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 47 for “"gate drive"”.
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Resonant Gate Drive Techniques for Power MOSFETs
… Field-Effect Transistor) gate drive circuits is analyzed. Resonant gate drive techniques are investigated and a new resonant gate drive circuit is presented. The presented circuit adds minor complexity to conventional gate drivers but reduces the MOSFET gate drive loss very …
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Equivalent Modeling of Medium-Voltage Gate Drive Circuitry
… can induce significant current through the gate-to-drain capacitor, causing disturbance voltages across the gate-to-source nodes. The gate-to-source voltage controls whether the device turns on or off, and the disturbance voltages can be severe enough to cause shoot through or even cause the …
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Current-Transformer Based Gate-Drive Power Supply With Reinforced Isolation
… high blocking voltage bring challenges to the gate-drive circuit design. The gate driver of SiC-MOSFETs requires a power supply that provides a high-voltage, high-density design, a low input-output capacitance (CI/O) transformer design, good voltage regulation, as well as good resilience to …
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Four-Output Isolated Power Supply for the Application of IGBT Gate Drive
This thesis focuses on the design issues of the multiple-output boost full-bridge converter, which is constructed by cascading the boost regulator with the inductor-less full-bridge converter. The design of the boost regulator has been proposed briefly with component selection and compensator …
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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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PCB-Based 1.2 kV SiC MOSFET Packages for High Power Density Electric Vehicle On-Board Chargers
… Replacing the incumbent silicon insulated gate bipolar transistors with silicon carbide (SiC) metal oxide semiconductor field effect transistors (MOSFETs) has been proposed as a solution to increase the power densities of power converters in some applications. One such application is …
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MOS-bipolar composite power switching devices
… capabilities, fast switching speeds, simple gate drive requirements, savings in chip area, reverse bias second breakdown ruggedness and large safe operating areas. Application characteristics of the devices for high frequency power inverter circuits are discussed. Monolithic integration of …
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Package-scale galvanically isolated systems for data transfer [Sistemi di isolamento galvanico package-scale per trasferimento dati]
… di controllo in tecnologia GaN per applicazioni gate-drive. Il collegamento isolato è stato fabbricato e caratterizzato mostrando un basso consumo di potenza pur mantenendo prestazioni allo stato dell’arte.
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Insulated gate transistors: characteristics and application to motor control
… conditions of temperature, rate of rise of gate-source voltage and rate of fall of drain-source voltage. A 340V, lOA three phase GEMFET bridge inverter using a pulse width modulation scheme to drive a permanent magnet brushless dc motor was successfully fabricated. The simplicity of the gate …
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High power wide bandgap cascode switching circuits
… are now available, but all exhibit undesirable gate drive characteristics. The cascode circuit has been suggested as a solution to this problem: WBG cascodes improve the switching speed, gate characteristics and noise immunity of devices, at the expense of greater on-state resistance. WBG …
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Design of a high-efficiency, high-performance zero-voltage-switched battery charger-discharger for the NASA EOS space platform
… overvoltage protection, soft starting, reliable gate drive circuitry, high efficiency, and good dynamics is demonstrated. The ZVS-BBCD is compared to separate hard-switched multimodule charge and discharge units in weight and efficiency and is found to be significantly lighter with comparable …
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High Frequency Isolated Power Conversion from Medium Voltage AC to Low Voltage DC
… discharge test. 500 kHz 15 kW CLLC converter gate drive is our design challenge in terms of symmetry propagation delay, cross talk phenomenon elimination and shoot through protection. Gate drive IC is carefully selected to achieve symmetrical propagation delay and high common mode dv/dt …
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Lifetime Assessment and Real-Time Reliability Evaluation of SIC MOSFETs in Power Converters
… which dynamically adjusts switching frequency, gate-drive voltage, and cooling to balance performance and lifetime. Experimental validation demonstrates significant lifetime improvements compared to conventional control. The developed modeling, testing, and control methodologies collectively …
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Radio frequency dc-dc converters : device characterization, topology evaluation, and design
… power conversion. The design issues were investigated for a 200 W 160-200 V input 33 V output converter. A comparison of resonant inverter topologies for the power stage was made. Appropriate devices were sought, compared, and characterized. A high frequency gate drive scheme for a large vertical …
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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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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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A zero-voltage switching technique for high frequency buck converter ICs
… helper circuit could be used to reduce the gate drive losses for both power MOSFETs in a synchronous buck converter by up to 60%. Since the method requires the use of an additional helper inductor with a small value (10-50 nH), various methods to integrate this inductor into an IC package …
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Design and evaluation of a very high frequency dc/dc converter
… output voltage range. In addition, a resonant gate drive scheme suitable for VHF operation is presented, which provides rapid startup and low-loss operation. The converter regulates the output using high-bandwidth on-off hysteretic control, which enables fast transient response and efficient …
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Wide Bandwidth Control Electronics For Gan-Based Pebbs
… semiconductor materials (such as GaN) has been driven by the unique properties of these materials, such as high electron mobility, high saturation velocity, high sheet-carrier concentration at hetero-junction interfaces, high breakdown voltages, etc. These properties make the use of III-Nitride …
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