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 8 of 8 for “"diode rectifiers"”.
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High frequency AC power converter for low voltage circuits
… matching networks and individual full bridge rectifiers, and a 3-phase delta-to-wye matching network and a 3-phase rectifier bridge. In addition, a novel switch-capacitor rectifier capable of 3V, 1W output, was evaluated as an alternative circuit to the diode rectifiers. A 50MHz prototype of …
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Enhanced next generation alternator
… Alternator designs with conventional diode rectifiers and switched-mode rectifiers are investigated. It is found that optimized Lundell alternators are capable of meeting the demands of future systems, and that wound field synchronous machines may also be competitive. It is also found …
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A modified asymmetrical pulse-width modulated series resonant DC/DC converter
… performance, the use of MOSFETs as synchronous rectifiers in place of diode rectifiers is proposed. Two examples of synchronous rectifier topologies that are applicable to the converter under study are investigated. Computer simulation shows the feasibility of employing synchronous rectification …
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Critical Evaluation of DC-Grid and Strong Grid-Forming Wind Generator Systems
… reveals that the fundamental power factor of diode rectifier-connected generators deviates from the commonly assumed unity value, which is crucial for accurate system modeling. Stability analysis proves that overdamped operation is achieved through proper grid frequency feedback in the MG …
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New Multi-Phase Diode Rectifier Average Models for AC and DC Power System Studies
… modeling approach for three-phase and nine-phase diode rectifiers with improved ac and dc dynamics is proposed in this dissertation. The key assumption is to model the load current using its first-order Taylor Series expansion throughout the entire averaging time span. A thorough comparison in the …
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Identification of small-signal dq impedances of power electronics converters via single-phase wide-bandwidth injection
… small-signal input dq admittance of multi-pulse diode rectifiers, providing comparison between well-known averaged value models (AVMs), parametric averaged value models (PAVM), the switching simulation model and hardware measurements. Analytical expressions for all four admittances present in the …
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An integrated generator-rectifier system for high-power AC-DC conversion
… conversion architectures rely heavily on active rectifiers, which consist of fully-controlled power-electronics switches. These make the system bulky, lossy, and less reliable. This dissertation presents an alternative approach: integrating a multi-port permanent magnet synchronous generator …
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Modeling and Control of a Synchronous Generator With Electronic Load
… active dc load (inverter) through a three-phase diode rectifier requires adequate modeling in both time and frequency domain. In particular, the system's control-loops, responsible for stability and proper impedance matching between generator and load, are difficult to design without an accurate …