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Design Techniques Of Highly Integrated Hybrid Switched Capacitor Resonant Power Converters For Led Lighting Applications
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Book Synopsis Design Techniques of Highly Integrated Hybrid-Switched-Capacitor-Resonant Power Converters for LED Lighting Applications by : Chengrui Le
Download or read book Design Techniques of Highly Integrated Hybrid-Switched-Capacitor-Resonant Power Converters for LED Lighting Applications written by Chengrui Le and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Its functional performance indicates that integrated multilevel converters are a viable topology for lighting and other similar applications.
Book Synopsis Hybrid Switched-capacitor Power Converter Techniques by : Nathan Miles Ellis
Download or read book Hybrid Switched-capacitor Power Converter Techniques written by Nathan Miles Ellis and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power conversion is a necessity in almost all modern electric systems and machines: energy must be regulated and delivered in the intended manner if a system is to perform well, or at all. Power converters, the electronic circuits used to control this energy flow, have been a subject of intense study and rapid development in recent years and are widely acknowledged to be a fundamental enabler for modern day human societal capabilities. Many market sectors have strongly advocated for further development of energy conversion systems with improved efficiency and power density as these traits often directly dictate practical viability. While advancements in semiconductor device physics have yielded improved parts for use inconverter solutions, it is becoming apparent that there is additional massive potential and merit in revisiting fundamental converter topologies and circuit techniques. To date, power converters that use capacitors as their primary energy transfer elements (termed "switchedcapacitor" power converters) are far less ubiquitous than their switched-inductor counterparts, and seemingly for good reason: characteristics such as poor output regulation and intrinsic transient inrush currents that lead to inefficiency have largely prevented switched-capacitor topologies from gaining practical consideration in general power converter markets. Solutions to these negative attributes are strongly desired as capacitors can offer energy densities up to three orders of magnitude greater than inductors, with these energy transfer elements typically consuming the majority of a power converter's weight/volume. Recent work has demonstrated significant potential for hybrid switched-capacitor-inductor converter techniques: here, small inductive element(s) are used to eliminate the conventional drawbacks of a converter which is predominantly capacitor based. The hybridized approach helps unlock the full potential of capacitor-based converters and has been demonstrated to offer compelling results at the cost of added complexity. This work offers an exploration into a collection of state-of-the-art power converter techniques and topological methods, primarily within the field of hybridized switched-capacitor-inductor converters. The first two chapters give a background on fundamental considerations such as conventional loss mechanisms and the slow-switching-limit (SSL), as well as several established loss mitigation techniques. An integrated converter system and its associated functional blocks is then discussed in Chapters 3 and 4, exemplifying a hybridized two-stage converter and illustrating the implementation of several loss mitigation methods and practical circuit techniques. Next, several hybridized variations of the Dickson topology are discussed: this family of DC-DC converters is well suited for non-isolated large voltage conversion ratios. A number of these variants are proposed here for the first time, illustrating significant potential for further converter development. The steady-state bias points, resonant switching frequency, duty cycle and voltage ripple as a function of load are calculated for several example converters, including the non-trivial case of a converter undergoing split-phase operation and whose operating points exhibit a strong load dependence. To facilitate comparative analysis between topologies, a mathematical method is presented that characterizes the total energy density utilization of fly capacitors throughout a converter, accounting for large voltage ripple and iii highly nonlinear reverse-bias transitions. This analysis assists with optimal topology selection as energy density utilization directly dictates the required capacitor volume at a specified power level and switching frequency. An expanded family of fly capacitor networks is then introduced in Chapter 6; here it is shown that there are a large number of unexplored yet practical fly capacitor configurations that are eligible for use in hybridized converters. It is calculated that a 6-7 % reduction in capacitor volume can be achieved relative to conventional Dickson fly capacitor networks, while preserving the desirable characteristic of equal voltage ripple on its branches. N-phase and split-phase switching methods and their respective trade-offs are then discussed in detail, offering control techniques that allow a departure from conventional two-phase operation while retaining high-efficiency zero-voltage and zero-current switching (ZVS/ZCS) conditions. A Cockcroft-Walton prototype demonstrates both methods implemented on the same piece of hardware, significantly improving the efficiency range with respect to load and resulting in a state-of-the-art power density of 483.3 kW/liter (7, 920W/inch3). Next, a method termed "resonant charge redistribution" (RCR) is proposed that greatly reduces output capacitance (C[subscript OSS]) related switching losses in all switches of a complex switched-capacitor network. Despite little effort being put towards optimization, a prototype using RCR measures a 61 % reduction in total losses at light load for a near negligible 0.74 % increase in total solution volume. Lastly, resonant gate drive techniques are discussed. Here, within a proposed resonant gate-driver topology, a capacitive decoupling technique is demonstrated that allows power to be delivered to a "flying" high-side N-channel device which commutes between two variable voltages. The implemented prototype achieves up to a 72 % reduction in gating loss when switching over 20 MHz and with rise/fall times ≤ 7 ns. Combining several of the novel techniques described herein can result in near complete mitigation of all primary switching loss mechanisms observed throughout the complex structure of a switched-capacitor converter network. This relatively new field of hybridized converter design has already yielded converters with record-breaking performance, as is demonstrated here. With contemporary techniques, including those described in this work, the field of power electronics is on the cusp of seeing widespread dramatic improvements in energy handling capability, power density, specific power and efficiency at reduced cost, with huge potential for growth and improved energy consumption in both developed and emerging markets.
