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Für die optimale Auslegung von EMV-Maßnahmen ist die Kenntnis der Hochfrequenzeigenschaften der zu entstörenden Systeme entscheidend. Da die Eigenschaften und Störgrößen jedoch grundsätzlich von der tatschlichen Einbausituation und dem Betriebszustand des Systems abhängen, ist eine In-situ-Vermessung anzustreben. Kalibrierte induktive Messzangen eignen sich prinzipiell für die kontaktlose breitbandige Messung von Störströmen und Impedanzen. Die zugehörige Kalibriermethode wird vorgestellt und Optimierungsmöglichkeiten aufgezeigt. Induktive Messzangen sind im Frequenzbereich von 9 kHz bis 500 MHz auf Ferritkerne zur Verbesserung der Kopplung angewiesen. Hohe DC- oder NF-Betriebsströme des zu vermessenden Systems führen somit zwangsläufig zu Sättigungseffekten in den Kernen der Messzangen und es kommt zu Messabweichungen. In dieser Arbeit wird der Einfluss dieser so genannten Biasströme auf induktive HF-Messverfahren theoretisch abgeschätzt und experimentell untersucht. Es wird ein geeigneter Referenzmessaufbau vorgestellt und damit die Messabweichungen für die Impedanz- und die Strommessung bei DC-Biasströmen bis 200 A erstmals explizit sichtbar gemacht. Es wird gezeigt, dass sich der Einfluss der Betriebsströme durch Designmaßnahmen und die Verwendung nanokristalliner Kernmaterialien deutlich verringern lässt. Die systematische Charakterisierung der biasstromabhängigen Eigenschaften der Messzangen ermöglicht darüber hinaus einerseits eine genaue Analyse der Messabweichungen und andererseits eine Korrektur des Biasstromeinflusses.

Written with the field technician, engineer, or reliability/maintenance manager in mind, Practical Electrical and Current Signature Analysis for Electrical Machinery and Systems is an essential working tool for the new and experienced ESA and MCSA practitioner. The book takes the practitioner well beyond the electric motor into incoming power, mechanical components, and driven equipment up to and including complete DFIG wind turbine and powertrain analysis and alternative energy transformers. It is based upon decades of field experience and practical research concluding with an overview of machine learning associated with basic motor data and present applications of ESA/MCSA IoT systems. Whether data collection or continuous monitoring regardless of the technician's choice of technology, you will understand the requirements, capabilities, and limitations to provide accurate prognostics. For managers and engineers who need to understand the capabilities of ESA/MCSA the book provides an easy-to-understand overview of the technology along with extensive real case studies.

This textbook for a one-semester course in Electrical Circuit Theory is written to be concise, understandable, and applicable. Matlab is used throughout, for coding the programs and simulation of the circuits. Every new concept is illustrated with numerous examples and figures, in order to facilitate learning. The simple and clear style of presentation, along with comprehensive coverage, enables students to gain a solid foundation in the subject, along with the ability to apply techniques to real circuit analysis. Written to be accessible to students of varying backgrounds, this textbook presents the analysis of realistic, working circuitsPresents concepts in a clear, concise and comprehensive manner, such as the difficult problem of setting up the equilibrium equations of circuits using a systematic approach in a few distinct stepsIncludes worked examples of functioning circuits, throughout every chapter, with an emphasis on real applicationsIncludes numerous exercises at the end of each chapter Provides program scripts and circuit simulations, using the popular and widely used Matlab software, as supplementary material online

Os conceitos de energia, eletricidade, corrente e resistência elétrica; as características e tipos de resistores; as principais leis que regem os cálculos dos valores reais de cada componente de um circuito; potência elétrica em CC e CA; fontes de alimentação são apresentados nesta publicação, de forma clara e didática. O livro destaca a origem e as propriedades magnéticas e eletromagnéticas dos materiais, além das leis relacionadas; a geração de corrente alternada; as características dos capacitores e indutores; os vetores em CA; os instrumentos de medição e tipos de sensores.

