Investigation And Application Of High Efficiency Large Step Down Power Conversion Architectures

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Investigation and Application of High-efficiency Large-step-down Power Conversion Architectures

Author : Samantha Joellyn Gunter
Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.:/5 (972 download)

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Book Synopsis Investigation and Application of High-efficiency Large-step-down Power Conversion Architectures by : Samantha Joellyn Gunter

Download or read book Investigation and Application of High-efficiency Large-step-down Power Conversion Architectures written by Samantha Joellyn Gunter and published by . This book was released on 2016 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we introduce two large-step-down dc-dc converter 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 is expected to see its first deployment. The nominal 380 V bus voltage will need to be converted to 12 V using a high-efficiency dc-dc converter that can deliver several hundred watts of power to each rack to power the servers. The converters are expected to operate efficiently across a wide input voltage range of 260 V to 410 V and down to powers in the tens of watts range. The first converter architecture is based on the concept of an Impedance Control Network (ICN) resonant converter. Using phase-shift control along with a specifically designed impedance network, this converter can maintain resistive loading of the inverters as the input voltage varies. To back down in power, the converter can be efficiently operated using burst (on/off) mode control. To deliver lower power, we introduce an additional control technique using Variable Frequency Multiplier (VFX) inverters and/or rectifiers. The second converter architecture combines the properties of an active bridge converter with multiple stacked inverters, a multi-winding single core transformer, and a reconfigurable rectifier. The stacked inverter topology improves the range of powers over which zero-voltage switching can be achieved. The multi-winding transformer and reconfigurable rectifier further extend the efficient operating range to very low powers by reducing core loss and increasing zero-voltage switching capability. Both proposed architectures are suitable for large-step-down, wide-input voltage, wide-output power applications such as dc-dc converters for dc distribution.

Architectures and Circuits for Low-voltage Energy Conversion and Applications in Renewable Energy and Power Management

Author : Robert C. N. Pilawa-Podgurski
Publisher :
ISBN 13 :
Total Pages : 343 pages
Book Rating : 4.:/5 (795 download)

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Book Synopsis Architectures and Circuits for Low-voltage Energy Conversion and Applications in Renewable Energy and Power Management by : Robert C. N. Pilawa-Podgurski

Download or read book Architectures and Circuits for Low-voltage Energy Conversion and Applications in Renewable Energy and Power Management written by Robert C. N. Pilawa-Podgurski and published by . This book was released on 2012 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis we seek to develop smaller, less expensive, and more efficient power electronics. We also investigate emerging applications where the proper implementation of these new types of power converters can have a significant impact on the overall system performance. We have developed a new two-stage dc-dc converter architecture suitable for low-voltage CMOS power delivery. The architecture, which combines the benefits of switched-capacitor and inductor-based converters, achieves both large voltage step-down and high switching frequency, while maintaining good efficiency. We explore the benefits of a new soft-charging technique that drastically reduces the major loss mechanism in switched-capacitor converters, and we show experimental results from a 5-to-1 V, 0.8 W integrated dc-dc converter developed in 180 nm CMOS technology. The use of power electronics to increase system performance in a portable thermophotovoltaic power generator is also investigated in this thesis. We show that mechanical non-idealities in a MEMS fabricated energy conversion device can be mitigated with the help of low-voltage distributed maximum power point tracking (MPPT) dc-dc converters. As part of this work, we explore low power control and sensing architectures, and present experimental results of a 300 mW integrated MPPT developed in 0.35 um CMOS with all power, sensing and control circuitry on chip. The final piece of this thesis investigates the implementation of distributed power electronics in solar photovoltaic applications. We explore the benefits of small, intelligent power converters integrated directly into the solar panel junction box to enhance overall energy capture in real-world scenarios. To this end, we developed a low-cost, high efficiency (>98%) power converter that enables intelligent control and energy conversion at the sub-panel level. Experimental field measurements show that the solution can provide up to a 35% increase in panel output power during partial shading conditions compared to current state-of-the-art solutions.