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.
Book Synopsis Resonant Power Converters by : Marian K. Kazimierczuk
Download or read book Resonant Power Converters written by Marian K. Kazimierczuk and published by John Wiley & Sons. This book was released on 2012-11-07 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to resonant energy conversion in power electronics. It is a practical, systematic guide to the analysis and design of various dc-dc resonant inverters, high-frequency rectifiers, and dc-dc resonant converters that are building blocks of many of today's high-frequency energy processors. Designed to function as both a superior senior-to-graduate level textbook for electrical engineering courses and a valuable professional reference for practicing engineers, it provides students and engineers with a solid grasp of existing high-frequency technology, while acquainting them with a number of easy-to-use tools for the analysis and design of resonant power circuits. Resonant power conversion technology is now a very hot area and in the center of the renewable energy and energy harvesting technologies.
Book Synopsis The Art of Voltage Boosting Part I by : Bin Wu
Download or read book The Art of Voltage Boosting Part I written by Bin Wu and published by . This book was released on 2016 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voltage boosting is required in many energy conversion applications, ranging from front-end solar energy system to Medium-Voltage DC (MVDC)-grid system, and from headlamp ballast of automobile to fuel cell powered system. This dissertation is dedicated to the development of voltage boosting technology. New circuits were found both in switched capacitor converters and inductor-based power converters. The former has the potential of full integration while the latter has combined the merits of conventional magnetic components and switched capacitor stages, leading to a new hybrid converter category. These contributions are captured in two major parts respectively: The first part discusses the switched capacitor converters and new discovery in voltage boosting technology as well as modeling technique. The second part introduces a number of new topologies and extensions in hybrid boosting converters.Part I.Switched Capacitor Converter (SCC) is a special branch of power electronics converters which is composed of capacitors and switches without the participation of inductors/transformers. It potentially has lower electromagnetic interference (EMI), lighter weight, lower cost, higher energy density, and the promise for full integration.In this part, a family of "Two-switch Boosting Switched-capacitor Converters (TBSC)" is introduced, which distinguishes itself from the prior arts by its symmetrical interleaved operation, reduced output ripple, low yet even voltage stress on components, and systematic expandability. Along with the topologies, a modeling technique based on charge-balance transient-calculation is formulated, which provokes the converter regulation method through duty cycle and frequency adjustment. The design guideline for high efficient TBSC is provided and regulation under high power condition is explored.In addition, an enhanced accurate modeling technique considering the output capacitor effect is developed for simple two-phase SC converters.Part II.Built upon the momentum of the "Two-switch Boosting Switched-capacitor Converters (TBSC)" circuit structure, another family of Hybrid Boosting Converters (HBC) is developed, featuring wide regulation range, symmetrical configuration, low component voltage stress, small output voltage ripple, and expandable structure. It integrates the inductive switching cores of various functionalities and control strategies with Bipolar Voltage Multiplier (BVM), resulting in the new breed of hybrid converters: Hybrid Boosting Converters (HBC). The proposed HBC family includes the basic HBC, symmetrical HBC, Isolated HBC, and tapped inductor HBC, all of which are analyzed in details and design considerations are provided.In addition, the 3D DC-DC converter concept for high power application, inverter configuration and DC micro-grid based on HBC converters are developed.The proposed HBCs are applicable in many areas such HID lamp driver, X-ray system, ion pumps, front-end photovoltaic energy system, and energy storage systems.
