frequencies. The purpose of this paper is to present the results of the numerical analysis to help the design of suited protection systems. Design/methodology/approach Using a recently introduced three-dimensional semi-analytical method to simulate the electromagnetic transients caused in PV modules by nearby LSs, we investigate numerically the effect of a LS on the electronic circuits connecting the module to the alternate current (AC) power systems. This study adopts numerical simulations because experimental analyses are not easy to perform and does not grant a sufficient coverage of all statistically relevant aspects. The approach was validated in a previous paper against available experimental data. Findings It is found that the load voltage is not severely interested by the strike effects, thanks to the low pass filters present at the converter output, whereas a relatively high overvoltage develops between the negative pin of the inner circuitry and the “ground” voltage reference. The overcurrent present in the active switches is hardly comparable because of the different topologies and working frequencies; however, the highest overcurrent is observed in the buck converter topology, with SiC MOSFET technology, although it shows the fastest decay. Originality/value This research proposes, to the best of the authors’ knowledge, a comprehensive comparison of the indirect lighting strike effects on the converter connected to PV panels. A proper design of the lightning and surge protection system should take into account such aspects to reduce the risk of induced overvoltage and overcurrent transients.

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“…Majority of state-of-the-art papers do not consider all kinds of losses: [2] ignores gate drive loss, while [3] and [4] do not consider dead time loss. [5]- [9] do not take into account IV overlap loss nor dead time loss. Some others don't even break down losses to analyze the losses significance and distribution across output power [10]- [27].…”

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confidence: 99%

Power-Conversion Efficiency: Loss Dominance, Optimization, & Design Insight

Guérin¹,

Rincón-Mora²

2021

2021 IEEE International Symposium on Circuits and Systems (ISCAS)

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Power-conversion efficiency is critical in power supplies. Switched inductors are popular in this space because they can deliver a large fraction of the power they draw. This fraction hinges on the power that switches, diodes, resistances, and capacitances need to conduct and transfer power to the output. So, understanding how these loss mechanisms set and dictate efficiency across power levels is important, especially when designing and targeting particular load levels. This article details how these losses scale, when they dominate, and how and when they balance. Gate drive and controller losses are the ones that become a smaller fraction of input power as output power increases, leading to the increase of the power efficiency at the low-end of discontinuous conduction scale, while only gate charge loss plays this role at the low-end of the continuous conduction scale. Ohmic loss is the one that reduces power efficiency at the high-end of discontinuous and continuous conduction scale as ohmic loss becomes a larger fraction of input power as output power increases. Power efficiency peaks in continuous conduction when ohmic loss and gate charge losses balance. Overlap and dead time losses, although still important, do not shape the power efficiency in continuous conduction mode. In discontinuous conduction mode, all losses play a role and efficiency peaks when they all trickily balance. With this insight, predicting and controlling when efficiency rises, peaks, and falls across loads are possible. The fractional loss analysis and the design insight that make this possible are new contributions to the state of the art.

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Efficiency-based power MOSFETs size optimization method for DC-DC buck converters

Cited by 11 publications

References 5 publications

Comparative Model of Single-phase AC Cycloconverter for 1000Wp Photovoltaic Grid-connected 220VAC-50Hz

Comparative Model of Single-phase AC Cycloconverter for 1000Wp Photovoltaic Grid-connected 220VAC-50Hz

Impact of nearby lightning on photovoltaic modules converters

Power-Conversion Efficiency: Loss Dominance, Optimization, & Design Insight

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