Highly Integrated Switched Mode Power Converters Employing Cmos And Gan Technologies For Distributed Mppt
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Highly Integrated Switched Mode Power Converters Employing Cmos And Gan Technologies For Distributed Mppt
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Author : Kiran Kumar Krishnan Achary
language : en
Publisher:
Release Date : 2015
Highly Integrated Switched Mode Power Converters Employing Cmos And Gan Technologies For Distributed Mppt written by Kiran Kumar Krishnan Achary and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Electric current converters categories.
The photovoltaic systems used to convert solar energy to electricity pose a multitude of design and implementation challenges, including energy conversion efficiency, partial shading effects, and power converter efficiency. Using power converters for Distributed Maximum Power Point Tracking (DMPPT) is a well-known architecture to significantly reduce power loss associated with mismatched panels. Sub-panel-level DMPPT is shown to have up to 14.5% more annual energy yield than panel-level DMPPT, and requires an efficient medium power converter.This research aims at implementing a highly efficient power management system at sub-panel level with focus on system cost and form-factor. Smaller form-factor motivates increased converter switching frequencies to significantly reduce the size of converter passives and substantially improve transient performance. But, currently available power MOSFETs put a constraint on the highest possible switching frequency due to increased switching losses. The solution is Gallium Nitride based power devices, which deliver figure of merit (FOM) performance at least an order of magnitude higher than existing silicon MOSFETs. Low power loss, high power density, low cost and small die sizes are few of the qualities that make e-GaN superior to its Si counterpart. With careful design, e-GaN can enable a 20-30% improvement in power stage efficiency compared to converters using Si MOSFETs. The main objective of this research is to develop a highly integrated, high efficiency, 20MHz, hybrid GaN-CMOS DC-DC MPPT converter for a 12V/5A sub-panel. Hard and soft switching boost converter topologies are investigated within this research, and an innovative CMOS gate drive technique for efficiently driving an e-GaN power stage is presented in this work. The converter controller also employs a fast converging analog MPPT control technique.
Integrated Switching Dc Dc Converters With Hybrid Control Schemes
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Author :
language : en
Publisher:
Release Date : 2009
Integrated Switching Dc Dc Converters With Hybrid Control Schemes written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
In the modern world of technology, highly sophisticated electronic systems pave the way for future's information technology breakthroughs. However, rapid growth on complexity and functions in such systems has also been a harbinger for the power increase. Power management techniques have thus been introduced to mitigate this urgent power crisis. Switching power converters are considered to be the best candidate due to their high efficiency and voltage conversion flexibility. Moreover, switching power converter systems are highly nonlinear, discontinuous in time, and variable. This makes it viable over a wide operating range, under various load and line disturbances. However, only one control scheme cannot optimize the whole system in different scenarios. Hybrid control schemes are thus employed in the power converters to operate jointly and seamlessly for performance optimization during start-up, steady state and dynamic voltage/load transient state. In this dissertation, three switching power converter topologies, along with different hybrid control schemes are studied. First, an integrated switching buck converter with a dual-mode control scheme is proposed. A pulse-train (PT) control, employing a combination of four pulse control patterns, is proposed to achieve optimal regulation performance. Meanwhile, a high-frequency pulse-width modulation (PWM) control is adopted to ensure low output ripples and avoid digital limit cycling. Second, an integrated buck-boost converter with a tri-mode digital control is presented. It employs adaptive step-up/down voltage conversion to enable a wide range of output voltage. This is beneficial to ever-increasing dynamic voltage scaling (DVS) enabled, modern power-efficient VLSI systems. DVS adaptively adjusts the supply voltage and operation frequency according to instantaneous power and performance demand, such that a system is constantly operated at the lowest possible power level without compromising its performance. Third, a digital integrated single-inductor multiple-output (SIMO) converter, tailored for DVS-enabled multicore systems is addressed. With a multi-mode control algorithm, DVS tracking speed and line/load regulation are significantly improved, while the converter still retains 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.
Fully Integrated Switching Power Converters In Silicon Carbide Technology
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Author : Hua Zhang
language : en
Publisher:
Release Date : 2022
Fully Integrated Switching Power Converters In Silicon Carbide Technology written by Hua Zhang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Power electronics categories.