Book Synopsis Emerging Power Converters for Renewable Energy and Electric Vehicles by : Md Rabiul Islam
Download or read book Emerging Power Converters for Renewable Energy and Electric Vehicles written by Md Rabiul Islam and published by CRC Press. This book was released on 2021-04-22 with total page 411 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers advancements of power electronic converters and their control techniques for grid integration of large-scale renewable energy sources and electrical vehicles. Major emphasis are on transformer-less direct grid integration, bidirectional power transfer, compensation of grid power quality issues, DC system protection and grounding, interaction in mixed AC/DC system, AC and DC system stability, magnetic design for high-frequency high power density systems with advanced soft magnetic materials, modelling and simulation of mixed AC/DC system, switching strategies for enhanced efficiency, and protection and reliability for sustainable grid integration. This book is an invaluable resource for professionals active in the field of renewable energy and power conversion.
Book Synopsis Analysis and Design of Hybrid Divided Power Converters by : Timothy Gerard McRae
Download or read book Analysis and Design of Hybrid Divided Power Converters written by Timothy Gerard McRae and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, we report a design methodology for the combination of switched-capacitor (SC) and conventional inductive switch-mode power supplies (SMPS) into new power converters, so-called Hybrid Divided-Power (HDP) converters. These converters present an opportunity to reduce volume while also increasing power processing efficiency by utilizing the increased power density of SC converters and parallelizing power processing to reduce both passive volume and switch blocking voltage. The thesis places these converters in the emerging field of hybrid power converters, a class of converters which combine SC converters and conventional inductive converters. The main results include a switched capacitor converter design methodology based on efficiency and ripple requirements and the principle of operation and design of HDP converters. Two novel converters based on the stacked HDP configuration for LED driving applications are shown. The design of a third novel converter based on the differential HDP configuration is also shown. This differential HDP converter is a multiple output LED driver for mobile applications. A current balancing technique based on charge matching is developed for the converter. Practical experimental results from these novel topologies confirm reduction in passive volume around 70% compared to conventional topologies while also increasing efficiency over the whole range. In particular light-load efficiency is improved up to 20%. The efficacy of the charge matching control presented in this thesis is confirmed through simulation results, achieving matching within 2% over the operating range. This work indicates that HDP converters are a promising new class of converters to investigate.
Book Synopsis Switched-capacitor Featured Integrated Power Circuit Design for Next-generation Power Management by : Kang Wei
Download or read book Switched-capacitor Featured Integrated Power Circuit Design for Next-generation Power Management written by Kang Wei and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid proliferation of Internet of Things (IoTs), automotive and consumer electronics establishes strong demands on small system volume, low energy consumption and high level of security. As a key part of these electronic systems, this drives the power electronics to be unprecedentedly compact, efficient and reliable. Consequently, switched-capacitor (SC) power circuits, as an unique family of power electronic circuits, have seen their promising roles in improving power density, adaptability and design flexibility. However, severe design challenges such as power passive implementations, substantial on-die power loss and critical chip activities leakage must be addressed thoroughly. Accordingly, a set of SC featured integrated power circuits are presented in this dissertation to address the above challenges, which have tremendous significance for next-generation power management. Firstly, a reconfigurable three-stage SC DC-DC converter is proposed to extend input range for wireless sensor applications. A three-stage SC topology is constructed by using four fundamental 2:1 SC unit cells to realize eight step-down and step-up conversion ratios with series, parallel and series-parallel configurations while retaining low complexity. A bootstrap rail sharing technique is introduced to implement highly efficient and self-powered gate drivers for power switches. An adaptive pulse emulated hysteretic control improves load transient response and adjusts quiescent power adaptively with frequency-dependent biasing technique. Secondly, a monolithic tri-state SC DC-DC converter is designed for high power density in IoT devices. A tri-state SC topology is presented to reduce voltage stresses on power switches, enhance integrated MOS capacitance density and lower switching noise. It enhances power delivery greatly while achieving decent efficiency with on-die power loss reduction. Two-dimensional multiplechannel interleaving operation increases the equivalent switching frequency largely to further reduce switching noise and improves light-load efficiency with active channel modulation. Thirdly, a high step-down ratio hybrid SC DC-DC converter is developed in this dissertation. The proposed converter adopts the front-end SC power circuits to withstand high input voltage stress and lower switching node voltages in the following inductive topology. Thus, the on-duty time of the converter is extended, and low voltage power devices are used for efficient and fast switching. The online flying capacitor voltage (VCF) rebalancing scheme adaptively adjusts the charge and discharge times of flying capacitors to minimize power mismatch and improve device reliability in steady state. The in-situ precharge rate regulation technique precisely controls two different charge rates of flying capacitors at the start-up, avoiding power device breakdown. Lastly, this dissertation presents an SC-assisted power cipher to improve hardware security against power side-channel attacks. With a SC charge reshaper, the proposed power cipher adopts random charge shaping technique to only encrypt input power profile by using noise injection, supply masking and switching randomization. A parallel encryption interface is designed to manage the interactions between power and security strictly without shoot-through current and regulate the charge reshaper with random ON-time control for minimal power and performance overhead. In this dissertation, the first reconfigurable three-stage SC DC-DC converter is implemented and verified with fully transistor-level HSPICE simulations and the other three SC featured integrated power circuits are fabricated on silicon and measured to successfully validate proposed converter topologies and operation schemes. These experimental results provide strong evidences that the SC power circuits can be integrated as an essential part of next-generation power management strategically to achieve optimal performances among power density, efficiency and security design matrix.
