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 10 of 10 for “"passive filters"”.
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Automating data aggregation for collaborative filtering in Ruby on Rails
… a website's users to provide catered content. Passive filters are one subset of such algorithms that utilize data about a user's interactions with a website in viewing content, purchasing items, etc. My work develops a set of extensions for Ruby on Rails that, when inserted into an existing …
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COMMON MODE VOLTAGE ELIMINATION IN THREE-PHASE FOUR-LEG INVERTERS UTILIZING PULSE DENSITY MODULATION
… Typically, CM EMI reduction is achieved through passive measures such as CM chokes and passive filters. This thesis research explores removing the need for these passive devices in three-phase, four-leg grid-following inverters by eliminating CM EMI using pulse density modulation (PDM) in …
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Design of Miniaturized On-Chip Passive Circuits in Silicon-Based Technology for 5G Communications
… In this thesis, design of miniaturized on-chip passive filters in silicon-based technology will be presented. Both band-stop filters and band-pass filters are implemented and charactierised at mm-wave frequency region. Three unique design approaches are presented.
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Simulation of voltage source converter based shunt active filter in EMTP‐RV
… in transmission and distribution systems. Unlike passive filters, active filters are adaptable to rapidly changing source impedance and provide the necessary harmonic compensation for varying non-linear loads. This thesis models a Voltage Source Converter (VSC) based shunt active filter (SAF) to …
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EMTP simulation of an active filter operating with weak AC distribution system
… to high harmonic load currents. Traditionally passive filters are used for filtering these load harmonics. Recent technological advances have enabled the use of high frequency switching devices in the development of active filtering techniques. In this thesis, an active filter topology was …
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Design and implementation of three-phase four-wire active filters
… as are found in standards such IEEE-519. Passive filters have been used to limit the flow of harmonic currents in distribution systems. However, these tend to be bulky and the design is complex, particularly if the number of harmonic components to be reduced increases. With improvements in …
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Control of Harmonics in 6-Pulse Rectifiers
… Based on the system configuration either active filters, passive filters, or phase shifting methods are used. In medium voltage high power applications, generally, phase shifting method is better suited.</p> <p>In addition to harmonic distortion in AC side, AC-DC converter produce ripple in DC …
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A Virtual Space Vectors based Model Predictive Control for Three-Level Converters
… further leads to considerably smaller output ac passive filters.</p> <p>Various control strategies have been proposed and implemented for 3-L VSCs. Among all the existing control methods, finite-control-set model predictive control (FCS-MPC) has been extensively investigated and applied due to …
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Design of High-Density Filter Building Blocks for SiC-based Three-Phase Power Converters
… which reportedly can minimize the size of passive components such as DC-link capacitors and line harmonic filters. Unfortunately, with faster switching speeds and high slew rates, the common-mode (CM) and differential-mode (DM) conducted emissions interference (EMI) noise is worsened. The …
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Ac-dc Bus-interface Bi-directional Converters in Renewable Energy Systems
… system reliability is improved. A set of ac passive plus active filter solutions is proposed for the ac-dc bus-interface converter which significantly reduces the total power filter volume but still eliminate the total leakage current and the common-mode conducted EMI noises by more than 90%. …