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 704 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Scientific and Technical Aerospace Reports by :

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High-Ratio Voltage Conversion in CMOS for Efficient Mains-Connected Standby

Author : Hans Meyvaert
Publisher : Springer
ISBN 13 : 3319312073
Total Pages : 161 pages
Book Rating : 4.3/5 (193 download)

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Book Synopsis High-Ratio Voltage Conversion in CMOS for Efficient Mains-Connected Standby by : Hans Meyvaert

Download or read book High-Ratio Voltage Conversion in CMOS for Efficient Mains-Connected Standby written by Hans Meyvaert and published by Springer. This book was released on 2016-05-24 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes synergetic innovation opportunities offered by combining the field of power conversion with the field of integrated circuit (IC) design. The authors demonstrate how integrating circuits enables increased operation frequency, which can be exploited in power converters to reduce drastically the size of the discrete passive components. The authors introduce multiple power converter circuits, which are very compact as result of their high level of integration. First, the limits of high-power-density low-voltage monolithic switched-capacitor DC-DC conversion are investigated to enable on-chip power granularization. AC-DC conversion from the mains to a low voltage DC is discussed, enabling an efficient and compact, lower-power auxiliary power supply to take over the power delivery during the standby mode of mains-connected appliances, allowing the main power converter of these devices to be shut down fully.

Handbook of Research on Power and Energy System Optimization

Author : Kumar, Pawan
Publisher : IGI Global
ISBN 13 : 1522539360
Total Pages : 777 pages
Book Rating : 4.5/5 (225 download)

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Book Synopsis Handbook of Research on Power and Energy System Optimization by : Kumar, Pawan

Download or read book Handbook of Research on Power and Energy System Optimization written by Kumar, Pawan and published by IGI Global. This book was released on 2018-03-16 with total page 777 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the development of advanced structures for providing sustainable energy has been a topic at the forefront of public and political conversation. Many are looking for advancements on pre-existing sources and new and viable energy options to maintain a modern lifestyle. The Handbook of Research on Power and Energy System Optimization is a critical scholarly resource that examines the usage of energy in relation to the perceived standard of living within a country and explores the importance of energy structure augmentation. Featuring coverage on a wide range of topics including energy management, micro-grid, and distribution generation, this publication is targeted towards researchers, academicians, and students seeking relevant research on the augmentation of current energy structures to support existing standards of living.

Reconfigurable Switched-Capacitor Power Converters

Author : Dongsheng Ma
Publisher : Springer Science & Business Media
ISBN 13 : 1461441870
Total Pages : 182 pages
Book Rating : 4.4/5 (614 download)

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Book Synopsis Reconfigurable Switched-Capacitor Power Converters by : Dongsheng Ma

Download or read book Reconfigurable Switched-Capacitor Power Converters written by Dongsheng Ma and published by Springer Science & Business Media. This book was released on 2012-07-25 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides readers specializing in ultra-low power supply design for self-powered applications an invaluable reference on reconfigurable switched capacitor power converters. Readers will benefit from a comprehensive introduction to the design of robust power supplies for energy harvesting and self-power applications, focusing on the use of reconfigurable switched capacitor based DC-DC converters, which is ideal for such applications. Coverage includes all aspects of switched capacitor power supply designs, from fundamentals, to reconfigurable power stages, and sophisticated controller designs.

