This chapter presents the most significant principles of creating a force or. The electromechanical energy conversion theory allows the representation of the electromagnetic force or torque in terms of device variables, such as the currents and the displacement of the mechanical systems. Ee 3410 electric power electromechanical energy conversion. Solar photons convert naturally into three forms of energy electricity, chemical fuel, and heatthat link seamlessly with existing energy chains. Copper wire data turns per inch, resistance per foot, etc. This technique is quite powerful in its ability to calculate forces and torques in complex electromechanical energy conversion systems. In 1959 the two published the seminal textbook electromechanical energy conversion wiley. Advanced energy conversion vol 7, issue 4, pages 191. Principles of electromechanical energy conversionintroduction, flow of energy in electromechanical devices, energy in magnetic systems defining energy and co energy, singly excited systems.
Department of physics and astronomy, university of delaware, newark, delaware 19716 usa. The energy converted per cycle to mechanical form is ffedx. Solar energy, with a focus on photovoltaics, which is the technology that allows to convert energy transported in light directly into electrical energy. This field of technology also includes electrical storage devices like batteries and supercapacitors. Electromechanical energy conversion linkedin slideshare. Milos petrovic electromechanical energy conversion, naucna knjiga, 1988 in serbian number of classes of active education per week during semestertrimesteryear radenko wolf, introduction to electrical machine theory, skolska knjiga zagreb in croation d.
Woodson, electromechanical energy conversion, john. Reviews circuit and power concepts in electrical circuits. Chemical energy from what the rider has eaten gets turned into kinetic energy. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Linear technologies energy harvesting regulators it looks like these devices may allow us to relax the requirement of at least 1. The last records of 5th of december 20 with a maximum power of 26. In this study, a novel allpurpose highpower matching device is proposed to be utilized in energy conversion applications. As seen from equation, the torque is zero if l d l q, i. About this course this webbased course on dynamics of multidisciplinary controlled systems has been developed for regular students wishing to complement the traditional facetoface courses distanceeducation students at di. Electric machinery, fitzgerald, kingsley and umans, mcgrawhill, 7th ed. Electromechanical systems are characterized by interaction of electromagnetic fields with inertial bodies. White, david c woodson author see all 2 formats and editions hide other. Electromechanical energy conversion hardcover january 1, 1959 by herbert h.
Electromechanical energy devices and power systems. Electromechanical energy conversion white, david c woodson, herbert h. Since electromechanical energy conversion can occur only by the. The primary purpose of most rotating machines is to convert energy between electrical and mechanical systems, either for electric power generation or. There are two general types of energy conversion, electromechanical and direct conversion. Macrosimulation of electric machines is considered on the basis of the concept of an electric machine as a set of electric circuits moving with respect to each other. Electrochemical energy conversion is a field of energy technology concerned with electrochemical methods of energy conversion including fuel cells and photoelectrochemical. Performance of electromagnetic devices and systems can be analyzed using the system vectors or the field vectors. The fundamental means of energy conversion is a variable capacitor that is excited through a generating energy conversion cycle with every vibration cycle of the converter. Textbook developed at mit in energy conversion no thermodynamics, white, david c. Sep 11, 2012 electrical machines contain stationary and moving parts coupled by an electrical or magnetic field.
Extension to high frequency problems is also outlined. Aug 02, 2012 electromechanical energy conversion substituting f from the equation of motion dx 2 dx we. Determination of mechanical force, mechanical energy, torque equation, doubly excited systems. The development of the simulation methods and solution algorithms is presented using as an example some problems in which the variety of physical processes in a machine is taken into account. Bibliography inductance, electromagnetic energy conversion.
