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 “"single phase ac-dc"”.
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Generalized Average-Current-Mode Control of Single-Phase AC-DC Boost Converters with Power Factor Correction
… average-current-mode control technique (GACMC), which is an extension of the average-current-mode control (ACMC) for single-phase ac-dc boost converters with power factor correction (PFC). Traditional ACMC is generalized in a sense that it offers improved performance in the form of …
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Stacked-Switched Electrolytic Capacitor-less AC/DC Power Converters
… Vehicles (EVs) has increased the demand for compact, efficient, and reliable On-Board Chargers (OBCs) capable of interfacing directly with the AC grid. Conventional single-phase AC/DC converters often depend on bulky electrolytic capacitors, diode bridges, and hard-switching circuits, leading to …
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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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Toward high-efficiency high power density single-phase DC-AC and AC-DC power conversion - architecture, topology and control
Power conversion between the single-phase AC grid and DC sources or loads plays an indispensable role in modern electrical energy system for both generation and consumption. The renewable resources and electrical energy storage are integrated to the grid through inverters. Telecoms, data centers …
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Improving data center power delivery efficiency and power density with differential power processing and multilevel power converters
… power delivery efficiency decreases each time the requisite power is processed through the individual stages, and the total power converter footprint increases by each cascaded conversion stage. Innovative approaches are investigated in this dissertation for dc-dc step-down conversion …
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Novel Voltage Control Methods for quasi-Z-source Network Converters with Focus on Fixed DC-Link Voltage, Constant- Frequency and Soft-Switching Operation
… (qZS) converters are especially attractive for their single-stage buck–boost capability, continuous input current, and inherent reliability. A central challenge, however, is the intermediate DClink capacitor: its voltage varies with operating conditions. Low DC-link voltage drives …
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Control of DC Power Distribution Systems and Low-Voltage Grid-Interface Converter Design
DC power distribution has gained popularity in sustainable buildings, renewable energy utilization, transportation electrification and high-efficiency data centers. This dissertation focuses on two aspects of facilitating the application of dc systems: (a) system-level control to improve load …
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High performance electronic systems for high bay light emitting diodes fed from alternating current power grids
… to their reliability, long life, luminous efficacy and low maintenance requirements. However, LEDs are diodes, which means that the current is able to go through them in only one direction. This fact is of utter importance because of the direct relationship between the light outputted by the LED …