Characterization in ZVS Mode of SiC MOSFET Modules for MVDC Applications

Fabre, Joseph; Blaquiere, J-M.; Verdicchio, Andrea; Ladoux, Philippe; Sanchez, Sébastien

doi:10.1109/iccep.2019.8890157

Cited by 11 publications

(4 citation statements)

References 7 publications

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“…A water‐cooled 300 kW prototype rated to 1.8 kV and 170 A was used [29] to obtain the experimental results. It is based on the following major parts: ABBs water‐cooled medium‐frequency oil‐immersed transformer; Mersen's water cooled heatsinks; HC5 series‐resonant capacitors from Illinois; LH3 series DC‐link capacitors from Electronic Concept; LEMs series LV and DV sensors; Imperixs BoomBox control with optical interfaces; customized gate‐drivers [30]; Mitsubishi HBM 3.3 kV SiC‐MOSFETs. Specially, the SiC‐MOSFET devices used have encapsulated anti‐parallel SiC‐Diodes, therefore the intrinsic body diode of the MOSFETs are not a concern in this case.…”

Section: Resultsmentioning

confidence: 99%

Analysis of light and no‐load operation of a 300 kW resonant single active bridge based on 3.3 kV SiC‐devices

Fortes

Ladoux

Fabre

et al. 2022

IET Power Electronics

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The resonant single active bridge topology (R‐SAB) operated in the half‐cycle discontinuous current mode (HC‐DCM) is a very attractive solution due to its high efficiency, low complexity and fixed voltage transfer ratio (DCX). However, as expected for a series‐resonant converter (SRC), its DCX operation depends on the resonant tank circuit‐parameters, parasitic capacitive elements and output load. Specially, at light and no‐load operation, when the system is extremely underdamped, it may present a large output overvoltage due to resonance interactions. This is of prime importance for converters using medium voltage (MV) SiC‐MOSFETs, which feature significant output capacitances that can lead to voltage breakdown of the rectifier semiconductors. Therefore, the supposed fixed‐voltage transfer ratio is not entirely valid and deserves a proper understanding due its criticality. This paper reviews the subject, clarifying its root cause and its multifactorial dependencies. Moreover, it provides a simple solution based on a variable dead‐time with fixed magnetizing current experimentally verified with a 300kW/1.8kV R‐SAB prototype implemented with MV SiC‐devices.

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Section: Resultsmentioning

confidence: 99%

Analysis of light and no‐load operation of a 300 kW resonant single active bridge based on 3.3 kV SiC‐devices

Fortes

Ladoux

Fabre

et al. 2022

IET Power Electronics

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“…Following this research, SNCF-Réseau has started a study to convert its 1.5 kV DC railway lines to 9 kV DC [15]. A strategy for replacing the DC railway supply system from low voltage (1.5 kV or 3 kV) to 9 kV has been introduced in Ref.…”

Section: Systems With Mvdc Overhead Linesmentioning

confidence: 99%

Medium‐voltage DC electric railway systems: A review on feeding arrangements and power converter topologies

Sharifi

Ferencz

Kamel

et al. 2022

IET Electrical Syst in Trans

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Medium‐voltage DC (MVDC) electric railway systems have several advantages over conventional DC and AC railway electrification systems. These advantages include higher capacity, possibility of connecting to power networks at lower voltage, removal of neutral sections, smaller line voltage drops, and longer distances between traction power substations. This paper reviews in depth the arrangements for MVDC railway electrification systems proposed in the technical literature and the topologies used for high‐power medium‐voltage AC‐DC converters. With reference to typical requirements of a MVDC railway electrification system, the pros and cons of the topologies are critically analysed. Moreover, this paper reviews the DC‐DC power converter topologies for on‐board power electronic traction transformers, required to interface the MVDC power supply with the traction motors. Finally, the review highlights the existing challenges of MVDC electric railway systems and the potential areas of future research.

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“…Consequently, the turn-off loss in the simulation could be higher than the loss in practice. To obtain more accurate results, the characterizations of these MOSFETs under the ZVS test bench will be realized in the future [38]. Finally, the core loss of the transformers is constant and depends only on the magnetizing current.…”

Section: Static Characteristicsmentioning

confidence: 99%

Silicium-Carbide-Based Isolated DC/DC Converter for Medium-Voltage Photovoltaic Power Plants

et al. 2022

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The production of large-scale photovoltaics (PVs) is becoming increasingly popular in the field of power generation; they require the construction of power plants of several hundred megawatts. Nevertheless, the construction of these PV power plants with conventional low-voltage (LV) conversion systems is not an appropriate technological path. Particularly, large cross-section cables, a high quantity of semiconductors, and the bulky layout of 50/60-Hz step-up transformers make the PV system less competitive in terms of energy efficiency and cost. To overcome these drawbacks, this paper introduces new PV plant topologies with an intermediate medium-voltage direct current (MVDC) collector that requires galvanic isolation for connecting the PV arrays. Then, the design of a power electronic transformer (PET) is proposed, implementing 1.7-kV and 3.3-kV silicium carbide (SiC) power modules. The study confirms that this converter allows the use of medium-frequency (MF) transformers with high power densities while maintaining high efficiency, which facilitates the implementation of isolated medium-voltage (MV) topologies for utility-scale PV power plants.

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Characterization in ZVS Mode of SiC MOSFET Modules for MVDC Applications

Cited by 11 publications

References 7 publications

Analysis of light and no‐load operation of a 300 kW resonant single active bridge based on 3.3 kV SiC‐devices

Analysis of light and no‐load operation of a 300 kW resonant single active bridge based on 3.3 kV SiC‐devices

Medium‐voltage DC electric railway systems: A review on feeding arrangements and power converter topologies

Silicium-Carbide-Based Isolated DC/DC Converter for Medium-Voltage Photovoltaic Power Plants

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