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 24 for “"transformer design"”.
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A problem in transformer design
Made available in DSpace on 2016-11-09T23:47:24Z (GMT). No. of bitstreams: 2 5998737.pdf: 9063744 bytes, checksum: c0606871b4f7e98a766f846b736309e2 (MD5) license.txt: 4183 bytes, checksum: 1dcc2037833d76bede73d5717587543b (MD5) Previous issue date: 1917
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The effects of separable cores on high power transformer design
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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On-chip Spiral Inductor/transformer Design And Modeling For Rf Applications
Passive components are indispensable in the design and development of microchips for high-frequency applications. Inductors in particular are used frequently in radio frequency (RF) IC's such as low-noise amplifiers and oscillators. High performance inductor has become one of the critical …
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High-Frequency Transformer Design for Solid-State Transformers in Electric Power Distribution Systems
… thesis is to present a high- or medium-frequency transformer design methodology for Solid-State Transformer (SST) applications. SSTs have been proposed as a replacement of the traditional 50/60 Hz transformer in applications demanding high-power density. Moreover, due to the high penetration of …
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Single-phase vs. Three-phase High Power High Frequency Transformers
… single and three-phase high power high frequency transformers in power conversion systems. The objective is to compare the volume of the transformers. And single and three-phase Dual Active Bridge Converter (DAB1 and DAB3) topologies with single and three-phase isolating transformers are selected …
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Current-Transformer Based Gate-Drive Power Supply With Reinforced Isolation
… bring challenges to the gate-drive circuit design. The gate driver of SiC-MOSFETs requires a power supply that provides a high-voltage, high-density design, a low input-output capacitance (CI/O) transformer design, good voltage regulation, as well as good resilience to faults to enable safe …
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Modeling, analysis, and design of a 10 kVA, 20 kHz transformer
The design of a high-frequency transformer at levels above 1 kVA is limited by the winding and core materials which are available. This res~arch presents methods for the design and modeling of a 10 kVA transformer operating at a frequency of 20 kHz using readily available materials. A special …
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Uniform Field Distribution Using Distributed Magnetic Structure
… magnetic component is generally not at a designer's disposal. In a conventional toroidal inductor, the energy density is inversely proportional to the square of the radius. Thus, a designer would be unable to prescribe uniform field distribution to fully utilize the inductor volume for …
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Optimal Design of MHz LLC Converter for 48V Bus Converter Application
… power of the loads. To improve the current design, a GaN (Gallium Nitride) based two-stage solution is proposed for the bus converter. The first stage Buck converter regulates the 40V to 60V variable input to a fixed 36V bus voltage. The second stage LLC converter convert the 36V to 12V by a …
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Design of miniaturized radio-frequency DC-DC power converters
… the magnetic energy storage is accomplished in a transformer that forms an essential part of the resonant network. The reduced component count aids in manufacturability and size, but places difficult requirements on the transformer design. An algorithm for synthesizing small and efficient air-core …
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Design of High-Power High-Frequency Coreless Transformer Systems
This thesis concerns 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, …
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High-frequency Current-transformer Based Auxiliary Power Supply for SiC-based Medium Voltage Converter Systems
… simplicity of the auxiliary power supply system design in the MV converter, partial discharge (PD) free and multi-load driving ability are the additional two factors that need to be addressed in the design. However, today’s state-of-the-art products have either low power rating or bulky designs, …
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Design and Implementation of High Efficiency, High Power Density Front-End Converter for High Voltage Capacitor Charger
… of the active armor system. Furthermore, a design methodology is presented for the front-end converter to achieve the high efficiency as well as the high power density. Design parameters are identified and their impact on the design result is studied. the optimal operating point is …
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Topology Investigation and System Optimization of Resonant Converters
… proposed and analyzed, and an optimal integrated transformer design is proposed, which has low loss and compact size.
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Improvement of Sigma Voltage Regulator - A New Power Architecture
… requirement with relatively low bandwidth design. To attain high efficiency and high power density at the same time, in-series two-stage power architecture was proposed. By cutting the single stage into two and utilizing the low voltage devices, the in-series two stages can achieve around …
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High Frequency Magnetic Core Loss Study
The core used to build power inductors and transformers are soft magnetic materials. When there is alternating external field, the magnetic moments rotate and consume energy, which is the core loss. The core loss depends on the AC flux frequency, amplitude, waveform, DC bias and temperature. These …
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High Frequency, High Power Density Integrated Point of Load and Bus Converters
… modular building blocks replace individually designed specialty power supplies, providing instead an optimized complete solution. To meet the demands for lower loss and higher power density, higher efficiency and higher frequency must be targeted in future designs. The objective of this …
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Optimization of LLC Resonant Converters: State-trajectory Control and PCB based Magnetics
… in the near future. It is very challenging to design isolated DC/DC converters for datacenters since they are required to provide low-voltage high-current output and fast transient response. The LLC resonant converters have been widely used as the DC-DC converter in off-line power supplies and …
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Power Architectures and Design for Next Generation Microprocessors
… 48V VRM in the vicinity of the CPU needs to be designed with very high efficiency, high power density, high light-load efficiency, as well as meet all transient requirements by the CPU and GPU. Transferring the well-developed multi-phase buck converter used in the 12V VRM to the 48V distribution …
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Design and Integration Techniques for High-Frequency PCB-Based Magnetics in Resonant Converters
… PCB windings feature less leakage between transformer windings because of the flexibility of the winding interleaving and the reduced number of turns. There is better thermal management due to the increased surface-to-body ratio. The design has a low profile and high-power density. However, …
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