Electric currents are fundamental to the structure and dynamics of space plasmas, including our own near-Earth space environment, or “geospace.”This volume takes an integrated approach to the subject of electric currents by incorporating their phenomenology and physics for many regions in one volume. It covers a broad range of topics from the pioneers of electric currents in outer space, to measurement and analysis techniques, and the many types of electric currents. First volume on electric currents in space in over a decade that provides authoritative up-to-date insight on the current status of research Reviews recent advances in observations, simulation, and theory of electric currents Provides comparative overviews of electric currents in the space environments of different astronomical bodies Electric Currents in Geospace and Beyond serves as an excellent reference volume for a broad community of space scientists, astronomers, and astrophysicists who are studying space plasmas in the solar system.Read an interview with the editors to find out more: https://eos.org/editors-vox/electric-currents-in-outer-space-run-the-show

In It's Electric! Currents, students will learn all about electricity–how energy can be transferred from place to place by sound, light, heat, and electric currents, and much more. Readers will love discovering new information in this chapter book while also reinforcing learned skills with comprehension and extension activities. The Let's Explore Science series allows readers to dive into the world of fascinating science-related topics while strengthening reading comprehension skills. Each 48-page title features full-color photographs, real-world applications, content vocabulary, and more to effectively engage young learners.

In dem Buch Elektrischer Strom und Oberflächenladungen wird die elektrische Kraft zwischen einem Ladungsträger und einem relativ dazu ruhenden gleichstromführenden Leiterkreis untersucht. Anhand vorgestellter Experimente und analytischer Berechnungen wird die Existenz einer solchen Kraft aufgezeigt und damit den Aussagen vieler Wissenschaftler widersprochen. Das Ausmaß dieser Kraft ist proportional zur Spannung der an den ohmschen Leiter angeschlossenen Batterie. Das Buch enthält weiterhin Berechnungen des Potentials und des elektrischen Feldes innerhalb und außerhalb gleichstrom-führender ohmscher Leiter, sowie die Verteilung von Ladungsträgern längs der Oberfläche der Leiter, wodurch diese elektrischen Felder bewirkt werden. In zwei Anhängen werden die avantgardistischen und revolutionären Arbeiten von Wilhelm Weber und Gustav Kirchhoff diskutiert. Am Schluß findet sich eine ausführliche Liste neuerer Literatur zu diesen Themen.

Since Paul Cranefield published his monograph, The Conduction of the Cardiac Impulse, in 1975, much has been learned about the role of the slow inward current in cardiac electrophysiology. Because of this expanse in know­ ledge, both basic and clinical, it appeared reasonable to review in a mono­ graph once again what was known. When Martinus Nijhoff first approached us to undertake the task of updating this information, we were initially reluctant for several reasons. First, we did not feel that the subject could be adequately and thoroughly reviewed, from the cell to the bedside, by a single person. Second, time constraints on all of us precluded even attempting such a task. However, we were encouraged by several of our friends ('egged on'one might even say, since they wished the job done but did not want to do it themselves!) who promised faithfully to contribute chapters on time if we accepted the task. So we did, and most of them did also.

Chapter 1 - Electric Charge and Electric Current Chapter 2 - Electric Field and Electric Potential Chapter 3 - Electromagnetism Chapter 4 - Electrical Network

Chapter 1 - Alternating Current Chapter 2 - Electric Power Transmission and Distribution Chapter 3 - Utility Frequency Chapter 4 - Mains Power around the World Chapter 5 - War of Currents

Chapter 1 - Electric Current Chapter 2 - AC/DC (Electricity) Chapter 3 - Alternating Current Chapter 4 - Direct Current and Persistent Current Chapter 5 - Displacement Current Chapter 6 - Streaming Current and Ampere Chapter 7 - Current Density Chapter 8 - Ammeter Chapter 9 - Current Transformer and Current Clamp Chapter 10 - Current Mirror Chapter 11 - Hydraulic Analogy

Chapter 1 - Bode Plot Chapter 2 - Breakdown Voltage & Inrush current Chapter 3 - Input Impedance & Equivalent Series Resistance Chapter 4 - Johnson–Nyquist Noise Chapter 5 - Nominal Impedance & Overdrive Voltage Chapter 6 - Power Factor Chapter 7 - Phase Margin, Power Gain & Power Rating Chapter 8 - Shot Noise Chapter 9 - Stray Voltage Chapter 10 - Voltage Drop & Threshold Voltage Chapter 11 - Q Factor Chapter 12 - Electronic Circuit Chapter 13 - Semiconductor Device

Chapter 1 - Electric Arc Chapter 2 - Arc Welding Chapter 3 - Electrical Breakdown Chapter 4 - Mercury Arc Valve Chapter 5 - Electric Arc Furnace Chapter 6 - Spark Gap Chapter 7 - Electrical Discharge Machining Chapter 8 - Spark–gap Transmitter Chapter 9 - Gas–discharge Lamp Chapter 10 - Spark Plug Chapter 11 - Fluorescent Lamp Chapter 12 - Compact Fluorescent Lamp Chapter 13 - Sodium–Vapor Lamp Chapter 14 - Electrodeless Lamp

