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 “"transformer performance"”.
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Multi-objective optimization and meta-modeling of tape-wound transformers
… presented herein, design models of tape-wound transformers to support component and system-level optimization are considered. As a basis for component optimization, a magnetic equivalent circuit (MEC) model is derived. The key components of the MEC model are the leakage permeances, which have …
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Measurements and modeling of moisture diffusion processes in transformer insulation using interdigital dielectrometry sensors
The presence of moisture in a transformer deteriorates the transformer insulation by decreasing its electrical, mechanical, and thermal strength. Therefore, it is important to monitor the moisture condition in both liquid and solid insulation to assure transformer performance. There are …
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Design of High-Power High-Frequency Coreless Transformer Systems
… advances in the design of coreless power transformers as well as associated power electronics, which can also add extra functionality. Compared to traditional core-based transformers that require large, heavy and costly magnetic cores to guide magnetic flux between windings, the coreless …
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Moisture and temperature effects on the dielectric spectrum of transformer insualtion materials
The presence of moisture in a transformer deteriorates the transformer insulation by decreasing its electrical, mechanical, and thermal strength. Therefore it is of great importance to monitor the moisture condition in both liquid and solid insulation to assure transformer performance. There are …
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Miniaturization of on-chip passive electronic devices by silicon nitride self-rolled-up membrane microtube nanotechnology
… is highly desirable to enhance the density, performance and functionality of integrated circuits (ICs) working from DC to millimeter wave frequency band. Numerous improvement methods have been demonstrated but all fail to fundamentally solve the intrinsic drawbacks of currently used planar …
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High Frequency, High Power Density Integrated Point of Load and Bus Converters
… propose methods to improve the power density and performance of point of load modules ranging from 10 to 600W. For non-isolated, low current point of load applications targeting outputs ranging from one to ten ampere, the use of a three level converter is proposed to improve efficiency and power …
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High Frequency LTCC based Planar Transformer
… to fabricate them. The planar magnetic is a transformer or an inductor that replaces the wire-wound transformer or inductors which generally uses copper wires. One of the main reasons why we move to planar magnetic technology is its operation at higher frequency which provides higher power …
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Topology and Control Investigation of Soft-Switching DC-DC Converters for DC Transformer (DCX) Applications
… data center power supplies, and solid-state transformer (SST) systems, the fixed-ratio isolated DC-DC converter, namely the DC transformer (DCX), has gained significant popularity. Similar to the passive AC transformer, DCX can bidirectionally convey DC power with very high efficiency. Due to …