Silicon Carbide (SiC) technology offers notable advantages over standard Silicon (Si) technology in terms of its high-voltage and high-temperature capabilities. These advantages make SiC a prime technology for implementing high voltage switching power converters. However, existing power converter solutions utilize SiC technology only for the realization of the high-voltage power switches, while the low-voltage analog and mixed-signal control circuitry continues to be realized in standard CMOS Silicon technology. As a result, multiple chips in different technologies are required, which significantly increases the cost, footprint, and complexity of the power converter. Moreover, in applications where the power converter must tolerate high temperature, such approach would require physical separation between the low-voltage control circuitry implemented in the Si chip and the high-voltage power stage implemented in the SiC chip, which is often unfeasible. In this research work, two versions of fully integrated switching power converters (specifically Buck converters) using a new SiC technology are presented. The Buck converters integrate the low-voltage analog and mixed-signal control circuitry and the high-voltage power stage together in a single SiC wafer, which allows for a single-chip power converter solution. The low-voltage control circuitry includes analog building blocks, such as error amplifiers, comparators, and oscillators, along with digital complementary metal-oxide-semiconductor (CMOS) logic gates, while the high-voltage power stage includes power switches and gate drivers. The differences between two versions of the Buck converter are the circuit topologies applied in the error amplifiers, and comparators and the gate drivers. The SiC process is a new 600V process with 500nm feature size and is being co-developed with the proposed Buck converter design. Therefore, the first goal of the work is to develop accurate models of the low-voltage and high-voltage devices in the technology to facilitate the circuit design and simulation of the converter. The development of these models is based on Level-3 SPICE parameters, which are manually adjusted to fit the Current/Voltage curves produced by the characterization of the devices. Based on these models, all building blocks in the fully integrated Buck converters have been designed and simulated. Furthermore, in order to verify the fully integrated Buck converters after fabrication, the corresponding physical design has to be implemented. Therefore, the parameterized cells of the low-voltage CMOS transistors are created by following the design rule from the foundry to enable automatically generating the devices of the same type while with various dimensions and the standard library consisting of simple digital gates are built to facilitate the digital circuit design in the low-voltage control circuitry of the converters. Based on these Pcells and the standard library, two versions of Buck converter have been laid out and are currently in fabrication. Data from the characterization of devices and the evaluation of the fully integrated Buck converters will be used to further enhance the accuracy of SPICE models and to enlighten the full integration of other power converters and power systems by employing the proposed SiC technology.
Switched Capacitor Based Dc Dc Converter With Ultra High Efficiency Power Density And Voltage Regulation Capability
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Author : Deepak Gunasekaran
language : en
Publisher:
Release Date : 2018
Switched Capacitor Based Dc Dc Converter With Ultra High Efficiency Power Density And Voltage Regulation Capability written by Deepak Gunasekaran and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Electronic dissertations categories.
Architectures And Circuits For Low Voltage Energy Conversion And Applications In Renewable Energy And Power Management
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Author : Robert C. N. Pilawa-Podgurski
language : en
Publisher:
Release Date : 2012
Architectures And Circuits For Low Voltage Energy Conversion And Applications In Renewable Energy And Power Management written by Robert C. N. Pilawa-Podgurski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
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.
Gan Transistors For Efficient Power Conversion
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Author : Alex Lidow
language : en
Publisher: John Wiley & Sons
Release Date : 2019-08-12
Gan Transistors For Efficient Power Conversion written by Alex Lidow and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-12 with Science categories.
An up-to-date, practical guide on upgrading from silicon to GaN, and how to use GaN transistors in power conversion systems design This updated, third edition of a popular book on GaN transistors for efficient power conversion has been substantially expanded to keep students and practicing power conversion engineers ahead of the learning curve in GaN technology advancements. Acknowledging that GaN transistors are not one-to-one replacements for the current MOSFET technology, this book serves as a practical guide for understanding basic GaN transistor construction, characteristics, and applications. Included are discussions on the fundamental physics of these power semiconductors, layout, and other circuit design considerations, as well as specific application examples demonstrating design techniques when employing GaN devices. GaN Transistors for Efficient Power Conversion, 3rd Edition brings key updates to the chapters of Driving GaN Transistors; Modeling, Simulation, and Measurement of GaN Transistors; DC-DC Power Conversion; Envelope Tracking; and Highly Resonant Wireless Energy Transfer. It also offers new chapters on Thermal Management, Multilevel Converters, and Lidar, and revises many others throughout. Written by leaders in the power semiconductor field and industry pioneers in GaN power transistor technology and applications Updated with 35% new material, including three new chapters on Thermal Management, Multilevel Converters, Wireless Power, and Lidar Features practical guidance on formulating specific circuit designs when constructing power conversion systems using GaN transistors A valuable resource for professional engineers, systems designers, and electrical engineering students who need to fully understand the state-of-the-art GaN Transistors for Efficient Power Conversion, 3rd Edition is an essential learning tool and reference guide that enables power conversion engineers to design energy-efficient, smaller, and more cost-effective products using GaN transistors.