ポイント丸ごと早わかり！問題がスイスイ解ける！下敷きで隠せば何度も復習できる！ 真空中の静電界（クーロンの法則、ガウスの定理を含む）、真空中の静磁界、電磁誘導、誘電体とコンデンサ、導体と抵抗、電流、磁性体、影像法、回路に働く磁気エネルギー、光・電磁波、マクスウェル方程式など、大学で教えられる「電磁気学」の通年講義での内容をこの一冊でカバーする、自習用の参考書。

最新のOFDM伝送技術を含め、電波のしくみと情報伝送をわかりやすく解説！ 本書は、電波のもつ性質と無線通信や放送での電波の利用法について、わかりやすく解説した書籍として発行するもの。 基本部分については高校の物理の内容でも理解できるよう、丁寧に解説するとともに第三世代携帯電話のCDMAや地上デジタル放送で使われるOFDM方式など最新の技術についても、具体的にわかりやすく解説し、電波の発見から現状に至る利用の流れ、その技術動向が俯瞰できる内容となっている。

The purpose of this book is to describe the theory of Digital Power Electronics and its applications. The authors apply digital control theory to power electronics in a manner thoroughly different from the traditional, analog control scheme. In order to apply digital control theory to power electronics, the authors define a number of new parameters, including the energy factor, pumping energy, stored energy, time constant, and damping time constant. These parameters differ from traditional parameters such as the power factor, power transfer efficiency, ripple factor, and total harmonic distortion. These new parameters result in the definition of new mathematical modeling:• A zero-order-hold (ZOH) is used to simulate all AC/DC rectifiers.• A first-order-hold (FOH) is used to simulate all DC/AC inverters.• A second-order-hold (SOH) is used to simulate all DC/DC converters.• A first-order-hold (FOH) is used to simulate all AC/AC (AC/DC/AC) converters. - Presents most up-to-date methods of analysis and control algorithms for developing power electronic converters and power switching circuits - Provides an invaluable reference for engineers designing power converters, commercial power supplies, control systems for motor drives, active filters, etc. - Presents methods of analysis not available in other books

Early Electrodynamics discusses the history and initial developments in the theory for steady currents. The volume consists primarily of analysis on thesis in the field of electric science. A section of the book focuses on one thesis, the Dramatis Personae. An extensive account of the background of its author, Hans Christian Oersted, is given. Another personality of merit is Jean Baptiste Biot. He was one of the people who used a balloon to detect the oscillations of a small magnet. This experiment was one of his attempts to study the magnetic action of electric currents. The text contains a section on Ampere's philosophy of science. This philosophy greatly contributed to the science of electricity. Andre Marie Ampere conceptualized the theory of electrodynamics of steady currents. Ampere also proposed the quantitative theory of magnetism. A chapter of the book talks about the connection between an electrical conductor and a magnet. The book will provide useful information to electrical engineers, physicists, students and researchers in the field of electricity.

Early Electrodynamics: The First Law of Circulation accounts the development of electrodynamics. The title details the achievements of electrodynamics in its early days. The coverage of the text includes the various personalities that contributed in the development of electrodynamics. Next, the selection also reviews the materials that helped set up the rules according to which the forces which one circuit carrying an electric current exerts upon another nearby, may be calculated. The fourth chapter discusses the criticism on electrodynamics. The text also examines the criticism on electrodynamics when it initially introduced. The book will be of great interest to engineers and scientists who are dealing with electrical theory.

A communication system must have adequate electrical protection in order to meet the reliability standards for commercially acceptable service and to keep down maintenance expenses. This report characterizes, from the viewpoint of electrical protection and coordination, the conditions of the electrical environment to which communication facilities are exposed. It gives consideration to both present and anticipated future conditions, and covers such topics as the effects of lightning, interference from power networks, electric shock, earth potential gradients, corrosion, over-voltage in AC power utilization circuits,her and electromagnetic pulses.Characterization of the Electrical Environment is a current reference on the design factors required to ensure reliable performance of communication facilities under field operating conditions. It will be useful as a manual for practicing engineers in telecommunications, and as a tutorial textbook in engineering schools in North America, Europe, and elsewhere.

Electricity Made Simple covers the fundamental principles underlying every aspect of electricity. The book discusses current; resistance including its measurement, Kirchhoff's laws, and resistors; electroheat, electromagnetics and electrochemistry; and the motor and generator effects of electromagnetic forces. The text also describes alternating current, circuits and inductors, alternating current circuits, and a.c. generators and motors. Other methods of generating electromagnetic forces are also considered. The book is useful for electrical engineering students.