Book Synopsis Topologies, Modeling, and Control of Hybrid Switched-Capacitor Converters by : Ratul Das
Download or read book Topologies, Modeling, and Control of Hybrid Switched-Capacitor Converters written by Ratul Das and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation explored the ideas and concepts for hybrid switched capacitor converter topologies and new power delivery architectures to provide viable solutions for high conversion ratio DC-DC and AC-DC applications. A new Multi Inductor Hybrid (MIH) Converter family for high conversion ratio DC-DC applications has been synthesized and analyzed to provide non-isolated DC-DC conversions with large voltage conversion ratios efficiently. The highlight of this converter family is a 6-level 6-phase 6-inductor MPMIH converter, which achieved 90.7% peak efficiency with a load range of 0-220A at 1V and 1kA/in3 density. A new modeling method reveals that all odd-level Flying Capacitor Multi-Level converters become current sources with non-ideal timing while the even-level converters stay as voltage sources. A method for identifying unbalanced hybrid converters is also provided. This dissertation demonstrates a two-stage power delivery architecture to bridge AC distribution voltages to core levels for computing loads in data centers. In combination, direct conversion from ~110 VAC to 1VDC achieves a peak efficiency of 84.1% while providing output currents up to 160A. Partial power processing for AC/DC applications has been explored with a switched-capacitor (SC) based hybrid step-down converter and its new control techniques. The operation with multiple modules is verified with a 115VAC-to-48VDC conversion and 200VAC input to two 48VDC outputs. A new modular isolated DC-DC converter is proposed and demonstrated for point-pf-load (POL) applications with partial power processing. A prototype of the modular architecture has been demonstrated for a 100V-to-3V point-of-load conversion with a maximum load of 60A. The peak efficiency of 91% is achieved at 57W/20A output. A new multi-inductor multi-output hybrid converter is also proposed and demonstrated. The MiMoH converter prototype has been implemented to demonstrate conversion from a 24-48V input voltage to three individually regulated outputs ranging from 1.2V to 2.2V. The converter prototype achieves 40W peak power and 91.8% peak efficiency. The topologies presented in this dissertation, corroborated with control and modeling techniques, demonstrated superior performance, natural balancing ability, and relatively easy controllability, making them excellent candidates for more compact and efficient system design.
