Download or read book Analysis and Design of High Power Density Resonant Switched capacitor Converters written by and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Design and Analysis of Switched capacitor Based Partial Power Architecture for Radio Frequency DC DC Power Conversion with Gallium Nitride Power Devices written by and published by . This book was released on 2016 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates a new reconfigurable switched-capacitor (SC) based partial power architecture which enhances the performance of resonant DC/DC converters operating at radio frequency (RF) with gallium nitride (GaN) power devices to address challenges in telecommunication brick DC/DC converters. The proposed architecture has a comprehensive compatibility with existing RF and SC topologies and improves the performance of RF converters through partitioning of energy conversion stage and output regulation stage. Emerging new wide bandgap devices like GaN FETs enable a higher power density DC/DC converter design. A wider input range, larger voltage conversion ratio, smaller size, and excellent transient performance are expected. The prototype of the proposed GaN reconfigurable SC-based partial power RF converter comprises of a 20 MHz resonant single-ended-primary-inductor-converter (SEPIC) as a regulated stage and a high-efficiency 2 MHz reconfigurable SC as an unregulated stage. The GaN RF resonant SEPIC regulates the output using a robust ON/OFF control scheme, which enables fast transient responses. The high-efficiency GaN reconfigurable SC provides 1:1, 2:1 and 3:1 voltage conversion ratio which widens the input voltage range. A full time-domain, closed-form analytical model for RF resonant SEPIC has been developed, and new design methodology has been proposed for the GaN reconfigurable SC to address the design challenges at megahertz. The electromagnetic interference (EMI) characteristics of the prototype have also been investigated and evaluated by experiments. An alternative control scheme and PCB layout guidelines have been developed for EMI reduction.
Download or read book Advanced Multiphasing Switched Capacitor DC DC Converters written by Nicolas Butzen and published by Springer. This book was released on 2020-08-19 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a detailed analysis of switched-capacitor DC-DC converters that are entirely integrated on a single chip and establishes that these converters are mainly limited by the large parasitic coupling, the low capacitor energy density, and the fact that switched-capacitor converter topologies only have a fixed voltage conversion ratio. The authors introduce the concept of Advanced Multiphasing as a way to circumvent these limitations by having multiple out-of-phase parallel converter cores interact with each other to minimize capacitor charging losses, leading to several techniques that demonstrate record efficiency and power-density, and even a fundamentally new type of switched-capacitor topology that has a continuously-scalable conversion ratio. Provides single-source reference to the recently-developed Advanced Multiphasing concept; Enables greatly improved performance and capabilities in fully integrated switched-capacitor converters; Enables readers to design DC-DC converters, where multiple converter cores are put in parallel and actively interact with each other over several phases to improve their capabilities.
Download or read book Integrated Hybrid Resonant DCDC Converters written by Peter Renz and published by Springer Nature. This book was released on 2020-12-29 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive, single-source on resonant switched-capacitor converters. It is written in the style of a handbook, with systematic guidelines, and includes implementation examples. The authors explore integrated hybrid resonant DCDC converters in order to achieve highly compact, energy efficient and cost-effective power management solutions in the growing fields of wearables and internet-of-things applications. They provide an introduction into hybrid converters as a new and promising converter class, which merges capacitive and inductive conversion concepts into one. Coverage ranges from fundamentals to implementation details, including topics such as power stage design, gate drive schemes, different control mechanisms for resonant operation and integrated passives. Introduces a new, multi-ratio resonant converter architecture, which enables lower switching frequencies and better passive component utilization; Discusses circuit block design for high efficiency of the power stage; Explores implementation details and concepts for integrated passives; Derives models, implements and compares to each other different control mechanisms.
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.
