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 233 for “"DC-DC converter"”.
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Cell modulated DC/DC converter
A very high frequency converter roughly based on a class E topology is investigated for replacing a conventional boost converter circuit. The loss mechanisms in class E inverters are characterized, and metrics are developed to aid in device selection for high frequency converter. A (30 MHz) …
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FPGA-based digital controller for dc-dc converter
… presents a FPGA-based digital controller for a DC-DC converter. The converter topologies chosen in this project is Non-Inverting Buck-Boost converter. The main difference from DSP-based solution is that FPGA allows simultaneous execution of all control procedures. The control algorithm has been …
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High Slew Rate High-efficiency Dc-dc Converter
… in low switching frequency mainly providing DC current. Parallel ATVC has largely reduced conduction and switching losses. Parallel ATVC also reduces the number of VR bulk capacitors. Combined linear and adaptive nonlinear control has been proposed to reduce delay times in the actual …
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DC/DC converter for offshore DC collection network
… internal interconnection. While advanced HVDC transmission has addressed the issue of long-distance transmission, internal wind farm power networks have seen relatively little innovation. Recent studies have highlighted the potential benefits of DC collection networks. First with appropriate …
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A Novel DC-DC Converter for Photovoltaic Applications
… a clean energy future. In this thesis, a novel DC-DC converter known as the Coupled Inductors Combined Cuk-SEPIC' (CI-CCS) converter is explored, which is particularly attractive for these photovoltaic applications. A topological modification is investigated which provides several benefits, …
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Bi-directional DC-DC converter for low power applications
… been implemented with two uni-directional converters; each processing the power in one direction. With growing emphasis on compact, smaller and efficient power systems there is increasing interest in the possibility of using bi-directional converters, especially in DC power based …
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High Voltage DC-DC Converter Design for Submarine Application
… this work a proof of concept for a step-down DC-DC converter used in a high voltage submarine application is presented. The purpose of the converter is to step down a 5000V-6000V input to a 24V output which can serve as an input to a submarine sensor. The completed system consists of two …
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A global maximum power point tracking DC-DC converter
… and validation of a maximum power point tracking DC-DC converter capable of following the true global maximum power point in the presence of other local maximum. It does this without the use of costly components such as analog-to-digital converters and microprocessors. It substantially increases …
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45nm direct battery DC-DC converter for mobile applications
… as high as 4.2V. This is efficiently done by a DC-DC converter which is a separate IC designed on an older generation process capable of handling high voltages. However, this requires an extra IC, thereby increasing the overall system cost. Here, a buck converter is demonstrated on a standard …
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Integrated DC-DC converter with ultra-low quiescent current
… a comparator for use in the control circuitry of DC-DC converter with an ultra-low quiescent current of 150nA is presented here. Not only will this thesis discuss the challenges encountered over the course of designing circuits to operate at such low current levels, but it will also provide proof …
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Planar transformer isolated DC-DC Converter for Solid-State Transformer
… high power density and high efficiency on power converters has been increasing through the years. Solid state transformer (SST), which is typically formed by three stages, one being DC/AC inverter, which is controllable, one being medium-frequency transformer isolated converter and the other …
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Current-Source DC-DC Converter for Fiber-Optic Communication Systems
… thesis, a proof of concept for a current-source DC-DC converter for powering sensors used in an underwater communications system is presented. The proposed converter steps down an input current of 0.9 A to 0.625 A, while maintaining an output voltage of 24 V and output power of 15 W. The complete …
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1500W High Voltage DC-DC Converter for Electroaerodynamic Aircraft Applications
… of increasing the specific power of power converters for EAD aircraft from 1.15 kilowatts per kilogram to over 2.0 kilowatts per kilogram. Such an increase can be achieved by utilizing magnetics integration and thermal management techniques, as well as adjustments in the operating point of …
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High efficiency resonant dc/dc converter for solar power applications
… presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage switching and near zero current switching across a wide range of input voltage, output voltage and power level. The resistance …
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Study on Three-level DC/DC Converter with Coupled Inductors
High power multi-level converters are deemed as the mainstay power conversion technology for renewable energy systems including the battery storage system, PV farm and electrical vehicle charge station. This thesis is focused on the study of three-level DC/DC converter with multi-phase interleaved …
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A modified asymmetrical pulse-width modulated series resonant DC/DC converter
… pulse-width modulated (APWM) resonant DC/DC converter is a simple topology that operates at a constant frequency and with near-zero voltage switching losses. However, the range of input voltage where high efficiency is maintained is narrow. After a certain limit, zero voltage switching …
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A Two-Stage Piezoelectric Resonator and Switched Capacitor DC-DC Converter
Power converters are used in virtually every area of our lives from electric vehicle charging stations to television screens. Presently, magnetics pose a challenge for miniaturization as they fundamentally decrease in achievable power density at small scales. Our solution to this problem is to …
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Design of a very high frequency resonant boost DC-DC converter
… the development of a very high frequency DC-DC resonant boost converter. The topology examined features low parts count and fast transient response but suffers from higher device stresses compared to other topologies that use a larger number of passive components. A new design methodology …
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Design and evaluation of a very high frequency dc/dc converter
… for very high frequency (VHF, 30-300 MHz) dc-dc power conversion. The proposed design is a fixed frequency, fixed duty ratio resonant converter featuring low device stress, high efficiency over a wide load range, and excellent transient performance. A 110 MHz, 23 W experimental converter …
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Isolated Bi-directional DC-DC Converter with Smooth Start-up Transition
The bi-directional dc/dc converter is a very popular and effective tool for alternative energy applications. One way it can be utilized is to charge and discharge batteries used in residential solar energy systems. In the day, excess power from the PV panels is used to charge the batteries. During …
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