This text studies ways to ground and shield electronic equipment and facilities to control interference. The language of power engineers and the National Electrical Code are explained. The author also lays the ground rules for safety and explains how to attack and solve problems in grounding and shielding via a field theoretic approach rather than a circuit approach. Background theory is given and various hardware and equipment, all key areas in grounding and shielding, ESD, screened rooms, and topics in field coupling are provided.

Master's Thesis from the year 2014 in the subject Electrotechnology, grade: Master degree, Hohai University (College of Energy and Electrical Engineering), course: Power Electronics, language: English, comment: This study employs a buck ZCS (PWM) converter and develops a novel soft-switching approach for charger batteries. This thesis presents technique for battery charger to achieve efficient performance in charging shaping, minimum low switching losses and reduction in circuit volume. The operation of circuit charger is switched with the operation of zero-current-switching, resonant components and appends the topology of dc-dc buck. The proposed novel dc-dc battery charger has advantages with the simplicity, low cost, high efficiency., abstract: This study employs a buck ZCS (PWM) converter and develops a novel soft-switching approach for charger batteries. This thesis presents technique for battery charger to achieve efficient performance in charging shaping, minimum low switching losses and reduction in circuit volume. The operation of circuit charger is switched with the operation of zero-current-switching, resonant components and appends the topology of dc-dc buck. The proposed novel dc-dc battery charger has advantages with the simplicity, low cost, high efficiency and the behavior of easy control under the ZCS condition accordingly reducing the switching losses. The detailed study of operating principle and circuit design consideration is performed. A short survey of battery charging system, capacity demand & its topological is also presented. In order to compute LC resonant pair values in conventional converter, the method of characteristic curve is used and electric function equations are derived from the prototype configuration. The efficient performance of charging shaping is confirmed through the practical examines and verification of the results is revealed by the MATLAB simulation. The efficiency is ensured about 89% which is substantially considere

Project Report from the year 2013 in the subject Electrotechnology, Sir Padampat Singhania University, course: Electronics and Communication, language: English, abstract: The power electronics device which converts DC power to AC power at required output voltage and frequency level is known as inverter. As we have found that different inverters are used for different equipment's so in our project titled " Analysis of Harmonics injected by Single phase Inverter," we are analyzing the harmonics present in single phase voltage source inverter using different loads (R, RL and RLC). We are analyzing Harmonics using MATLAB tools like Scope for harmonics and Simulink powergui for analysis of FFT of different Signals.

Master's Thesis from the year 2012 in the subject Electrotechnology, grade: 9.36, West Bengal University of Technology, course: M.TECH IN ADVANCE COMMUNICATION, language: English, comment: this research was performed during my M.Tech project. Further research is going on and i hope to reach to my goal regarding this topic., abstract: Advanced developments that were made recently in the field of Silicon (Si) semiconductor technology have allowed it to approach the theoretical limits of the Si material. However there are latest power device requirements for many applications that cannot be handled by the present Si-based power devices. These requirements include such as higher blocking voltages, switching frequencies, efficiency, and reliability. And hence, new semiconductor materials for power device applications are needed to overcome these limitations. For high power requirements, wide bandgap semiconductors like Silicon Carbide (SiC) and Gallium Nitride (GaN) and Gallium Arsenide (GaAs), which are having superior electrical properties, are likely to replace Si in the near future. This Study thesis compares the electrical characteristics of wide-bandgap semiconductors with respect to Silicon (Si) to verify their superior utility for power applications and predicts the future of power device semiconductor materials. This thesis also includes the study that has been performed regarding the electrical characteristics of high frequency semiconductor devices in terms of I-V characteristics and Noise Power Spectral Density (PSD) Analysis with respect to drain current fluctuation in the semiconductor devices. The semiconductor devices that are used for this particular thesis are - Metal Effect Semiconductor Field Effect Transistors (MESFETs) and High Electron Mobility Transistors (HEMTs).

Bachelor Thesis from the year 2013 in the subject Electrotechnology, grade: Bachelor, Harbin Engineering University (College of Automation), course: Electronics, language: English, abstract: In recent years, with the development of power electronic devices control theory and the increasing demand of high-quality power supply, power electronics technology has aroused widely attention from scholars. DC-DC power converters are employed in a variety of applications, including power supplies for personal computers, office equipment; spacecraft power systems, laptop, Cell phones, and telecommunications equipment, as well as dc motor drives. In this project a detailed study of zero current switching buck converters is done and also practically implemented in hardware. In addition a mathematical analysis of switching loss occurring in MOSFET's is also presented and a short study of zero voltage switching is also appended. During the hardware implementation the Ton, Toff and operating frequency were found out and thoroughly tuned through the IC555 circuit and various waveforms across inductors, capacitors, load resistor and test points were noted down. In this thesis, the Buck type circuit structure and working principle are analyzed and a DC-DC buck converter is designed. The designed converter uses ZCS scheme and realized the function that the power form is converted from 12V DC voltages to 5 V DC voltages. The output voltage can be adjusted according to the output resistor. The output voltage is stable and the performance of the designed converter is ensured. Simulation study was carried out and effectiveness of the designed converter is verified by simulation results. Finlay design is implemented in hardware and PCB layout as well.

