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 303 for “"Single-Stage"”.
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Uncertainty Estimation for Single Stage Object Detection
While deep neural networks deliver state-of-the-art performance in object detection, their inherent tendency toward overconfidence compromises their reliability in safety-critical applications, necessitating robust methods for uncertainty quantification. Although full Bayesian inference would …
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Development of a single-stage nano indenter
… work seeks to understand the functionality of a single degree-of-freedom stage in a MEMS (Micro-Electromechanical system) platform that enables very precise displacement as well as force control. This type of stage finds use in determining fluid properties such as viscosity; to determine the …
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Advanced Single-Stage Power Factor Correction Techniques
Five new single-stage power factor correction (PFC) techniques are developed for single-phase applications. These converters are: Integrated single-stage PFC converters, voltage source charge pump power factor correction (VS-CPPFC) converters, current source CPPFC converters, combined voltage …
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Advanced Integrated Single-Stage Power Factor Correction Techniques
… innovative solutions of the advanced integrated single-stage power-factor-correction (S2PFC) techniques, which target at the low- to medium-level power supplies, for wide range of applications, from power adapters and computers to various communication equipment. To limit the undesirable power …
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Solar-based Single-stage High-efficiency Grid-connected Inverter
… Traditional solar-based inverter system is two stages in cascaded, which has a simpler controller but low efficiency. A new solar-based single-stage grid-connected inverter system can achieve higher efficiency by reducing the power semiconductor switching loss and output stable and synchronized …
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A single stage power factor corrected AC/DC converter
… has been traditionally implemented by two power stages. In order to provide a cost effective and high density solution for low power applications, this thesis proposes a single stage isolated converter topology designed to achieve a regulated dc output voltage having no low frequency components …
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Single stage boost inverter for standalone fuel cell applications
… dc-ac converter is based on a transformerless single stage power conversion scheme, which has better weight, volume and efficiency than the commonly used two stage power conversion schemes. The selected topology is the boost inverter that consists of two identical boost converters for boosting …
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Forced vibrations of a single stage axial compressor rotor.
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 1978
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Single-Stage Grid-Connected Multilevel Converters: Topologies and Control Strategies
… of efficient multilevel converters with the single-stage dynamic voltage-boosting feature, reduced number of circuit components, modular structure, and bidirectional operation is presented. The aforementioned advantages make this converter a suitable candidate for renewable energy …
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Study and Improvement of Single-Stage Power Factor Correction Techniques
… work focuses on the study and improvement of single-stage power factor correction techniques. The generalized structures of the present pulse-width-modulation (PWM) integrated single-stage power factor correction (PFC) converters are presented. The typical PFC cells in the single-stage PFC …
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A single stage full bridge power factor corrected AC/DC converter
Conventional single phase AC/DC converters use a two stage power configuration to provide a regulated DC power supply at high input power factor. Elimination of one of these stages can reduce the cost, weight, size, complexity and increase the overall reliability of this converter. This thesis …
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A Single-Stage Passive Vibration Isolation System for Scanning Tunneling Microscopy
… This research aims to analyze and build a single-stage passive VIS for an STM. The VIS consists of a mass-spring system staying inside an aluminum hollow tube. The mass-spring system is comprised of a circular copper stage suspended by a combination of six extension springs, and the STM …
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LLC Resonant Converter Based Single-stage Inverter with Multi-resonant Branches
This paper presents a single-stage inverter with variable frequency modulation (VFM) based on LLC resonant converter. And LLC converter is a common topology of dc/dc conversion. LLC resonant converter can achieve high efficiency and soft-switching performance. Since the dc gain curve of the …
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A Three-Phase Single-Stage AC-DC ZVZCS PWM Full-Bridge Converter
… of the available source power. Conventional two-stage power conversion, however, requires two power con verters and there has been considerable interest to try to integrate the PFC and dc-dc conversion functions in a single power converter to reduce cost and complexity. Although many of these …
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A Three-Phase Single-Stage AC-DC ZVZCS PWM Full-Bridge Converter
… of the available source power. Conventional two-stage power conversion, however, requires two power con verters and there has been considerable interest to try to integrate the PFC and dc-dc conversion functions in a single power converter to reduce cost and complexity. Although many of these …
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Toward CFD-based correlations for a single-stage high-pressure transonic turbine
… the performance characteristics of the turbine stage.
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Efficiency measurements of a single stage turbine in a short duration facility
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
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Single-Stage Wireless Power Transfer System with Single-Switch Secondary Side Modulation
… include incorporating either post-regulator stage, wireless communication from secondary to primary side, primary side sensing and modulation scheme, or dual active bridge type of topology. However, all existing methods have limitations and disadvantages in terms of increased size/cost, …
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High Efficiency Single-stage Grid-tied PV Inverter for Renewable Energy System
A single-phase grid connected transformerless photovoltaic (PV) inverter for residential application is presented. The inverter is derived from a boost cascaded with buck converter along with a line frequency unfolding circuit. Due to its novel operating modes, high efficiency can be achieved …
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Design and Realization of a Single Stage Sigma-Delta ADC With Low Oversampling Ratio
… This dissertation focuses on the design of a single-stage sigma-delta A/D converter with very low oversampling ratio for the wireless application. An architecture for a multibit single-stage delta-sigma A/D converter with two-step quantization is proposed. Both the MSB and LSB signals produced …
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