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.
Results
Showing 1 to 20 of 440 for “"dc/dc"”.
-
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) …
-
Development of Monolithic DC -Dc Converters
… demonstrate full integration of the monolithic dc-dc converters. The experimental results confirm the feasibility of the proposed concepts and suggest a few future areas of research.
-
Radio frequency dc-dc power conversion
… system architectures and circuit topologies for dc-dc power conversion at very high frequencies. The systems architectures that are developed are structured to overcome limitations associated with conventional designs. In particular, the new architectures described here structure the energy …
-
Current Sharing Method for DC-DC Transformers
… output converter. It can be replaced by a dc-dc transformer (DCX), which is a semi-regulated or unregulated, single output dc-dc converter. A DCX can be made using a modular design to simplify expansion of the system capacity. To realize this concept, the DCX block must have a current …
-
Design of high-density dc/dc converters
… implement efficient, high-density (>50 W/in³) dc/dc converters. A low-profile high-density power stage of a 25 W dc/dc flyback ZVS-MRC is designed and built, and experimental results are shown. A high-density control circuit for a 50 W forward ZVS-MRC is designed using an integrated controller. …
-
Design zero-voltage switching DC-DC buck converter
… high switching frequency, zero-voltage-switching dc-dc buck converter for battery charger application. The design and analysis of dc�dc buck converter with integrated inductor is presented. The converter has been optimized to convert 12V input voltage to 5V at 1.5A maximum load current at 50MHz …
-
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 …
-
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 …
-
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 …
-
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, …
-
Radio frequency rectifiers for DC-DC power conversion
… a desire to increase the level of integration of DC-DC converters in order to take advantage of the cost and other benefits of batch fabrication techniques. While advances in the power density and integration of DC-DC converters have been realized through development of better active device …
-
Design of zero-current switching DC-DC buck converter
… project presents a zero-current switching (ZCS) DC-DC buck converter design, simulation and application. The converter control uses with ZCS technique to decrease the switching losses. Comparing to conventional buck converter, resonant buck converter includes a resonant tank equipped with …
-
Planar Magnetics Design For Low-voltage Dc-dc Converters
The objectives of this thesis are to design planar magnetic devices based on accurate electromagnetic analysis and miniaturize magnetics within desired low profile as well as small footprint. A novel methodology based on FEM simulation is proposed. By introducing Maxwell 2D simulator, optimal …
-
Bi-directional DC-DC converter for low power applications
… using bi-directional converters, especially in DC power based applications like space, telecommunication and computer systems. A bi-directional dc-dc converter, capable of bilateral power flow, provides the functionality of two uni-directional converters in a single converter unit. This thesis …
-
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 …
-
Integrated Switching DC-DC Converters with Hybrid Control Schemes
… low cross regulation.All three integrated CMOS DC-DC converters have been designed and fabricated successfully, demonstrating the techniques proposed in this research. The measurements results illustrate superior line and load regulation performances and dynamic response in all these designs.
-
Time-based control techniques for integrated DC-DC conversion
… or high-resolution analog-to-digital converter (ADC) and digital PWM in digital controllers. As a result, it can be implemented in a small area and with minimal power. First, a time-based single-phase buck converter is proposed and fabricated in a 180nm CMOS process, the prototype buck converter …
-
Observer based fault detection in DC-DC power converters
… hardware testbed. This testbed is comprised of a dc-dc buck converter. The detection filters for monitoring the health of the components in this dc-dc converter, as well as the converter controls, are implemented in a low-cost DSP. Using a lossy converter model which runs in real time on the DSP, …
-
Efficiency optimisation in a DC-DC chopper motor drive
A complete DC-DC motor drive (battery, chopper, and motor) - is investigated with a view to optimising efficiency. The losses at each stage are analysed in detail and proposals are made to minimise them. The overall system is also modelled for the purpose of computer simulation. The computer model …
-
Design of miniaturized radio-frequency DC-DC power converters
Power electronics appear in nearly every piece of modern electronic hardware, forming an essential conduit from electrical source to load. Portable electronics, an area where a premium is placed on size, weight, and cost, are driving the development of power systems with greater density and better …
Page 1 of 22