Gan Power Devices And Applications
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Author : Alex Lidow
language : en
Publisher:
Release Date : 2021-10
Gan Power Devices And Applications written by Alex Lidow and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-10 with categories.
GaN Power Devices and Applications, provides an update on gallium nitride (GaN) technology and applications by leading experts. It includes detailed descriptions of the latest examples of GaN's usage in power supplies, lidar systems, motor drives, and space applications.
Active Power Line Conditioners
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Author : Patricio Salmeron Revuelta
language : en
Publisher: Academic Press
Release Date : 2015-07-31
Active Power Line Conditioners written by Patricio Salmeron Revuelta and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-07-31 with Technology & Engineering categories.
Active Power Line Conditioners: Design, Simulation and Implementation for Improving Power Quality presents a rigorous theoretical and practical approach to active power line conditioners, one of the subjects of most interest in the field of power quality. Its broad approach offers a journey that will allow power engineering professionals, researchers, and graduate students to learn more about the latest landmarks on the different APLC configurations for load active compensation. By introducing the issues and equipment needs that arise when correcting the lack of power quality in power grids, this book helps define power terms according to the IEEE Standard 1459. Detailed chapters discuss instantaneous reactive power theory and the theoretical framework that enabled the practical development of APLCs, in both its original and modified formulations, along with other proposals. Different APLCs configurations for load compensation are explored, including shunt APF, series APF, hybrid APF, and shunt combined with series APF, also known as UPQC. The book includes simulation examples carefully developed and ready for download from the book’s companion website, along with different case studies where real APLCs have been developed. Finally, the new paradigm brought by the emergence of distribution systems with dispersed generation, such as the use of small power units based on gas technology or renewable energy sources, is discussed in a chapter where mitigation technologies are addressed in a distributed environment. Combines the development of theories, control strategies, and the most widespread practical implementations of active power line conditioners, along with the most recent new approaches Details updated and practical content on periodic disturbances mitigation technologies with special emphasis on distributed generation systems Includes over 28 practical simulation examples in Matlab-Simulink which are available for download at the book’s companion website, with 4 reproducible case studies from real APLCs
Photon Counting Image Sensors
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Author : Eric R. Fossum
language : en
Publisher: MDPI
Release Date : 2018-07-06
Photon Counting Image Sensors written by Eric R. Fossum and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-07-06 with categories.
This book is a printed edition of the Special Issue "Photon-Counting Image Sensors" that was published in Sensors
Power Electronics And Motor Drive Systems
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Author : Stefanos Manias
language : en
Publisher: Academic Press
Release Date : 2016-11-08
Power Electronics And Motor Drive Systems written by Stefanos Manias and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-08 with Technology & Engineering categories.
Power Electronics and Motor Drive Systems is designed to aid electrical engineers, researchers, and students to analyze and address common problems in state-of-the-art power electronics technologies. Author Stefanos Manias supplies a detailed discussion of the theory of power electronics circuits and electronic power conversion technology systems, with common problems and methods of analysis to critically evaluate results. These theories are reinforced by simulation examples using well-known and widely available software programs, including SPICE, PSIM, and MATLAB/SIMULINK. Manias expertly analyzes power electronic circuits with basic power semiconductor devices, as well as the new power electronic converters. He also clearly and comprehensively provides an analysis of modulation and output voltage, current control techniques, passive and active filtering, and the characteristics and gating circuits of different power semiconductor switches, such as BJTs, IGBTs, MOSFETs, IGCTs, MCTs and GTOs. Includes step-by-step analysis of power electronic systems Reinforced by simulation examples using SPICE, PSIM, and MATLAB/SIMULINK Provides 110 common problems and solutions in power electronics technologies