Download or read book Soft Commutation Isolated DC DC Converters written by Ivo Barbi and published by Springer. This book was released on 2018-08-27 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the operation and analysis of soft-commutated isolated DC–DC converters used in the design of high efficiency and high power density equipment. It explains the basic principles behind first- and second-order circuits with power switches to enable readers to understand the importance of these converters in high efficiency and high power density power supply design for residential, commercial, industrial and medical use as well as in aerospace equipment. With each chapter featuring a different power converter topology, the book covers the most important resonant converters, including series resonant converters; resonant LLC converters; soft commutation pulse width modulation converters; zero voltage switching; and zero current switching. Each topic is presented with full analysis, a showcase of the power stages of the converters, exercises and their solutions as well as simulation results, which mainly focus on the commutation analysis and output characteristic. This book is a valuable source of information for professionals working in power electronics, power conversion and design of high efficiency and high power density DC–DC converters and switch mode power supplies. The book also serves as a point of reference for engineers responsible for development projects and equipment in companies and research centers and a text for advanced students.
Download or read book Analysis and Design of Power Converter Topologies for Application in Future More Electric Aircraft written by Amit Kumar Singh and published by Springer. This book was released on 2018-04-20 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis proposes new power converter topologies suitable for aircraft systems. It also proposes both AC-DC and DC-DC types of converters for different electrical loads to improve the performance these systems. To increase fuel efficiency and reduce environmental impacts, less efficient non-electrical aircraft systems are being replaced by electrical systems. However, more electrical systems requires more electrical power to be generated in the aircraft. The increased consumption of electrical power in both civil and military aircrafts has necessitated the use of more efficient electrical power conversion technologies. This book presents acomprehensive mathematical analysis and the design and digital simulation of the power converters. Subsequently it discusses the construction of the hardware prototypes of each converter and the experimental tests carried out to verify the benefits of the proposed solutions in comparison to the existing solutions.
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.
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.
Download or read book Design and Control for Switch mode Voltage Regulation by Gyrator Resonant Switched capacitor Converters written by Alon Cervera and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "... The objective of this PhD research program is to provide and detail a generalized power management scheme for high-efficiency power conversion and continuous output voltage regulation using switched-capacitor technology for a wide variety of applications. Efficient power conversion is achieved without or with significantly reduced magnetics, by utilizing capacitive elements as the energy transfer vehicle. This ultimately allows for high power-density and is the key to power-integration. ..." -- from the abstract.
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.
Download or read book Power Electronics Handbook written by Muhammad H. Rashid and published by Elsevier. This book was released on 2010-07-19 with total page 1189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power electronics, which is a rapidly growing area in terms of research and applications, uses modern electronics technology to convert electric power from one form to another, such as ac-dc, dc-dc, dc-ac, and ac-ac with a variable output magnitude and frequency. Power electronics has many applications in our every day life such as air-conditioners, electric cars, sub-way trains, motor drives, renewable energy sources and power supplies for computers. This book covers all aspects of switching devices, converter circuit topologies, control techniques, analytical methods and some examples of their applications.* 25% new content* Reorganized and revised into 8 sections comprising 43 chapters* Coverage of numerous applications, including uninterruptable power supplies and automotive electrical systems* New content in power generation and distribution, including solar power, fuel cells, wind turbines, and flexible transmission
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
Download or read book Soft Commutation written by Y. Cheron and published by Springer Science & Business Media. This book was released on 1992-05-31 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author gives a thorough explanation of soft commutation making use of the concept of duality to explain the principles of the technique and to place it in context in the field of power electronics.
Download or read book Power Systems On Chip written by Bruno Allard and published by John Wiley & Sons. This book was released on 2016-11-22 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book gathers the major issues involved in the practical design of Power Management solutions in wireless products as Internet-of-things. Presentation is not about state-of-the-art but about appropriation of validated recent technologies by practicing engineers. The book delivers insights on major trade-offs and a presentation of examples as a cookbook. The content is segmented in chapters to make access easier for the lay-person.
Download or read book Advances in High Efficiency LLC Resonant Converters written by and published by . This book was released on 2020-10-02 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