Energy conversion by permanent magnet machines and. Despite the enormous energy flux supplied by the sun, the three conversion routes supply only a tiny fraction of our current and future energy needs. Electromechanical energy conversion white, david c. Publishers pdf, also known as version of record includes final page, issue and volume numbers. Reluctance network analysis of coupled fields in a. Standalone wind energy conversion system with an asynchronous generator article pdf available in journal of power electronics 105 september 2010 with 1,107 reads how we measure reads. A thorough and understandable treatment of the topic, it introduces different energy sources and various electric energy conversion techniques. The field acts on the machine parts and plays key role in the process of electromechanical conversion. Woodson is the author of electromechanical dynamics, discrete systems 4. C device electromechanical relay assume mobile armature is initially at open position. Principle of electromechanical energy conversion is a reversible process and eqs 4. Constitutive equations describing the coupling of multibody dynamics with kirchhoffs theory of electrical networks as a quasi stationaryapproximation of maxwells theory define discrete. Simply click on the topic name to download the ebooks of that topic.
Woodson for the invaluable assistance, both tangible and intangible. During this period we went through many versions of notes while teaching the material three semesters a year. This energy is converted to the energy of magnetic field, which is next converted into mechanical energy. Reference books electrical and computer engineering.
At that time we started the revision that resulted in the present book. Woodson wiley new york wikipedia citation please see wikipedias template documentation for further citation fields that may be required. These machines cover a wide range of frequencies from 0. Electromechanical energy conversion hardcover november 15, 1968 by david c. Electromagnetic induction is known as the generation of electromotive force emf in an electric conductor. The following sections outline the basic concepts behind energy conversion and specific converters. Electromechanical energy conversion book, 1959 worldcat. Power invariance transformation in power systems j. An early textbook to use the principle of maximum entropy as an approach to thermodynamics is tribus, m. For the first time in india we bring for our users lecture notes, presentations and ebooks covering subjectwise full semester syllabus. Since the torque in this particular electromechanical energy converter is due to the variation of reluctance with rotor position, the device is known as a synchronous reluctance machine. Pdf electromechanical portable energy harvesting device. This thesis presents a road map on how to design mems electrostatic vibrationtoelectric energy converters. In the proceding, the energy source for conversion provides a logical way to group the converter types discussed.
In the linear synchronous motor the electric energy is delivered to the system through the stator and rotor winding terminals called electrical ports. C device electromechanical relay assume mobile armature is initially at open position when the coil is excited by it, t is produced in m. Electromechanical energy devices 9780471572176 by yamayee, zia a bala, juan l. Electromechanical energy conversion semantic scholar. This text deals with energy conversion topics that should be well understood by all mechanical engineers. Ac electric lnr series owners manual installation and operating instructions caution the final determination as to the suitability of this product for any purpose is solely that of the user. For any use or distribution of this textbook, please cite as follows. The organisation of this book is roughly linked to the three lectures on photovoltaics pv, that are given at the faculty for electrical. Electromechanical energy conversion by david c white, herbert. Elected in 1975 contributions as an engineering educator and leader in energy conversion technology, energy systems analysis, and energy planning.
Since the energy storage system is lossless, it is a simple matter to write that the time rate of change of wild, the stored energy. Woodson author see all 2 formats and editions hide other formats and editions. Presents an overview of the electric power system and its components. Woodson constructed a generalized rotating energy converter to help educate students about the differences between ac and dc as well as induction and synchronous generators and motors. Among other activities, he and fellow faculty member herbert h. Electromechanical energy conversion by david c and herbert h. Initial gap length is 5 mm, internal resistance of the winding r 6, n 300, a c a g 6 x 6 36 cm2. Electromechanical energy conversion electrical machines contain stationary and moving parts coupled by an electrical or magnetic. Timedependent vector functions in electromechanical.
For this reason, it is often referred to as the coupling. A universal electromagnetic energy conversion adapter based. Since numerous types of electromechanical devices are. Chemical energy in the shape of the food the rider has eaten gets turned into kinetic energy as the bike pick up speed, potential energy if the rider heads uphill, and then some heat in muscles, tires, and bearings. Mechanicaltoelectric energy conversion by mechanically. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Electronic control of electromechanical energy conversion in. General principles michael faraday founded the principle of electromechanical energy conversion in 1831, when he studied the phenomena of electromagnetic induction.
