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.
Results
Showing 1 to 20 of 30 for “"Electrical Isolation"”.
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Low power-electrical isolation for EKG monitoring equipment
… Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1979.
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The effects of non-uniform illumination on the performance of series connected photovoltaic arrays
… of generating electricity in regions where electrical isolation is required. Using Series Connected Photovoltaic Arrays (SCPA) for voltage conversion has the advantage in that high voltage can be directly generated in a small volume. These advantages have led to applications in which the …
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Development of Colloid Displacement Lithography Platforms for Sensor Applications
… However, for actual sensor applications, electrical isolation of individual sensor sections must be achieved. This is attempted by laying down a 40 μm stripe of PDDA on a cleaned substrate and coating that stripe with gold colloid. The size of 40 μm or less in width is set as the target to …
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Electrochromism of Transition Metal Phthalocyanine Thin Films
… charge-consuming ability, apparently related to electrical isolation of small domains, perhaps grains. The oxidations and rereductions are electrochromic, and the various color changes are described.
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Design of a high performance liquid-cooled lithium-ion battery pack for automotive applications
… high thermal conductivity while maintaining electrical isolation. Cold plate design, sealing, and manufacturing is discussed and implemented concluding with pressure and leak testing of a scale test article. Cell soldering efficacy is explored through testing of various low temperature solder …
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Active-clamp PWM converters: design-oriented analysis and small-signal characterization
… circuit in high-frequency PWM converters with an electrical isolation. Existing design guidelines and design trade-offs for the ACL in forward and flyback converters are reviewed, and specific properties of both circuits that are caused by the ACL are highlighted. Based on the obtained results, a …
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Extrinsic Fabry-Perot Interferometric hydrogen gas sensor
… are impractical for many applications requiring electrical isolation or operation in the presence of strong electromagnetic fields. Materials can be sputter deposited along cylindrical optical fiber-based sensors to create novel fiber-optic chemical sensors. Herein, the mechanisms allowing the …
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Left Atrial Posterior Wall Isolation in the Treatment of Atrial Fibrillation
… is undefined. Left atrial posterior wall isolation (LAPWI) is a promising lesion set, based on techniques for surgical AF ablation. The left atrial posterior wall can be isolated via catheter, surgical or hybrid ablation techniques. This MD thesis aims to inform a comparative trial of …
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Ion-beam processes in group-III nitrides
… on structural, mechanical, optical, and electrical properties of these materials. ¶ ... ¶ The work presented in this thesis has resulted in the identification and understanding of a number of both fundamental and technologically important ion-beam processes in III-nitrides. Most of the …
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Ion-beam processes in group-III nitrides
… on structural, mechanical, optical, and electrical properties of these materials. ¶ ... ¶ The work presented in this thesis has resulted in the identification and understanding of a number of both fundamental and technologically important ion-beam processes in III-nitrides. Most of the …
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Design of a Bimodal Chemical-Electrospray Propulsion System using Ionic Liquid Monopropellants
… conditioning of the propellant and 2) ensuring electrical isolation between the thrusters and propellant line during firing. A prototype propellant line was fabricated to test the system and proved that the design sufficiently addresses the technical objectives. This successfully validates the …
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Design and fabrication of vertical external cavity surface-emitting lasers
… mirrors, to examine the tradeoff in their electrical and optical properties. This tradeoff is integral to both the VCSEL and VECSEL designs. A simulation of the VCSEL devices is performed and compared to experimental characterization. Based on these results, VECSEL devices are then designed …
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Design and manufacturing of an ion electrospray propulsion system package and passively-fed propellant supply
… in close, precise proximity and maintained electrical isolation between high voltage electrodes. Additionally, the package provided for structural and electrical attachment interfaces for the PPU and propellant supply. Design rationale is presented and iterative improvements described for …
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Multiphase Isolated DC-DC Converters for Low-Voltage High-Power Fuel Cell Applications
… Thirdly, use of a transformer provides electrical isolation and a high conversion ratio. Lastly, several multiphase converters are capable of soft-switching operation, which increases converter efficiency. This thesis examines two highly efficient, soft-switching dc-dc converters that …
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On a dual wavelength optical sensor system for measuring strain and temperature simultaneously in tokamak port plug
… devices. This thesis demonstrates that using electrical sensors in the supporting structures of a fusion reactor for measuring strain and temperature will be strongly affected by the ionising radiation and the electromagnetic fields. This is because it was found that errors of over 100% can be …
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Compact power conditioning and RF systems for a high power RF source
… inductive energy storage, voltage step-up, and electrical isolation. The exploding wire fuse was implemented as an opening switch to transfer energy to the RF circuit, and extensive modeling of the dynamic fuse resistance was performed. The crowbar switch prevented stray circuit or generator …
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Development and analysis of high-frequency, high-density PFC power conversion
… and regulation stage which also provides electrical isolation between the ac input and dc output. The thesis also explores the use of available conventional high-density telecom "brick" converters as a second stage. In conclusion, the project explores the possibility of using a buck …
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MEMS relays for make-break power switching applications : {111} silicon etched planar electrical contacts
… switches, mechanical relays provide galvanic isolation across the power ports. This characteristic is important because, for safety reasons, electrical codes stipulate that loads in certain power applications must be disconnected by open gaps. This requirement imposes significant isolation, …
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BULK TITANIUM WAVEGUIDE- A NEW PLATFORM FOR UNIPLANAR MICROWAVE CIRCUITS AND RFMEMS
… capabilities. The high aspect ratio in-plane electrical isolation also serves as through-wafer interconnects with a high packing density. When integrated with a bulk titanium package, this waveguide provides a robust, compact, packaging solution for microwave subsystems as well as other …
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Evaluation of a Heat Flux Microsensor in a Transonic Turbine Cascade
… and rule out the anodization layer (used for electrical isolation of the directly deposited gage from the blade) as the cause for the directly deposited gage's much slower time response. Offsets of ± 0.254 mm (0.010") at the gage location with an estimated boundary layer thickness of 0.10 mm …
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