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 37 for “"VRM"”.
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High performance control of VRM circuits
Voltage Regulator Modules (VRM), which are used to power advanced microprocessors, have stringent efficiency and transient response requirements. The multiphase buck converter topology is popularly used for such application, because of its ability to handle large load current and to achieve fast …
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High-Frequency and High-Performance VRM Design for the Next Generations of Processors
… First, today's voltage-regulator module (VRM) design, which is based on the multiphase interleaving buck topology, is thoroughly analyzed. The analysis results of the control bandwidths versus the VRM transient voltage spikes highlight the trend of high-frequency VRM design for smaller …
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System-level optimization of the DC-DC voltage regulator and core for sub/near-threshold voltage operation
Switched capacitor voltage regulator module (SC-VRM) is suitable for low power embedded systems operating in near/sub-threshold region due to its high conversion ratio and compactness. However, existing optimization for SC-VRM is separated from the embedded core design and therefore leads to …
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Effect of VRM on a polymetallic sulfide ore and the flotation response as compared to conventional wet and dry rod milling
… grinding equipment, Vertical Roller Mills (VRMs) and High-Pressure Grinding Rolls (HPGRs) have been identified as potential solutions, and they have been adopted in the cement industry. Reports from plants where these technologies have been installed in circuits indicate they are more energy …
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A Non-isolated Half Bridge Buck-based Converter For Vrm Application And Small Signal Modeling Of A Non-conventional Two Phase Bu
This dissertation is about treatment of the nonbiodegradable organic content of landfill leachate by chemical oxidation combined with biological treatment. It is divided into three parts. In the first part, ferrate was compared to Fenton's reagent for the purpose of removing non-biodegradable …
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Application of variation risk management processes in commercial aircraft design and manufacture
… with this task is Variation Risk Management (VRM). The problem with VRM and other methodologies is that they are often treated as side processes that do not get well integrated into the overall product development process. This results in training and improvement activities that optimize VRM …
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Modeling the stream temperature regime of the East Fork of the Virgin River in Zion National Park
… Fork of the Virgin River at Virgin River Mile (VRM) 157.3. Diurnal fluctuations in the stream temperature of 10°C were common. The average maximum, mean, and minimum stream temperatures for the study period were 26.7°C, 21.8°C, and 17.0°C, respectively during which the average flow was 1076 l/s. …
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The Impact of Fearfulness on Childhood Memory: Attention, Effortful Control, and Visual Recognition Memory
… were associated with right frontal asymmetry. VRM performance was also associated with more right frontal functioning. Fearfulness regulated the relation between attention and VRM as well as moderated the relation between effortful control and VRM. This study provided some evidence for the …
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High Frequency, High Current Integrated Magnetics Design and Analysis
… A special DC-DC converter called a VRM (Voltage Regulator Module) is used to power these machines. The VRM faces the task of supplying high current and high di/dt to the microprocessor while maintaining a tight load regulation. As computers have advanced, so have the VRM's used to …
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Performance Improvements of Multi-Channel Interleaving Voltage Regulator Modules with Integrated Coupling Inductors
… converter, the voltage regulator module (VRM), be physically located very close to the processor in computer power systems. The efficiency and transient response specifications of the VRM place contradictory requirements on the inductance. This dissertation discusses possible VRM inductor …
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Control and Modeling of High-Frequency Voltage Regulator Modules for Microprocessor Application
The future voltage regulator module (VRM) challenges of high bandwidth control with fast transient response, high current output, simple implementation, and efficient 48V solution are tackled in this dissertation. With the push for control bandwidth to meet design specifications for microprocessor …
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Investigation of High-Input-Voltage Non-Isolated Voltage Regulator Modules Topology Candidates
… 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, microprocessors will run …
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High Frequency, High Current Density Voltage Regulators
As a very special DC-DC converter, VRM (Voltage Regulator Module) design must follow the fast-developing trend of microprocessors. The design challenges are the high current, high di/dt, and stringent load-line requirement. When the energy is transferred from the input of a VRM, through the VRM, …
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Device Selection Criteria--Based on Loss Modeling and Figure of Merit
… industry has been struggling to operate the VR/VRM at higher and higher switching frequencies while maintaining acceptable power conversion efficiency. As a consequence, the power switches used in the VR/VRM must be able to work efficiently at a higher switching frequency and with a higher …
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Power Architectures and Design for Next Generation Microprocessors
… challenges for the voltage regulator modules (VRMs) required for powering the processor. The 48V VRM in the vicinity of the CPU needs to be designed with very high efficiency, high power density, high light-load efficiency, as well as meet all transient requirements by the CPU and GPU. …
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Low-voltage High-efficiency Fast-transient Voltage regulator Module
… power supplies and Voltage Regulator Modules (VRMs) to provide lower voltages with higher currents and fast transient capabilities for microprocessors. This work presents several low-voltage high-current VRM technologies for future generation data processing, communication, and portable …
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Performance of the vertical roller mill in a mineral processing application when coupled with internal and external classifiers
… industries, such as the vertical roller mill (VRM), a high compression dry grinding device, have the potential to contribute towards enhancing the energy efficiency of comminution and the sustainability of mineral processing. The vertical roller mill is used extensively in cement and coal …
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Design of Active Clamp for Fast Transient Voltage Regulator-Down (VRD) Applications
… 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, microprocessors will run …
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Design of robust ultra-low power platform for in-silicon machine learning
… devices). This dissertation presents the Compute VRM (C-VRM) to embed the information processing into the energy delivery subsystem. The C-VRM employs multiple voltage domain stacking and core swapping to achieve high total system energy efficiency in near/sub-threshold region. A prototype IC of …
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Multiphase Voltage Regulator Modules with Magnetic Integration to Power Microprocessors
… impose challenges for voltage regulator modules (VRM) to deliver high-quality power to modern microprocessors. As an enabling technology, multiphase converters have become the standard practice in VRM industry. The primary objectives of this dissertation are to develop advanced topologies and …
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