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 134 for “"input voltage"”.
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Operation of buck regulator with ultra-low input voltage
… in this thesis aims to lower the allowed input voltage and increase efficiency compared to the original part without making significant changes to quiescent current and part performance. This thesis will discuss additions and modifications made to the original afformentioned parts in order …
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Investigation of High-Input-Voltage Non-Isolated Voltage Regulator Modules Topology Candidates
… the 5V plane on the system board. A so-called Voltage Regulator Module (VRM), is put close to the processor in order to provide the power as quickly as possible. Nowadays, for desktop and workstation applications, VRM input voltage has moved to the 12V output of the silver box. In the meantime, …
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Adaptive Control of a Step-Up Full-Bridge DC-DC Converter for Variable Low Input Voltage Applications
… stage of a power conversion system where the input is a variable low voltage high current source. The converter is designed to step-up the low voltage input to an acceptable level that can be inverted to a 120/240 VAC 60Hz voltage for residential power. A DSP based adaptive control model is …
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Dependence of Set, Reset and Breakdown Voltages of a MIM Resistive Memory Device on the Input Voltage Waveform
… and repeatedly by application of appropriate voltages. Although, there exists a large body of literature on this topic, many aspects of the CBRAM mechanisms and are still poorly understood. In the next paragraph, the aspects of CBRAM studied in this thesis are spelled out in more detail. CBRAM …
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TECHNOLOGIES TO IMPROVE GAN-BASED LLC RESONANT CONVERTER FOR WIDE INPUT VOLTAGE, HIGH OUTPUT CURRENT AC-DC AND DC-DC APPLICATIONS
… in industrial applications, including wide input voltage range, poor feedback performance, output current unbalance among multiply phases, and double line frequency ripple with power factor correction (PFC). Aiming at these issues, several solutions have been proposed. A single-stage LLC …
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Comparative analysis of high input voltage and high voltage conversion ratio step-down converters equipped with silicon carbide and ultrafast silicon diodes
DC to DC step-down applications with high input voltage and high voltage conversion ratio operational requirements, such as photovoltaic battery chargers, are subject to high conduction losses, high switching losses and substantial reverse-recovery losses when minority carrier principle diodes are …
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Implementation of ACR and AVR controls for high voltage gain DC-DC Converter
… use the DC-DC boost converter to get higher DC voltage from the low input voltage. In this project, Marx topology boost converter (MTBC) analyzed and proposed for conversion from low input dc voltage to high output dc voltage. (MTBC) depends on the principle of the Marx generator. The proposed …
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ANALYSIS, OPTIMIZATION, AND PRACTICAL DESIGN OF A SPLIT-PHASE DICKSON SWITCHED CAPACITOR CONVERTER FOR HIGH CURRENT APPLICATIONS
… capacitors, such that the equivalent branch voltages line up when switching occurs. In adapting the split-phase Dickson SCC topology for high-current applications, two significant sensitivities of split-phase control were identified. Differences between the actual values of the flying …
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Determining the Optimum Operating Parameters of a Unipolar PWM Inverter
… is investigated in its simplest form without input DC-DC conversion or output filtering. The intent of this study is to understand the core of the inverter thoroughly before adding peripheral elements such as output filtering. Variations on the input voltage level and switching frequency were …
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Miniaturized, low-voltage power converters with fast dynamic response
… These power converters can provide numerous lowvoltage outputs over a wide input voltage range with a very fast dynamic response, which are ideal for powering logic devices in the mobile and high-performance computing markets. Both design and fabrication considerations for power converters using …
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Investigation and application of high-efficiency large-step-down power conversion architectures
… architectures that are designed to provide zero-voltage switching of the power devices. While the techniques used in these converters can be used in a wide range of applications, the operating voltage and power levels used in this thesis are for data centers, where dc distribution power delivery …
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Self-Oscillating Unified Linearizing Modulator
… control gain is defined as the ratio of output voltage to control signal. The small-signal control gain is defined as differentiating output voltage with respect to control signal. Feedback control helps to make the output trace the reference signal. A large-signal control-to-output linearity is …
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Development of repetitive current control for lead acid battery using arduino
… uses Buck-Boost converter circuit with reference voltage of 14V from lead acid battery. The range of buck operation input voltage is between 18V to 15V while boost operation input voltage range is between 10V to 13V. The current sensor uses in this project is to measure the output current with …
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A MEMS-based precision operational amplifier
… and the leakage current of the amplifier input stage. This thesis presents a novel fully integrated operational amplifier design that addresses both measurement limitations by using a fully differential mechanical transductor input stage, fabricated using SOI-MEMS technology. The input …
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Voltage-to-digital converter design
This thesis treats broad aspects of voltage-to-digital converter design. Particular emphasis is placed on material related to designing a converter to satisfy a set of converter specifications that is given in the introduction of the thesis. The converter design is first considered in terms of …
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Two-Phase Buck Converter Optimize by Echo State Network
… converter is a power converter which drops high input voltage into a low output voltage in high efficiency. With this characteristic, it has been used in a great number of applications. Optimized the maximum load to increase the buck converter's efficiency at the cost of light load efficiency is …
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DESIGN AND ANALYSIS OF CONTROLLERS FOR BOOST CONVERTER USING LINEAR AND NONLINEAR APPROACHES
… basic types of power converters: buck (output voltage less than the input voltage), boost (output voltage higher than the input voltage) and buck-boost converters. The reliability of the power converters has become an essential focus of industrial applications. This research presents modeling …
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High Step-Up/Down Transformerless Multilevel Converter for Renewable Energy Applications
… to dc power systems. The design achieves high voltage ratios for interfacing renewable energy sources such as photovoltaic and line interactive Uninterruptible Power System (UPS) systems. The circuit topology provides for high step-up/down dc-dc conversion ratios using an MMC approach operating …
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Large signal transient analysis of duty ratio controlled DC-to-DC converter
… of practical interest including start-up, step input voltage change and step-load change are analyzed. The effect of large-signal characteristics of the feedback controller on the transient trajectory is presented.
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Design zero-voltage switching DC-DC buck converter
… an integrated, 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 …
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