Book Synopsis Resonant and Multi-mode Operation of Inductive Switched Capacitor Converters by : Kapil Kesarwani
Download or read book Resonant and Multi-mode Operation of Inductive Switched Capacitor Converters written by Kapil Kesarwani and published by . This book was released on 2015 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: While efficiency has always been an important metric for power electronics, power density is growing in importance as driven by a variety of applications including performance and mobile computing, renewable energy and automotive applications. The drive towards higher power density generally requires operation at very high frequency which allows miniaturization of passive components, especially inductors, which occupy a large fraction of the total volume. However, the aggressive scaling of frequency leads to moderate efficiency of such converters due to increase in frequency dependent losses. It is therefore desirable to explore DC-DC conversion techniques which lead to lower passive component volume at low to moderate frequencies of operation. This thesis explores resonant and multi-mode operation of inductive Switched Capacitor (SC) converters for high efficiency, high power density converters. A loss model of the resonant operation of a 2:1 indirect Resonant SC (ReSC) converter is developed and compared to the loss model of a 2:1 Switched Capacitor (SC) converter. These loss models are used to compare SC and ReSC converter classes in the efficiency versus power density space using representative passive component and process technology models. A novel technique referred to as Dynamic Off Time Modulation (DOTM) is presented. This technique allows linear scaling of the output impedance of ReSC converters which enables linear regulation of these converters and maintains peak efficiency in light load conditions. For experimental verification, an integrated circuit design based on this model is completed in a 0.18 [mu]m CMOS process and the results from this chip are presented. An alternative direct topology for performing resonant conversion is explored and its advantages over the indirect topology, discussed earlier, are presented. Experimental verification from a 24 V: 12 V converter is presented. It is shown that resonant, DOTM and non-resonant modes of operation for the direct topology improve its efficiency over a wide output current range. This multi-mode operation of the direct topology allows unification of the resonant and soft-charging approach to solve charge sharing loss problem of the SC converter. Supporting experimental results from a 24 V: 12 V converter are presented. The direct topology which is derived from a 3-level converter topology fits into the general class of inductive SC converters. It is shown that inductive SC converters can achieve regulation by addition of extra states into the converter operation. It is shown that this mode of operation leads to unconstrained flying capacitor voltage problems in a general inductive SC converter; similar to the unconstrained flying capacitor voltage problems observed in 3-level converters and therefore inductive SC converters require active control of flying capacitor voltages for safe operation. Finally, flying capacitor multi-level (FCML) converters are studied as an alternative inductive SC topology. The benefits of FCML converters over the other inductive SC topologies are discussed. Results from a 50 V to 7 V 4-level flying capacitor converter are presented. A control method to balance the flying capacitor voltages through low frequency closed loop feedback on the switching node voltage is presented. Though not discussed in detail, it can be appreciated that the multi-mode operation of inductive SC converters could also be applied to FCML converters to improve their efficiency and power density.
Book Synopsis Design Techniques for Fully Integrated Switched-Capacitor Voltage Regulators by : HANH-PHUC LE
Download or read book Design Techniques for Fully Integrated Switched-Capacitor Voltage Regulators written by HANH-PHUC LE and published by . This book was released on 2013 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: As parallelism increases the number of cores integrated onto a chip, there is a clear need for fully integrated DC-DC converters to enable efficient on-die power management. Due to the availability of high density and low series resistance capacitors in existing CMOS processes, switched-capacitor DC-DC converters have recently gained significant interest as a cost-effective means of enabling such power management functionality. In this thesis, described are design techniques to implement fully integrated switched-capacitor DC-DC converters with high power density and efficiency. The area required by a fully integrated switched-capacitor DC-DC converter in order to deliver a certain level of power to the load has direct implications on both cost and efficiency, and hence in Chapter 2 a methodology is presented to predict and minimize the losses of such a converter operating at a given power density. Chapter 3 further introduces gate driver and level shifter circuit design strategies to enable topology reconfiguration and hence efficient generation of a wider range of output voltages. In order to demonstrate the possibility of replacing all off-chip PMICs, Chapter 4 presents a battery-connected switched-capacitor DC-DC converter that is able to convert the wide input voltage range from Li-ion battery to an output regulated at ~1V using cascode switches and intermediate voltage rails. The SC converter in Chapter 4 also employs a fast control loop to regulate the output with sub-ns response times. Measured results from the converters presented in Chapters 3 and 4 match with the analytical prediction and, thus, confirm the design methodology presented in Chapter 2. The 32nm SOI prototype presented in Chapter 3 achieves ~80% efficiency at a power density of ~0.5-1W/mm2 for a 2:1 step-down converter operating from a 2V input and utilizing only standard MOS capacitors. Reconfiguration of the converter's topology enables it to maintain greater than 70% efficiency for most of the output voltage range from 0.7V to ~1.15V. The 65nm Bulk CMOS prototype discussed in Chapter 4 also utilizes only standard MOS capacitors to regulate the output voltage at ~1V from a ~2.9V-4V input. It achieves ~73% efficiency at 0.19 W/mm2 output power density and maintain efficiency above 72% over the whole range of target power density. The sub-ns response control loop maintains
Book Synopsis Integrated Power Electronic Converters and Digital Control by : Ali Emadi
Download or read book Integrated Power Electronic Converters and Digital Control written by Ali Emadi and published by CRC Press. This book was released on 2017-12-19 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of the demand for higher efficiencies, smaller output ripple, and smaller converter size for modern power electronic systems, integrated power electronic converters could soon replace conventional switched-mode power supplies. Synthesized integrated converters and related digital control techniques address problems related to cost, space, flexibility, energy efficiency, and voltage regulation—the key factors in digital power management and implementation. Meeting the needs of professionals working in power electronics, as well as advanced engineering students, Integrated Power Electronic Converters and Digital Control explores the many benefits associated with integrated converters. This informative text details boost type, buck type, and buck-boost type integrated topologies, as well as other integrated structures. It discusses concepts behind their operation as well specific applications. Topics discussed include: Isolated DC-DC converters such as flyback, forward, push-pull, full-bridge, and half-bridge Power factor correction and its application Definition of the integrated switched-mode power supplies Steady-state analysis of the boost integrated flyback rectifier energy storage converter Dynamic analysis of the buck integrated forward converter Digital control based on the use of digital signal processors (DSPs) With innovations in digital control becoming ever more pervasive, system designers continue to introduce products that integrate digital power management and control integrated circuit solutions, both hybrid and pure digital. This detailed assessment of the latest advances in the field will help anyone working in power electronics and related industries stay ahead of the curve.
