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 8 of 8 for “"field-grading"”.
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A longitudinal analysis of college-wide and major field grading standards
… arts college. Specifically, the changes in grading standards between major fields and across time periods were examined against the model of Adaptation-Level grading. (The Adaptation-Level grading theory hypothesizes a positive relationship between ability levels and grading standards.) …
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Field-Grading in Medium-Voltage Power Modules Using a Nonlinear Resistive Polymer Nanocomposite Coating
… a nonlinear resistive polymer nanocomposite field-grading coating to enhance insulation performance without compromising thermal performance for medium-voltage power modules. The studied polymer nanocomposite is a mutual effort of this research and NBE Technologies. Instead of using …
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Nonlinear Polymer Nanocomposite for Field Grading in Medium-Voltage Power Converters under High-Altitude and Humid Environments
… boards (PCBs) at high altitudes. Electric field simulations of the triple-point (TP) region revealed strong E-field intensification at conductor-ceramic-silicone and conductor-FR4-air interfaces, leading to premature partial discharges and breakdown. To mitigate these effects, a PNC coating …
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Bayesian Optimization of PCB-Embedded Electric-Field Grading Geometries for a 10 kV SiC MOSFET Power Module
… technique is used to design electric field grading structures in a PCB-integrated bus bar for a 10 kV bondwire-less silicon-carbide (SiC) MOSFET power module. Due to the ultra-high-density of the power module, careful design of field-grading structures inside the bus bar is required to …
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Electric Field Grading and Electrical Insulation Design for High Voltage, High Power Density Wide Bandgap Power Modules
… increase. This leads to extremely high electric field stress, E, of extremely nonuniform type within the module, leading to a higher possibility of "partial discharge (PD)" and, in turn, insulation degradation and, eventually, breakdown of the module. Unless the discussed high E issue is …
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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
… MOSFETs that addresses the enhanced electric fields, greater electromagnetic interference, worsened dynamic imbalance, and higher heat flux issues associated with the packaging of these unique devices. Specifically, due to the low and balanced parasitic inductances, the power module prototype …
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Insulation Design and Analysis for Medium-Voltage SiC-based Power Electronics Building Blocks
… detailed. Key considerations, including electric field (E-field) grading near power terminals and PCB edges, cable feedthroughs, and the integration of components, are explored from the perspective of E-field management. A design example of a 3-level dc bus for a 6 kV-1 MW Power Electronics …
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PU elastomers and grafted GO/PU nanocomposite with self-healing and self-adapting capabilities for next-generation electrical insulation
… In order to solve the problem of local electric field distortion and electrical damage of insulating materials in high-voltage electrical equipment, the development of a dielectric material with simultaneous self-healing and self-adaptive electrical properties is an enabling material to achieve …