Master's Thesis from the year 2013 in the subject Electrotechnology, grade: 1,0, University of Applied Sciences Regensburg (Fakultat Elektro- und Informationstechnik), language: English, comment: Masterarbeit im Studiengang "Master Applied Research in Engineering Sciences," abstract: Virtualization has come a long way since its beginnings in the 1960s. Nowadays, Virtual Machine Monitor (VMM)- or hypervisor-based virtualization of servers is the de facto standard in data centers. In recent years, virtualization has also been adopted to embedded devices such as avionics systems and mobile phones. The first mass deployment of embedded virtualization can probably be seen in video game consoles, though. However, the functionalities and possibilities provided by embedded virtualization today for the most part still are where they were when virtualization was in its infancy in the mainframe era. Moreover, it is still not employed by automotive electronics at all thus far. This thesis presents advancements achieved in hardware virtualization since then as well as their possible merits for embedded virtualization. The emphasis hereby lies on increases in reliability of the resulting embedded systems. Additionally, the focus is on automotive Electronic Control Units (ECUs) and especially the upcoming automotive domain controller architecture. This work is divided into five parts: The first one constitutes an introduction to the problem domain and highlights benefits of virtualizing embedded devices - in particular Domain Controller Units (DCUs), i. e. "server" variants of ECUs - beyond the mere partitioning into time and space. In the second part, an overview of virtualization technology centered around its basic principles is given. Against this background, complications of virtualizing Input/Output (I/O) operations with current hardware architectures and the adaption of their processors to virtualization are elaborated on. Moreover, the most prominent implications for se

A wireless sensor network is comprised of a large number of inexpensive battery-powered, self-organising sensor nodes. The sensor nodes can communicate among themselves and send their data through the network to a main location or sink where the data can be observed and analysed. Wireless sensor networks enable new applications and have gained a lot of attention in the last decade, as they have a great impact on real-life activities and hold true to the promise of delivering a smart communication paradigm. These networks are often deployed in hostile or inaccessible areas to collect environmental data for analysis and decision making. Due to the deployment cost, wireless sensor networks are usually planned to run for a long time once they are deployed. The book highlights power efficient design issues related to wireless sensor networks as well as the existing WSN applications. The research efforts being undertaken in this field which help the students and researchers to grasp the materials, enabling them to understand more advanced research and make a contribution in this field for themselves is also discussed. All the chapters of this book are written by several of the leading researchers. It is believed that this book will serve as a comprehensive reference for graduate and undergraduate students who seek to learn the latest advancements in wireless sensor networks.

Diploma Thesis from the year 2012 in the subject Electrotechnology, grade: 2.0 bzw."B," The Slovak Technical University (Faculty of electrical engineering and information technology), language: English, comment: Design a signal detection device for detection and digitization of weak signals with frequencies up to 25 Hz before their transmission into a personal computer (PC). The device should contain an input low-pass filter with a cutoff frequency of 25 Hz, a preamplifier, microcontroller MSP430F2013 for digitization and preparation of the digitized signals for transmission into the PC via USB interface., abstract: Design a signal detection device for detection and digitization of weak signals with frequencies up to 25 Hz before their transmission into a personal computer (PC). The device should contain an input low-pass filter with a cutoff frequency of 25 Hz, a preamplifier, microcontroller MSP430F2013 for digitization and preparation of the digitized signals for transmission into the PC via USB interface.

Publisher's Note: Products purchased from Third Party sellers are not guaranteed by the publisher for quality, authenticity, or access to any online entitlements included with the product. Ace the Journeyman and Master Electrician Exams!Featuring more than 1,500 practice questions and answers, Electrician's Exam Study Guide, Second Edition provides everything you need to prepare for and pass the Journeyman and Master electrician licensing exams on the first try. This practical, up-to-date resource is filled with detailed illustrations, Test Tips which explain how to arrive at the correct answers, and Code Updates which clarify changes in the 2011 NEC. Answer sheets include cross-references to the precise article and section of the NEC from which questions are taken. Fully revised throughout, this careerbuilding guide helps you: Master the material most likely to appear on thelicensing exams Improve your test-taking ability with 1,500+ true/falseand multiple-choice questions and answers Keep up with the 2011 NEC Acquire the confidence, skills, and knowledge needed topass your exam Covers essential topics, including: Articles 90 through 110 Wiring requirements and protection Wiring methods and materials Equipment for general use Special occupancies and classifications Special equipment Special conditions Communications Tables, annexes, and examples Math calculations and basic electrical theory Review and applying principles Master electrician skills Techniques for studying and taking your test

Scholarly Research Paper from the year 2006 in the subject Electrotechnology, grade: 1,0, University Karlsruhe (TH), language: English, abstract: Avoiding collision accidents is becoming more and more an important topic in the research field of driver assistant systems. Especially for vision-based detection systems there are various approaches, which are built upon many different methods. This thesis deals with the avoidance of pedestrian accidents, caused by Blind Corner view problems. The presented approach comprises a pedestrian detection subsystem, which is part of a large camera system framework covering observation of the car environment. Based on a Blind Corner Camera and a neural network classification method, research in this thesis is focused on two aspects: detection improvement and danger level estimation. Since vision-based classification methods usually are still not able to yield perfect results, because of the complexity of this task, the detection result has to be improved by preprocessing and post processing. In this work, first, effects of image enhancement methods on detection are tested as preprocessing methods and, secondly, a new approach for a simple tracking and estimation strategy is presented, which improves detection in the way of a post processing method. Finally, information from tracking and prediction is used to estimate a danger level for pedestrians, which provides information about how collisionprone the current situations is.