Book Synopsis Design and Control of Power Converters 2020 by : Manuel Arias
Download or read book Design and Control of Power Converters 2020 written by Manuel Arias and published by MDPI. This book was released on 2021-06-04 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, nine papers focusing on different fields of power electronics are gathered, all of which are in line with the present trends in research and industry. Given the generality of the Special Issue, the covered topics range from electrothermal models and losses models in semiconductors and magnetics to converters used in high-power applications. In this last case, the papers address specific problems such as the distortion due to zero-current detection or fault investigation using the fast Fourier transform, all being focused on analyzing the topologies of high-power high-density applications, such as the dual active bridge or the H-bridge multilevel inverter. All the papers provide enough insight in the analyzed issues to be used as the starting point of any research. Experimental or simulation results are presented to validate and help with the understanding of the proposed ideas. To summarize, this book will help the reader to solve specific problems in industrial equipment or to increase their knowledge in specific fields.
Book Synopsis High Efficiency Integrated Switched Capacitor Converter for High Voltage Low Power Applications by : Xiaomin Li
Download or read book High Efficiency Integrated Switched Capacitor Converter for High Voltage Low Power Applications written by Xiaomin Li and published by . This book was released on 2016 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design Space Evaluation for Resonant and Hard-charged Switched Capacitor Converters by : Jordan Alexander Gamble
Download or read book Design Space Evaluation for Resonant and Hard-charged Switched Capacitor Converters written by Jordan Alexander Gamble and published by . This book was released on 2018 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: USB Power Delivery enables a fixed ratio converter to operate over a wider range of output voltages by varying the input voltage. Of the DC/DC step-down converters powered from this type of USB, the hard-charged Switched Capacitor circuit is of interest to industry for its potential high power density. However implementation can be limited by circuit efficiency. In fully resonant mode, the efficiency can be improved while also enabling current regulation. This expands the possible applications into battery chargers and eliminates the need for a two-stage converter. In this work, the trade-off in power loss and area between the hard-charged and fully resonant switched capacitor circuit is explored using a technique that remains agnostic to inductor technology. The loss model for each converter is presented as well as discussion on the restrained design space due to parasitics in the passive components. The results are validated experimentally using GaN-based prototype converters and the respective design spaces are analyzed.
Book Synopsis Design of Integrated High-voltage Power Converters and Their Applications in Solid-state LED Lighting Systems by : Zhidong Liu
Download or read book Design of Integrated High-voltage Power Converters and Their Applications in Solid-state LED Lighting Systems written by Zhidong Liu and published by . This book was released on 2015 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Digital Control of High-Frequency Switched-Mode Power Converters by : Luca Corradini
Download or read book Digital Control of High-Frequency Switched-Mode Power Converters written by Luca Corradini and published by John Wiley & Sons. This book was released on 2015-07-10 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is focused on the fundamental aspects of analysis, modeling and design of digital control loops around high-frequency switched-mode power converters in a systematic and rigorous manner Comprehensive treatment of digital control theory for power converters Verilog and VHDL sample codes are provided Enables readers to successfully analyze, model, design, and implement voltage, current, or multi-loop digital feedback loops around switched-mode power converters Practical examples are used throughout the book to illustrate applications of the techniques developed Matlab examples are also provided