NASA Technical Memorandum

Author :
Publisher :
ISBN 13 :
Total Pages : 200 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis NASA Technical Memorandum by :

Download or read book NASA Technical Memorandum written by and published by . This book was released on 1982 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Large Space Structures & Systems in the Space Station Era

Author :
Publisher :
ISBN 13 :
Total Pages : 368 pages
Book Rating : 4.3/5 ( download)

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Book Synopsis Large Space Structures & Systems in the Space Station Era by :

Download or read book Large Space Structures & Systems in the Space Station Era written by and published by . This book was released on 1993 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

ERDA Energy Research Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 742 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis ERDA Energy Research Abstracts by :

Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1977 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy: a Continuing Bibliography with Indexes

Author :
Publisher :
ISBN 13 :
Total Pages : 616 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Energy: a Continuing Bibliography with Indexes by :

Download or read book Energy: a Continuing Bibliography with Indexes written by and published by . This book was released on 1976 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy

Author :
Publisher :
ISBN 13 :
Total Pages : 616 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Energy by :

Download or read book Energy written by and published by . This book was released on 1980 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advanced Data Converters

Author : Gabriele Manganaro
Publisher : Cambridge University Press
ISBN 13 : 1139504746
Total Pages : 251 pages
Book Rating : 4.1/5 (395 download)

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Book Synopsis Advanced Data Converters by : Gabriele Manganaro

Download or read book Advanced Data Converters written by Gabriele Manganaro and published by Cambridge University Press. This book was released on 2011-11-17 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Need to get up to speed quickly on the latest advances in high performance data converters? Want help choosing the best architecture for your application? With everything you need to know about the key new converter architectures, this guide is for you. It presents basic principles, circuit and system design techniques and associated trade-offs, doing away with lengthy mathematical proofs and providing intuitive descriptions upfront. Everything from time-to-digital converters to comparator-based/zero-crossing ADCs is covered and each topic is introduced with a short summary of the essential basics. Practical examples describing actual chips, along with extensive comparison between architectural or circuit options, ease architecture selection and help you cut design time and engineering risk. Trade-offs, advantages and disadvantages of each option are put into perspective with a discussion of future trends, showing where this field is heading, what is driving it and what the most important unanswered questions are.

Dissertation Abstracts International

Author :
Publisher :
ISBN 13 :
Total Pages : 800 pages
Book Rating : 4.F/5 ( download)

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Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems

Author : Vijay Nath
Publisher : Springer Nature
ISBN 13 : 981155546X
Total Pages : 1078 pages
Book Rating : 4.8/5 (115 download)

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Book Synopsis Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems by : Vijay Nath

Download or read book Proceedings of the Fourth International Conference on Microelectronics, Computing and Communication Systems written by Vijay Nath and published by Springer Nature. This book was released on 2020-09-19 with total page 1078 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents high-quality papers from the Fourth International Conference on Microelectronics, Computing & Communication Systems (MCCS 2019). It discusses the latest technological trends and advances in MEMS and nanoelectronics, wireless communication, optical communication, instrumentation, signal processing, image processing, bioengineering, green energy, hybrid vehicles, environmental science, weather forecasting, cloud computing, renewable energy, RFID, CMOS sensors, actuators, transducers, telemetry systems, embedded systems and sensor network applications. It includes papers based on original theoretical, practical and experimental simulations, development, applications, measurements and testing. The applications and solutions discussed here provide excellent reference material for future product development.

ERDA Energy Research Abstracts

Author : United States. Energy Research and Development Administration
Publisher :
ISBN 13 :
Total Pages : 1030 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 1030 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Handbook on Battery Energy Storage System

Author : Asian Development Bank
Publisher : Asian Development Bank
ISBN 13 : 9292614711
Total Pages : 123 pages
Book Rating : 4.2/5 (926 download)

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Book Synopsis Handbook on Battery Energy Storage System by : Asian Development Bank

Download or read book Handbook on Battery Energy Storage System written by Asian Development Bank and published by Asian Development Bank. This book was released on 2018-12-01 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook serves as a guide to deploying battery energy storage technologies, specifically for distributed energy resources and flexibility resources. Battery energy storage technology is the most promising, rapidly developed technology as it provides higher efficiency and ease of control. With energy transition through decarbonization and decentralization, energy storage plays a significant role to enhance grid efficiency by alleviating volatility from demand and supply. Energy storage also contributes to the grid integration of renewable energy and promotion of microgrid.

