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 54 for “"Light load"”.
-
Light-load power management in differential power processing systems
This Dissertation was approved for publication on 2020-04-03 at 15:58.
-
A Two-Mode Synchronous Buck Converter for Low-Power Devices with the Sleep Mode
… in car black box varies significantly between light load and heavy load. The high efficiency voltage regulator is necessary in prolong the life of smart camera battery. Since the smart camera only recording the video when car is driving, the most time of the smart camera works in the sleep …
-
A Two-Phase Buck Converter with Optimum Phase Selection for Low Power Applications
… to increase the power converter efficiency for light load, while being able to manage heavy load. The power stage of traditional buck converter is optimized for maximum load, at the cost of light-load efficiency. Wei proposed a multiphase buck converter incorporating the baby-buck concept and …
-
A Two-mode Buck Converter toward High Efficiency for the Entire Load Range for Low Power Applications
… efficiency of power converters, especially at light load. This thesis research investigated a power converter to supply power for the microprocessor of a smart camera. The input voltage of the converter is 5 V, and the output voltage is 1.2 V with the load ranging from 10 mA (12 mW) to 1200 mA …
-
A Constant ON-Time 3-Level Buck Converter for Low Power Applications
… cameras operate mostly in sleep mode, which is light load for power supplies. Typical buck converter applications have low efficiency under the light load condition, primarily from their power stage and control being optimized for heavy load. The battery life of a smart camera can be extended …
-
High Voltage Synchronous Rectifier Design Considerations
… rectifier: (1) high voltage sensing; (2) light load effects; (3) accuracy. The first hurdle to designing a high voltage SR system is the high voltage itself. Traditional methods of synchronous rectification (SR) attempt to directly sense voltage or current, which is not possible with high …
-
Beyond PWM: Active balancing, start-up and ZVS for multi-level converters with applications in renewable energy systems
… However, prior work did not account for light load conditions, which we show to be challenging for traditional duty cycle compensation. Here we derive the light load conditions that lead to instability, and propose a new constant effective duty cycle compensation method for active …
-
Voltage regulation of a series stacked system of digital loads by differential power processing
… to be an efficient way to series-stack server loads. In this work we study the dynamics of the element-to-element DPP topology implemented with bi-directional buck-boost converters. Some of its dynamic drawbacks are pointed out and a topological modification to counter those drawbacks is …
-
Voltage regulation of a series stacked system of digital loads by differential power processing
… to be an efficient way to series-stack server loads. In this work we study the dynamics of the element-to-element DPP topology implemented with bi-directional buck-boost converters. Some of its dynamic drawbacks are pointed out and a topological modification to counter those drawbacks is …
-
Investigation on Interleaved Boost Converters and Applications
… such as power scalability, high entire-load-range efficiency, and high power density. Power scalability is a very desirable and cost-effective approach in the PFC design in order to keep up with servers' growing power requirements. Higher power density can eventually reduce the converter …
-
High Frequency High-Efficiency Voltage Regulators for Future Microprocessors
… VR needs to have high efficiency at both heavy load and light load, good transient response and small and light form-factor, and work well with the wide input voltage range. Future mobile CPUs demand very aggressive power. The current single-stage VR approach cannot provide a suitable solution …
-
Development of Mechanistic Flexible Pavement Design Concepts for the Heavyweight F-15 Aircraft (Airfield, Computer Design, Cbr, Algorithms)
… This heavyweight F-15 has a 30-kip/355-psi wheel loading. A heavier-weight F-15 with 36-kip/395-psi wheel loading has been proposed for use. The F-15 will become the controlling aircraft for design of airfield Light-Load Pavements. A review is presented of the concepts and development of the …
-
An improved electronic ballast for the fluorescent lamps
… voltage stress on the semiconductor devices at light load conditions, the high total harmonic distortion (THO) of the line current, and the poor crest factor ( CF) of the lamp current in this circuit make it difficult to manufacture this circuit into a cost-effective ballast product. This thesis …
-
Magamp post-regulator applied to a quasi-resonant converter and magamp operation under extreme load condition in a PWM converter
… is the operation of a magamp under extreme loading conditions. Practical design equations are derived to allow magamp operation under extreme load conditions such as shutdown of output, foldback of output current and very light load (discontinuous operation). The other issue considered …
-
Investigation of Multiphase Coupled-Inductor Buck Converters in Point-of-Load Applications
… are widely used in today's industrial point-of-load (POL) converters, especially the microprocessor voltage regulators (VRs). The issue of today's multiphase interleaving buck converters is the conflict between the high efficiency and the fast transient in the phase inductor design. In 2000, P. …
-
Two-Phase Buck Converter Optimize by Echo State Network
… number of applications. Optimized the maximum load to increase the buck converter's efficiency at the cost of light load efficiency is a general way used in a traditional buck converter because it has a higher impact on power consumption. We propose a novel way of designing the two-phase buck …
-
Power Architectures and Design for Next Generation Microprocessors
… very high efficiency, high power density, high light-load efficiency, as well as meet all transient requirements by the CPU and GPU. Transferring the well-developed multi-phase buck converter used in the 12V VRM to the 48V distribution platform is not that simple. The buck converter operating …
-
Miniaturized, low-voltage power converters with fast dynamic response
… switched capacitor (SC) techniques (small size, light-load performance) with the high efficiency and regulation capability of switch-mode power converters. The resulting designs have a superior efficient-power density trade-off over traditional designs. These power converters can provide numerous …
-
State-Trajectory Analysis and Control of LLC Resonant Converters
… servers, desktops, laptops, flat-panel TVs, LED lighting, etc. are required for more power delivery with smaller spaces. The LLC resonant converter has been widely adopted for these applications due to the advantages in high efficiency, high power density and holdup time operation capability. …
-
Advanced Single-Stage Power Factor Correction Techniques
… single-stage converter. DC bus voltage stress at light load for the single-stage PFC converters are analyzed. DC bus voltage feedback concept is proposed to reduce the DC bus voltage stress at light load. The principle of operations of proposed converters are presented, implemented and evaluated. …
Page 1 of 3