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 11 of 11 for “"Insulation Design"”.
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Insulation Design and Analysis for Medium-Voltage SiC-based Power Electronics Building Blocks
In this dissertation, a design approach for medium voltage (MV) PCB-based components, such as the dc bus, is 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 …
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Insulation Design, Assessment and Monitoring Methods to Eliminate Partial Discharge in SiC-based Medium Voltage Converters
… order to achieve the desired high power density, insulation system of the MV SiC-based converter must be compact. Therefore, challenges for the insulation system gradually appeared, as the insulation size becomes smaller and the Electric field (E-field) intensity significantly increases. Under …
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Electric Field Grading and Electrical Insulation Design for High Voltage, High Power Density Wide Bandgap Power Modules
… of "partial discharge (PD)" and, in turn, insulation degradation and, eventually, breakdown of the module. Unless the discussed high E issue is satisfactorily addressed and solved, realizing next-generation high power density WBG power modules that can properly operate will not be possible. …
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Design of universal insulation systems for low voltage and high voltage rotating electrical apparatus
… and generators, has historically required the design and specification of electrical insulation systems optimized based on operating voltage. This apparatus specific design approach, while effective, necessitates a variety of electrical insulation system topologies and material choices. It is …
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Insulation-Constrained Design of Power Electronics Converters and DC Circuit Breakers
… of such PD events gradually degrades the insulation system of the equipment, reducing its lifetime and ultimately leading to total insulation failure. Therefore, inception E-field based insulation design guidelines are developed to help achieve zero-PD operation of power electronics …
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Design of a 405/430 kHz, 100 kW Transformer with Medium Voltage Insulation Sheets
… transformer. The objective of this work is to design a >400 kHz, 100 kW transformer which will provide galvanic isolation in a Solid-State Transformer (SST) based PEBBs while maintaining high efficiency, high power density, and reduced size. This work aims to present a simplified design process …
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Toward high efficiency radioisotope thermophotovoltaic system by spectral control
This thesis describes the design, modeling, and measurement results of a radioisotope thermophotovoltaic system (RTPV) using a two-dimensional photonic crystal emitter and low bandgap thermophotovoltaic (TPV) cell to realize spectral control. The RTPV generator aims to use the decay heat released …
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Performance standards for walk-in coolers and freezers in the United States as a function of local weather conditions
… door closers, strip curtains, suction line insulation, optimized envelope insulation design, high efficiency lighting, hot gas defrost, evaporator fan controllers, etc. However, minimum efficiency standards for walk-in coolers and freezers have not yet been developed. Development of …
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Failure Modes Analysis and Protection Design of a 7-level 22 kV DC 13.8 kV AC 1.1 MW Flying Capacitor Converter Based on 10 kV SiC MOSFET
… SiC MOSFET with 2.5 kHz switching frequency was designed and constructed. Given the complexity of a multilevel topology, the high voltage levels, and the critical nature of the loads, a failure in a high-power converter can incur significant costs, long service downtime, and safety risks to …
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Integration Challenges In High Power Density Wide Bandgap Based Circuits for Transportation Applications
… This requirement results in a very limited design region of acceptance, making the converter hard to handle uncertainties. However, the integration process might bring large uncertainties, such as material property changes. This phenomenon can degrade converter performance or even cause …
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Hybrid Modular Multilevel Converter Family and Modular DC Circuit Breaker for Medium-voltage DC (MVDC) Applications
… 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 important to note that diodes lack …