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 19 of 19 for “"Magnetic Design"”.
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Design and analysis of a permanent magnet generator for naval applications
This paper discusses the electrical and magnetic design and analysis of a permanent magnet generation module for naval applications. Numerous design issues are addressed and several issues are raised about the potential improvements a PM generation system can offer. A proposed 16 MW PM generation …
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Design Methodology for an Ultra-High Efficiency Coreless Resonant Power Transformer
… In order to achieve ultra-high efficiency designs, several advanced conductor topologies are explored with the development of corresponding experimentally validated modeling techniques to capture extra losses due to non-ideal conductor construction and elliptically rotational magnetic …
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High Frequency, High Current 3D Integrated Point-of-Load Module
… firstly explores the LTCC inductor substrate design in the multi-MHz range for a high-current POL module with GaN devices. The impacts of different frequencies and different LTCC ferrite materials on the inductor are also discussed. Thanks to the DC flux cancellation effect, the inverse …
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Investigation of Topology and Integration for Multi-Element Resonant Converters
… current applications. Those issues include magnetic design, start-up, short-circuit protection, synchronous rectifier drive, EMI noise and integration, etc. To solve those issues, like start-up and short-circuit protection, SR driving and EMI, etc., a synthesis method is proposed to find the …
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High Frequency, High Current Integrated Magnetics Design and Analysis
… efficiency over the state of the art industry design and also increased the switching frequency for capacitor reduction. The goal of this research was to study this topology and improve the magnetic design to decrease the cost while maintaining the superior performance. The magnetics used in …
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Comparison of interior permanent magnet synchronous machines for a high-speed application
… This dissertation discusses the electrical and magnetic design of permanent magnet machines and the design and analysis of two 10 kW, 30000 rpm Interior Permanent Magnet (IPM) machines. This dissertation consists of two parts: the first part discusses high-speed machine topologies, and in …
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Design and Integration Techniques for High-Frequency PCB-Based Magnetics in Resonant Converters
… increase in operating frequency, complicated magnetic components can be broken down into a cellular structure, each with a few number of turns. They can be easily implemented using 4-6 layers of PCB windings. Moreover, integrating the cellular cores using flux cancellation can further improve …
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Magnetically suspended reaction sphere with one-axis hysteresis drive
This thesis presents the design, modeling, implementation, and control of a magnetically suspended reaction sphere with one-axis hysteresis drive (1D-MSRS). The goal of this project is two fold: (a) exploring the design for a reaction sphere in 3D for spacecraft's attitude control, and (b) studying …
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Control of Pseudo-Sinusoidal Switched Reluctance Motor with Zero Torque Ripple and Damped Input Current Ripple
… to give a smooth torque. One is to improve the magnetic design, the other is to use sophisticated control techniques. Some torque control techniques have been proved to obtain a relatively good performance by simulations and experimental results. This thesis gives an alternative torque ripple …
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Topology investigation of front end DC/DC converter for distributed power system
… fame of low switching loss. Unfortunately, to design with hold up requirement, none of them could provide significant improvements over PWM converter. Although the negative outcome, the desired characteristic for front end application could be derived. Base on the desired characteristic, a …
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Linear magnetron high deposition rate magnet pack for high power impulse magnetron sputtering
… main issue that is addressed by the author. The magnetic field strength, shape, and inclination on the target surface all effect the sputtering yield of the magnetron [6]. Previous studies by Raman et. al [7,8] have shown that a complex magnetic field topology allows for an increased deposition …
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Modeling and Mitigation of EMI from Near-Field Coupling Effects in Front-End Power Supplies
… remain which complicate high-density converter design. Electronic products are required to meet certain electromagnetic compatability (EMC) standards, yet EMC is often not addressed until late in the design cycle through trial-and-error methods. Even when EMC is considered earlier, models can …
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Magnet design considerations for superconductive magnetic energy storage
Superconducting Magnetic Energy Storage (SMES) offers many advantages over conventional forms of energy storage. The higher unit costs of SMES make it economically feasible only for large-scale applications (5000 MWh or more). Early studies showed that low aspect ratio solenoids have the lowest …
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Integrated magnetic components for high-power high-current dc-dc converters
This thesis is focused on the design and development of an integrated magnetic (IM) structure for use in high-power high-current power converters employed in renewable energy applications. These applications require low-cost, high efficiency and high-power density magnetic components and the use of …
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Packaging of a High Power Density Point of Load Converter
… fundamentally change the way these inductors are designed. This work will explore the use of low temperature co-fired ceramic (LTCC) tapes in the magnetic design to allow a low profile planar inductor to be used as a substrate. LTCC tapes have excellent properties in the 1-10 MHz range that allow …
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Optimization of LLC Resonant Converters: State-trajectory Control and PCB based Magnetics
… power supply normally consists of electromagnetic interference (EMI) filter, power factor correction (PFC) circuit and isolated DC/DC converter. Isolated DC/DC converter occupies more than half of the volume in an off-line power supply and takes the most control responsibilities, so …
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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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PCB-Based Heterogeneous Integration of LLC Converters
… of an off-line power supply include an electromagnetic interference (EMI) filter, a power factor correction (PFC) circuit, and an isolated DC-DC converter. For off-line power supply, an isolated DC-DC converter offers isolation and output voltage adjustment. For an off-line power supply, it …
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High-frequency Power Conversion for Medium Voltage Power Electronics Interfaces
… a reduction in the cross-sectional area of the magnetic components, leading to a smaller and lighter design. However, the high-frequency transformer used in the solid-state transformer does face certain limitations. Balancing insulation capability with the goal of achieving high power density …