A continuing objective in the field of power electronics is to generate improved structures of switching converters to fulfill application requirements. This book provides methods for design, modelling and control of new DC-DC switching topologies. The fundamental idea behind the methodology proposed to generate new converter structures was to break the symmetry. This allows the generation of asymmetrical interleaved converters, which provides low current and voltage ripples working on high boosting ratio at DCM conditions. This book also introduces a novel conceptual modelling approach called Modified Averaging Using Graphical Methods. This new method is an accurate and simple solution for control-oriented modelling of DC-DC converters operating on DCM. Such topics are addressed by formal analyses, using simulation results and experimental validations. This book is intended for researchers and students with basic power electronics and control knowledge, but who are novices in interleaved topologies analysis. Scientist interested in industrial power electronics and modeling and control of non-linear systems may also find this book useful.
This book can be described as bible for people who are invested in research and studies of HVDC, step up DC-DC converter. This adds a fresh perspective into the area of step up converter and HVDC. It simply blows the mind of people who are interested in innovative converters, available in the market. The author has dedicated his vast knowledge obtained through hands on experience in DC- DC step up converter. The book easily conveys the idea of converters and also explores the marvels of simple yet complicated understanding of HVDC.
This textbook originated in my research Reconfigurable Rectangular to Polar Converter using Linear Convergence for Multiband and Multimode Wireless Communications submitted at the Panjab University, Chandigarh (India). The book covers the transitional area between low frequency and high frequency wireless circuits. Specifically, it introduces the fundamental physical principles related to the operation of a typical wireless radio communication system. The intended audience for this book are, primarily, senior engineering students preparing for research in wireless communication systems. At the same time, my hope is that graduate engineering students will find this book a useful reference for some of the topics that have been only touched upon in the previous stages of their education, or are explained from a different point of view. Finally, the research students may find this book a handy source for the quick answers that are routinely omitted from most textbooks. For their knowledge, a detailed study of designing wireless transmitter architectures using MATLAB/Simulink and System Generator software, synthesis with ISE 10.1 software and implementation on Virtex-2 Xilinx FPGA is given.
The last ten years in power electronics have seen only minor changes and novelty in the field of converter topologies. On the other hand, developments in power semiconductors have been tremendous. Using new state of the art components, traditional topologies can be used more efficiently and for much higher power levels. The recent efforts in the field of semiconductors are especially interesting for high power and high voltage applications, where the voltage blocking capability of components has always been a major issue. In order to achieve the needed voltage blocking capability traditionally many low voltage components are connected in series but, as a result, the number of components and the complexity of a system will increase, which reduces the efficiency and overall reliability of the converter. Using new high-voltage IGBTs the efficiency and power density of converters and thus, the feasibility of the whole system can be enhanced. This book has presented a theoretical and practical knowledge base with detailed analysis of state of the art issues and technology trends related to rolling stock converters with high-voltage IGBTs.
The functioning of human brain is one of the greatest enigmas of science at present: formed by a net of approximately 10^10 neurons interconnected by 10^15 connections in a volume of just 1500 cm^3, it consists in one of the most complex systems known in the Universe by Mankind. To attack this problem of such complexity, this book attempt to congregate efforts from different areas of knowledge for the development of research ranging from theoretical models in neurobiophysics to scientific instrumentation used in our experimental procedures, working in the frontiers of Physics, Biology, Computer Sciences, Electronics and Mathematics. We have chosen the fly because it has a much simpler nervous system than the human brain, but even so, tremendously complicated. Besides, we can carry out experiments in a living fly through many days without problems, studying particular areas in its brain. Pulses generated by the H1 neuron are electronically registered in synchrony with a moving image seen by the fly in a monitor. We study this signal "converter" from analogical (the velocity of the stimulus) to digital (the neuron pulses) to find out what is the neural code used by the fly.
The operating point of the PV system depends upon the temperature, irradiation, wind speed, humidity and other environmental factors. To operate the photovoltaic system in a power efficient way, the designer should be well acquainted with the knowledge of photovoltaic behavior in terms of voltage, current and power. The task of an efficient PV system is to track the maximum operating point correctly so that optimum power can be received from the sun. Although the efficiency of the solar photo voltaic system is improving day by day but still optimum power has not been harnessed due to changes in temperature, irradiance and other factors that vary with places. The study has investigated the change in volume of water pumped by using maximum power point tracking mechanism and its benefits to the end user. The work is based on the maximum power transfer theory. The DC-DC converter will match the impedance of the photovoltaic module with the load by generating appropriate duty cycle that will be used to turn ON or OFF the electronic switch of the converter. Hence, this study is intended to design and simulate an efficient MPPT based PV tracking system for pumping application.
This book deals with modeling and implementation of high performance, current-steering D/A-converters for digital transceivers in nanometer CMOS technology. In the first part, the fundamental performance limitations of current-steering DACs are discussed. Based on simplified models, closed-form expressions for a number of basic non-ideal effects are derived and tested. With the knowledge of basic performance limits, the converter and system architecture can be optimized in an early design phase, trading off circuit complexity, silicon area and power dissipation for static and dynamic performance. The second part describes four different current-steering DAC designs in standard 130 nm CMOS. The converters have a resolution in the range of 12-14 bits for an analog bandwidth between 2.2 MHz and 50 MHz and sampling rates from 100 MHz to 350 MHz. Dynamic-Element-Matching (DEM) and advanced dynamic current calibration techniques are employed to minimize the required silicon area.
Modeling of photovoltaic sources and their emulation by means of power electronic converters are challenging issues. The former is tied to the knowledge of the electrical behavior of the PV generator, the latter consists in its realization by a suitable power amplifier. This extensive introduction to the modeling of PV generators and their emulation by means of power electronic converters will aid in understanding and improving design and set up of new PV plants. The main benefit of reading Photovoltaic Sources is the ability to face the emulation of photovoltaic generators obtained by the design of a suitable equipment in which voltage and current are the same as in a real source. This is achieved according to the following steps: the source electrical behavior modeling, the power converter design, including its control, for the laboratory emulator. This approach allows the reader to cope with the creation of an indoor virtual photovoltaic plant, in which the environmental conditions can be imposed by the user, for testing real operation including maximum power point tracking, partial shading, control for the grid or load interfacing, etc.Photovoltaic Sources is intended to meet the demands of postgraduate level students, and should prove useful to professional engineers and researchers dealing with the problems associated with modeling and emulation of photovoltaic sources.
This book focuses on the design of a Mega-Gray (a standard unit of total ionizing radiation) radiation-tolerant ps-resolution time-to-digital converter (TDC) for a light detection and ranging (LIDAR) system used in a gamma-radiation environment. Several radiation-hardened-by-design (RHBD) techniques are demonstrated throughout the design of the TDC and other circuit techniques to improve the TDC's resolution in a harsh environment are also investigated. Readers can learn from scratch how to design a radiation-tolerant IC. Information regarding radiation effects, radiation-hardened design techniques and measurements are organized in such a way that readers can easily gain a thorough understanding of the topic. Readers will also learn the design theory behind the newly proposed delta-sigma TDC. Readers can quickly acquire knowledge about the design of radiation-hardened bandgap voltage references and low-jitter relaxation oscillators, which are introduced in the content from a designer's perspective.· Discusses important aspects of radiation-tolerant analog IC design, including realistic applications and radiation effects on ICs,· Demonstrates radiation-hardened-by-design techniques through a design-test-radiation assessment practice,· Describes a new type of Time-to-Digital (TDC) converter designed for radiation-tolerant application,· Explains the design and measurement of all functional blocks (e.g., bandgap reference, relaxation oscillator) in the TDC.