Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 66 for “"gate driver"”.
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Galvanic isolation interface and gate driver for power switching systems in GaN technology [Interfaccia di isolamento galvanico e gate driver per sistemi di commutazione di potenza in tecnologia GaN]
… e circuiti innovativi per pilotaggio di gate. Inoltre, la tesi introduce tecniche innovative per affrontare le sfide associate ai dispositivi GaN, come l’elevata variabilità dei parametri, l’assenza di transistor a canale p e la necessità di una protezione ESD efficace. I risultati …
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A power supply circuit for gate driver of flying capacitor multi-level converters
This work investigates new circuits to provide power for the gate drivers of flying capacitor multi-level (FCML) converters. FCML converters with new GaN power switches have received increased attention due to their potential to achieve high conversion efficiency and high power density. However, …
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Gate Driver for Phase Leg of Parallel Enhancement-Mode Gallium-Nitride (GaN) Transistors
… of this design is limited by both the gate driver and the device shortcircuit robustness. Due to the fast switching speed of the GaN HEMT, the false turn-on phenomenon caused by the Miller effect can be a problem. A shoot through may occur with one switch false turn on. The Miller clamp …
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A Basic Isolated Half-Bridge Silicon Carbide Gate Driver for Electric and Hybrid Electric Vehicles
A Basic, Isolated, Half-Bridge Silicon Carbide Gate Driver was designed and validated using Cadence and SPICE. The architectures of similar gate drivers were studied and simplified to reduce the total area of the gate driver. The fabrication process was also carefully selected to minimize the total …
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Enhanced Gate-Driver Techniques and SiC-based Power-cell Design and Assessment for Medium-Voltage Applications
… For the MV SiC MOSFET device, a high-performance gate-driver (GD) is a key component required to maximize the beneficial SiC MOSFET characteristics. GD units must overcome associated challenges of electro-magnetic interference (EMI) with regards to common-mode (CM) currents and cross-talk, low …
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A Wide Bandgap Silicon Carbide (SiC) Gate Driver for High Temperature, High Voltage, and High Frequency Applications
… and switching speed. Integration of gate driver circuitry on the same chip, or in the same package, as the power device would significantly reduce the parasitic inductance, require far less thermal management paraphernalia, reduce cost and size of the system, and result in more …
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Advancements in resonant and current source gate driving techniques for fast switching Wide Band Gap (WBG) Metal Oxide Field Effect Transistors (MOSFETs)
… Field Effect Transistor, like the Voltage Source Gate Driver (VSGD), prove to be inefficient for high-frequency operation, especially in applications where Wide-Bandgap devices are used. This is because of their losses and poor control over the switching transitions. This thesis investigates …
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Design of Area-Efficient Integrated Gate Drivers
MOSFET gate drivers are important in modern power electronics due to the ubiquity of applications that require the fast and controlled switching of power MOSFETs. A controller serves as the first building block in many such systems, but with limited drive current and logic level voltage signals, it …
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Evaluation of Voltage-Controlled Active Gate-Drivers for SiC MOSFET Power Semiconductors
… (EMI) related phenomena. Conventional gate-drivers are very limited in the way that they can control this high dv/dt, and this leads to the use of active gate-drivers. This thesis will explore the use of an active voltage-controlled gate-driver for SiC devices, utilizing transiently a …
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Electromagnetic Interference and Compatibility within SiC-based Medium Voltage Converters
… has demonstrated various approaches to mitigate the CM current of the gate driver, the mechanism of the gate driver's false triggering remains unknown. It is of great importance to study the mechanisms by which the noise is induced on low power logic circuitry caused by the switching …
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EMI Suppression and Performance Enhancement for Truly Differential Gate Drivers
… has been accompanied by an improvement in gate drive technology aimed at resolving EMI challenges, albeit at a higher component and cost expense. This thesis aims to design, analyze, and implement a recent innovative differential gate driver for a 1.2 kV SiC MOSFET full bridge module. The …
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Investigation of Power Semiconductor Devices for High Frequency High Density Power Converters
… power converter applications have been investigated. Firstly, the methodology is developed to evaluate the power semiconductor devices for high power density applications. The power density figure of merit (PDFOM) for power MOSFET and IGBT are derived from the junction temperature rise, power …
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High-Frequency Oriented Design of Gallium-Nitride (GaN) Based High Power Density Converters
… GaN HEMT under research, including narrow safe gate operating area, increased switching overshoot, increased electromagnetic interference (EMI) in the gate loop and the power stages, the lack of the modules of packages for high current application, high gate oscillation under parallel operation. …
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PCB Busbar Design and Verification for a Multiphase SiC-based All-electric Aircraft Powertrain Converter
… the part of the inverter system, the integrated gate driver is designed with SPI communication to drive the wide bandgap SiC power modules. With feature of drain-to-source current sensing feature, the gate driver could also provide over-current protection to fast-switching SiC power modules. The …
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Design and implementation of Silicon-Carbide-based Four-Switch Buck-Boost DCDC Converter for DC Microgrid Applications
… been selected as the candidate. This work investigates the operation principle of the FSBB converter, and a digital real-time low-loss quadrangle current mode(QCM) control implementation, which satisfies the zero-voltage-switching (ZVS) requirements, is proposed. With the QCM control method, the …
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Pulsed MOSFET based linear transformer driver
… a high speed current source MOSFET gate driver design specific to the application is proposed. Further, an inductive voltage adder system which utilises multiple lower voltage pulse sources driven by MOSFETs and outputs a higher voltage which is the summation of the total number of …
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Characterization and Modeling of 4H-SiC Low Voltage MOSFETs and Power MOSFETs
… available 1200 V, 20 A power MOSFET. A gate driver chip has been designed and fabricated in 4H-SiC using the developed models. The gate driver chip will drive commercially available power MOSFETs in an integrated AC/DC converter application.</p>
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PCB-Embedded Phase Current Sensor and Short-Circuit Detector for High Power SiC-Based Converters
… were embedded on the PCB and integrated on the gate driver. High bandwidth switch current sensor measurement is used for fast short-circuit detection and protection of the SiC MOSFET semiconductor switches. Furthermore, comparison with conventional detection and protection method used in …
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Hybrid Modular Multilevel Converter Family and Modular DC Circuit Breaker for Medium-voltage DC (MVDC) Applications
… diodes are passive devices that do not require gate driver units, the HMMR design becomes simpler, resulting in cost and volume savings. Additionally, voltage sharing among the HV diode stack becomes more manageable as concerns regarding gate signal mismatch are eliminated. However, it is …
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Gating Methods for High-Voltage Silicon Carbide Power MOSFETs
… power devices, and to compare the potential gate drive methods for these devices which address those challenges. SiC power devices present many benefits that make them suitable for next generation automotive, power utility grid, and energy management applications. High efficiency, increased …
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