Tailoring the Emission of Stripe-array Diode Lasers with External Cavities to Enable Nonlinear Frequency Conversion

Author : Andreas Jechow
Publisher : Universitätsverlag Potsdam
ISBN 13 : 3869560312
Total Pages : 152 pages
Book Rating : 4.8/5 (695 download)

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Book Synopsis Tailoring the Emission of Stripe-array Diode Lasers with External Cavities to Enable Nonlinear Frequency Conversion by : Andreas Jechow

Download or read book Tailoring the Emission of Stripe-array Diode Lasers with External Cavities to Enable Nonlinear Frequency Conversion written by Andreas Jechow and published by Universitätsverlag Potsdam. This book was released on 2009 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: A huge number of applications require coherent radiation in the visible spectral range. Since diode lasers are very compact and efficient light sources, there exists a great interest to cover these applications with diode laser emission. Despite modern band gap engineering not all wavelengths can be accessed with diode laser radiation. Especially in the visible spectral range between 480 nm and 630 nm no emission from diode lasers is available, yet. Nonlinear frequency conversion of near-infrared radiation is a common way to generate coherent emission in the visible spectral range. However, radiation with extraordinary spatial temporal and spectral quality is required to pump frequency conversion. Broad area (BA) diode lasers are reliable high power light sources in the near-infrared spectral range. They belong to the most efficient coherent light sources with electro-optical efficiencies of more than 70%. Standard BA lasers are not suitable as pump lasers for frequency conversion because of their poor beam quality and spectral properties. For this purpose, tapered lasers and diode lasers with Bragg gratings are utilized. However, these new diode laser structures demand for additional manufacturing and assembling steps that makes their processing challenging and expensive. An alternative to BA diode lasers is the stripe-array architecture. The emitting area of a stripe-array diode laser is comparable to a BA device and the manufacturing of these arrays requires only one additional process step. Such a stripe-array consists of several narrow striped emitters realized with close proximity. Due to the overlap of the fields of neighboring emitters or the presence of leaky waves, a strong coupling between the emitters exists. As a consequence, the emission of such an array is characterized by a so called supermode. However, for the free running stripe-array mode competition between several supermodes occurs because of the lack of wavelength stabilization. This leads to power fluctuations, spectral instabilities and poor beam quality. Thus, it was necessary to study the emission properties of those stripe-arrays to find new concepts to realize an external synchronization of the emitters. The aim was to achieve stable longitudinal and transversal single mode operation with high output powers giving a brightness sufficient for efficient nonlinear frequency conversion. For this purpose a comprehensive analysis of the stripe-array devices was done here. The physical effects that are the origin of the emission characteristics were investigated theoretically and experimentally. In this context numerical models could be verified and extended. A good agreement between simulation and experiment was observed. One way to stabilize a specific supermode of an array is to operate it in an external cavity. Based on mathematical simulations and experimental work, it was possible to design novel external cavities to select a specific supermode and stabilize all emitters of the array at the same wavelength. This resulted in stable emission with 1 W output power, a narrow bandwidth in the range of 2 MHz and a very good beam quality with M²<1.5. This is a new level of brightness and brilliance compared to other BA and stripe-array diode laser systems. The emission from this external cavity diode laser (ECDL) satisfied the requirements for nonlinear frequency conversion. Furthermore, a huge improvement to existing concepts was made. In the next step newly available periodically poled crystals were used for second harmonic generation (SHG) in single pass setups. With the stripe-array ECDL as pump source, more than 140 mW of coherent radiation at 488 nm could be generated with a very high opto-optical conversion efficiency. The generated blue light had very good transversal and longitudinal properties and could be used to generate biphotons by parametric down-conversion. This was feasible because of the improvement made with the infrared stripe-array diode lasers due to the development of new physical concepts.