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 418 for “"power conversion"”.
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Radio frequency dc-dc power conversion
… architectures and circuit topologies for dc-dc power conversion at very high frequencies. The systems architectures that are developed are structured to overcome limitations associated with conventional designs. In particular, the new architectures described here structure the energy processing …
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Enabling miniaturized grid-interface power conversion
… to a single application system: a grid-interface power converter. These kinds of converters have several unique aspects that make them good targets for research, including a heavy reliance on magnetic components, relatively high voltages for application of emerging GaN transistors, wide range of …
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Load-Independent Class-E Power Conversion
… topology was presented as a single-switch power amplifier with high efficiency at the optimum condition, where the switch enjoys zero-voltage switching (ZVS) and zero-voltage-derivative switching (ZDS). It is also used in MHz dc-dc converters, and in inverters for wireless power transfer, …
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Class-E Current Source Power Conversion
Current source is used in auxiliary power supplies, battery chargers, and LED drivers. The battery chargers are required to provide constant current within a wide output voltage range, similar to LED drivers. The load-independent (LI) Class-E inverter is a promising topology for such applications …
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Techniques for integrated energy-efficient power conversion
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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Techniques for efficient radio frequency power conversion
A diverse range of radio-frequency (RF) power applications demand RF power generation systems that allow for dynamic output power control while having the capability to efficiently deliver power into a varying load. While some of these existing and emerging applications are characterized with …
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Multi-resonant passive components for power conversion
… and size-scaling limits of passive components. Power inductors and transformers, in particular, are challenging to miniaturize because of their poor performance when scaled down in size, and the difficulty of fabricating them with available planar processes. A family of approximating networks …
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Parity simulation of static power conversion systems.
Thesis: Elec. E., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1978
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Weight Estimation of Electronic Power Conversion Systems
Electronic power conversion systems with large number of power converters have a variety of applications, such as data center, electric vehicles and future smart "nanogrid" in residential home. Those systems could have very different architectures. For example, one system could be based on ac, dc …
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High-frequency multi-resonant power conversion techniques
… technique, a novel concept in dc/dc power conversion, is proposed. The essence of the multi-resonant power conversion is the effective utilization of the major parasitic reactive components of the power stage, including the leakage inductance of the power transformer, output …
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High frequency power conversion architecture for grid interface
… strained by the performance requirements on power electronic circuits. In this thesis, a design technique for high-performance ac-dc power converters will be presented. A new grid interface ac-dc conversion architecture and associated circuit implementations are proposed along with novel …
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Adaptable power conversion for grid and microgrid applications
Power electronics convert and control power and are an essential part of many electronic devices and systems. Increasingly, power converters need to operate over widely varying operating conditions (voltage, current and power level), which can degrade their performance. In many applications, power …
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Evaluating Nuclear Energy Power Conversion Cycles for Microreactors
… along with the efficiency of three simple power conversion cycles. Printed circuit heat exchangers with semi-circular channels were used in analysis due to their high power densities and low costs, making them extremely suitable for use with microreactors. A stepwise linear solver was …
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Radio frequency rectifiers for DC-DC power conversion
A significant factor driving the development of power conversion technology is the need to increase performance while reducing size and improving efficiency. In addition, there is a desire to increase the level of integration of DC-DC converters in order to take advantage of the cost and other …
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Topology and analysis in power conversion and inversion
Basic PWM dc-to-dc converter structure is examined wherein a basic substructure of converters, known as a converter cell, is identified. Converter cells can be used in generation and classification of basic PWM dc-to-dc converters. A large number of new converters are generated. Converter analysis, …
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Control strategies for supercritical carbon dioxide power conversion systems
… recompression cycle is a promising advanced power conversion cycle which couples well to numerous advanced nuclear reactor designs. This thesis investigates the dynamic simulation of, control strategies for, and selected transient results for an indirect S-CO2 recompression cycle. The cycle …
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Solar thermoelectric power conversion : materials characterization to device demonstration
… photovoltaic solar cells and concentrated solar power are considered to be the most promising approaches. Solar cells directly convert sunlight into electricity by photon induced electron-hole pair generation. Concentrated solar power captures the sunlight in form of heat which is then converted …
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Large-Signal Characterization of Piezoelectric Resonators for Power Conversion
Magnetics are key components of conventional power converters, but they are often the bottleneck to achieving high power density due to their size, weight, and poor performance at small sizes. Piezoelectric devices, when operated in their inductive regime, can serve a purpose similar to that of …
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Designs for ultra-high efficiency grid-connected power conversion
Grid connected power conversion is an absolutely critical component of many established and developing industries, such as information technology, telecommunications, renewable power generation (e.g. photovoltaic and wind), even down to consumer electronics. There is an ever present demand to …
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