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 28 for “"Power MOSFETs"”.
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Resonant Gate Drive Techniques for Power MOSFETs
… circuits, loss mechanism in conventional power MOSFET (Metal-Oxide-Semiconductor 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 …
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Gating Methods for High-Voltage Silicon Carbide Power MOSFETs
… associated with driving Silicon Carbide (SiC) 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 …
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Time domain device modeling of High Frequency Power MOSFETs
The development of the High Frequency Power MOSFET has brought about a need for accurate models. Now that the frequency range of these MOSFETs is in domains where typically scattering parameter measurements are used, a broad band device model can prove to be extremely useful. This thesis summarizes …
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Third Quadrant Operation of 1.2-10 kV SiC Power MOSFETs
… (3rd-quad) conduction (or reverse conduction) of power transistors is critical for synchronous power converters. For power metal-oxide-semiconductor field-effect-transistors (MOSFETs), there are two current paths in the 3rd-quad conduction, namely the MOS channel path and the body diode path. It …
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Characterization and Modeling of 4H-SiC Low Voltage MOSFETs and Power MOSFETs
… circuits on SiC has profound applications. SiC power devices have proved their superiority in terms of high temperature operation, faster switching frequencies and larger power densities when compared with Si power devices. The control of SiC power devices however, lies in the hands of low …
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Design and Verification of a High Voltage, Capacitance Voltage Measurement System for Power MOSFETs
… and characterization of silicon carbide (SiC) power MOSFETs. The following study discusses the circuit layout and automation software for a measurement system that can perform CV measurements for all three MOSFET capacitances, CGS, CDS, and CGD. This measurement system can perform low voltage …
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Power Module with Series-connected MOSFETs in Flip-chip Configuration
Power module design is needed for high system performance and reliability, especially in terms of high efficiency and high power density. Low parasitic impedance and thermal management is desired for the lower power loss and device stress. For power module with high efficiency and improved …
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A zero-voltage switching technique for high frequency buck converter ICs
… composed of a helper inductor and two helper power MOSFETs that compliment the switching transition of a conventional synchronous buck converter topology. It is shown in this thesis that by using the described topology, the switching losses of the high-side power MOSFET in a synchronous buck …
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Finite Element Method Modeling Of Advanced Electronic Devices
… on the performance of vertical and lateral power MOSFETs is studied. Vertical MOSFETs in a D2PAK and DirectFET package, and lateral MOSFETs in power IC and flip chip are investigated as the case studies. The impact of various layout patterns and material properties on RDS(on) will provide …
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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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MOSFET Current Source Gate Drivers, Switching Loss Modeling and Frequency Dithering Control for MHz Switching Frequency DC-DC Converters
The power density of a switching converter is dependent on the size of the power circuit components. Converters are operated in the hundreds of kHz to achieve high power density since the size of the converter reactive components decrease as frequency increases. Most present day low power (<200W) …
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Switching Trajectory Control for High Voltage Silicon Carbide Power Devices with Novel Active Gate Drivers
… (SiC) semiconductor devices is increasing in the power industry due to their lower parasitics, higher blocking voltage, and higher thermal conductivity over their silicon (Si) counterparts. Applications of high voltage SiC power devices, generally 10 kV or higher, can significantly reduce the …
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DEVELOPMENT AND IN-SITU CHARACTERIZATION OF BI-LAYERED LAMINATED COMPOSITES FOR ENHANCED MOISTURE BARRIER PERFORMANCE
… analysis was performed on two different GaN power MOSFETs by the application of different underfill and potting encapsulations to determine stresses and strains on the solder bumps.
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Comparative Study of Power Semiconductor Devices in a Multilevel Cascaded H-Bridge Inverter
… battery energy storage system (BESS) using SiC power MOSFETs and Si IGBTs. Two crucial performance drivers for inverter applications are power loss and efficiency. Both of these are investigated in this thesis. Power devices with similar voltage and current ratings are used in the same inverter …
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Cascade Dual-Buck Inverters for Renewable Energy and Distributed Generation
… cells. The renewable energy sources need the power electronics interface to the utility grid because of different characteristics between the sources and the grid. No matter what renewable energy source is utilized, inverters are essential in the microgrid system. Thanks to flexible modular …
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Electrical Design Considerations and Packaging of Power Electronic Modules
<p>A modern power electronic module can save significant energy usage in the power electronic systems by improving their switching efficiencies. One way to improve the efficiency of the power electronic module is to reduce its parasitic circuit elements. The purpose of this thesis is to investigate …
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Investigation of Power Semiconductor Devices for High Frequency High Density Power Converters
The next generation of power converters not only must meet the characteristics demanded by the load, but also has to meet some specific requirements like limited space and high ambient temperature etc. This needs the power converter to achieve high power density and high temperature operation. It …
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RF Models for Active IPEMs
Exploring RF models for an integrated power electronics module (IPEM) is crucial to analyzing and predicting its EMI performance. This thesis deals with the parasitics extraction approach for an active IPEM in a frequency range of 1MHz through 30MHz. Based on the classic electromagnetic field …
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Design and Validation of a High-Density 10 kV Silicon Carbide MOSFET Power Module with Reduced Electric Field Strength and Integrated Common-Mode Screen
… and usage trends are changing. Hence, the power electronics that control the flow and conversion of electrical energy are an important research area. Advanced power electronics with improved efficiency, power density, reliability, and functionality are critical in data center, …
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Modelling and enhancement of the channel mobility of 4H-SiC power MOS devices
… as a semiconductor material for various power electronics applications. In particular, SiC power MOSFETs have turned into a serious competitor to more conventional Si unipolar and bipolar power devices across a wide range of voltage ratings. Nonetheless, the widespread adoption of these …
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