Figure 1 below illustrates the trend in overall us energy efficiency as viewed through the energy flow from all fuel sources, conversions, and transmissions, through to end consumption. Sources, conversion, distribution, and use, wiley, 2010. Pdf standalone wind energy conversion system with an. Chemistry benergyassignmentquiz flashcards quizlet. Electromechanical interactions can be described by socalled constitutive equations.
Mit opencourseware for any use or distribution of this. Craig 8 if the magnetic system is linear, then the change in flux linkages results owing to a change in the inductance, i. New york, wiley 1959 ocolc601104575 online version. Electromechanical energy conversion by white, david c woodson, herbert h. This approach results in simple techniques and in rigorous treatments. The theory allows us to express the electromagnetic force or torque in terms of the device variables such as the currents and the displacement of the mechanical system. Electromechanical energy conversion theory is the cornerstone for the analysis of electromechanical motion devices. Electromechanical interactions in multibody systems. Bakshi electromechanical energy conversion pdf download a first course in electromechanical energy conversion. Since electromechanical energy conversion can occur only by the interaction of electromagnetic fields and material bodies in motion. It is intended to serve as a textbook for basic courses on electrical machines covering the fundamentals of the electromechanical energy conversion, transformers, classical electrical machines, i. It is increasingly important in context of automotive propulsion systems. It is intended for use in an introductory threesemesterhour course in energy conversion, to follow first courses in thermodynamics and fluid mechanics and, where possible, heat transfer.
Jun 06, 2017 electromechanical energy conversion 1. Electromechanical energy conversion by david c white. Wilson 2, rainee n simons 2, yunpeng chen 1, and john q. Our present concern is with the effects of external electrical coupling and internal mechanical losses. For the general analysis see white and woodson, op. Electromechanical energy conversion free ebooks download.
We have been shown that the mechanical medium can be an ionized gas 5 or a fluid. Energy stored in magnetic field, electromagnetic torque, generated e. In all electromechanical devices, mechanical motion must occur, either translational or rotational, and this motion is reflected into the electrical system either as. Their initial investment may be larger but two important parameters justify their use. It is a 6 kw matching device with a lowcost structure consisting of three distinct stages that a complementary pair of unitygain current mirrors has been utilized in each stage to provide appropriate output currents and voltages. A large number of reversible electromagnetic, thyristor controlled, linear motors fig. Electromechanical energy conversion copper losses core losses field losses mechanical losses dwelec vti dt i rdt ei dt 2 dwmech net mechanical energy output mechanical losses dwelec dwmech dwfld field losses dwelec dwmech dwfld schematic representation of an electromechanical energy conversion device. Department of energy conversion science energy conversion systems and their functional design in the 21st century in order to contribute to the development of a human society that coexists with the natural environment, and to establish ef. For this reason, it is often referred to as the coupling field.
Electrostatic vibrationtoelectric energy conversion. Sen, principles of electric machines and power electronics, wiley, 3rd edition, 20. Developing methods and means for macrosimulation of. Many studies have focused on piezoelectric materials,58 but they are known to have low strength andor low throughput. A universal electromagnetic energy conversion adapter based on a metamaterial absorber authors. Buy electromechanical energy conversion by david c white, herbert h woodson online at alibris. Electromechanical energy conversion is a reversible process and eqs 4. Novel allpurpose highpower matching device for energy. Elements of electromechanical energy conversion 867 electronics switching devices offer energy efficient, userfriendly, and highperformance drives. Electromechanical energy conversion by david c and herbert.
282 135 533 330 777 653 769 747 450 431 350 188 570 402 1334 1149 16 683 95 413 255 445 744 1279 335 721 337 473 951 302 917 1437 1090 352 771 311 976 111