Energy conversion device energy input energy output energy output energy input 1st law useful energy output energy input 2nd law figure 41. 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 syste. Download citation electromechanical energy conversion electrical machines. Mit opencourseware for any use or distribution of this. The energy conversion for waterpowered systems is quite efficient, as it is a singlestep conversion and water is a very dense fluid, so it can impart a great deal of energy to the turbines. The stator is a stationary housing, which has coils of wire mounted in a certain pattern. In general, electromechanical energy conversion devices can be divided into three categories. A reversible process cycle is suggested for electromechanical energy conversion using the dielectric elastomer membrane, analogous to the carnot cycle for a heat engine. For the same transformer used in the previous problems, calculate the efficiency at rated current and 0. Electromechanical energy conversion theory is the cornerstone for the analysis of electromechanical motion devices. When we speak of electromechanical energy conversion, however, we mean either the conversion of electric energy into mechanical energy or vice versa.
The generator is an electromechanical component, which converts the mechanical power into electrical power. The energy conversion process is classically performed using the nuclear fission of the uranium. Three categories of electromechanical energy conversion devices. International journal of renewable energy research, ijrer s. Electromechanical energy devices and power systems pdf.
The rotor is the rotating part of the generator and is responsible for the magnetic field of the generator. Electromechanical actuators, on other hand, offer considerable energy savings in the majority of applications because they use power only when they are performing work. Determination of mechanical force, mechanical energy, torque equation, doubly excited systems. As long as engineers are concerned with making the electrical sciences serve human needs, they will be involved with electromechanical phenomena. Motor action is defined by a conversion of electrical power to mech anical power.
Generators although, it is not a emec device, we will also cover transformers, which is a critical component in transmission of energy. The book commences with magneticcircuit calculations for devices and machines, fieldplotting methods and principles of electro mechanical energy conversion for which the magnetic fields serve as reservoirs. Electromechanical energy devices and power systems by zia a. Energy conversion an overview sciencedirect topics. Publishers pdf, also known as version of record includes final page, issue and volume. For motor effective analysis, the total electric and magnetic fields can be used to determine the total power flow through the energy conversion. Class notes on electrical machines i anna university chennai syllabus. We all know that energy exists in many forms, and we use numerous devices on a daily basis that convert one form of energy into another. Electromechanical systems introduction as the name suggests, electromechanical systems or devices convert electrical energy into mechanical movement and sometimes vice versa. 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. Electromechanical energy conversion is similar to the second step of the thermomechanical processes described above for electricity generation. In its simplest form, a variablereluctance stepper motor consists of three cascaded, singlephase reluctance motors with rotors on a common shaft and arranged. Transducers for measurement and control, which transform signals of different forms.
The speed of disk is directly proportional to the amount of load applied. Simply click on the topic name to download the ebooks of that topic. When we speak of electromechanical energy conversion, however, we mean either the conversion of electric. C device electromechanical relay assume mobile armature is initially at open position when the coil is excited by it, t is produced in m.
Principles of electromechanical energy conversionintroduction, flow of energy in electromechanical devices, energy in magnetic systems defining energy and co energy, singly excited systems. Both electric motor and generator have undergone extensive research and. The electric energy generated purchased by consumers for different needs. Transducers for measurement and control small motion transform the signals of different forms.
Principles of electromechanical energy conversionintroduction, flow of energy in electromechanical devices, energy in magnetic systems defining energy and coenergy, singly excited systems. Rather than having to generate steam to push the turbine blades, the preexisting movement of wind or water drive the turbine. Their initial investment may be larger but two important parameters justify their use. Note that for flowbased resources like wind, solar, hydro, and geothermal, extraction and conversion happen simultaneously. A device would be known as a generator if it convert mechanical energy into electrical energy, or as a motor if it.
Electromechanical component an overview sciencedirect. Chapter 6 basic principles of electromechanical energy conversion. Electromechanical energy devices and power systems. Device for converting pressure fluctuations prevailing in fluid systems into electrical energy power de19601917a1 en 19960115. The energy conversion process is classically performed using the. 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. Us3247406a electromechanical energy converting device. Since electromechanical energy conversion can occur only by the interaction of.
As their name suggest, electromechanical energy meters are the combination of mechanical and electrical technology. Introduction ee361 electromechanical energy conversion i. Electromechanical energy conversion substituting f from the equation of motion dx 2 dx we. Lighting indooroutdoor cfl, incandescent, led, halogen heating electric water heaters, clothes dryers, electric stoves and ovens power supply of electronic devices computers.
A novel threephase axialfield modular variable reluctance motor. Strictly speaking, a manually operated switch is an electromechanical component due to the mechanical movement causing an electrical output. The efficiency of an energy conversion device is a quantitative expression of this balance between energy input and energy output. The system performance design specifications address mainly the gas pressures, temperatures, and flow rates inside the engine. Examples are microphones, pickups, and speakers force producing devices linear motion devices, which produce forces mostly for linear motion drives, such as. Electromechanical energy engineering university of. There were no books to fit this trend, and using two books was uneconomical and confusing.
Though this is true, the term is usually understood to refer to devices which involve an electrical signal to create. Energy stored in 1 gallons of gasoline is 35 kwhr or roundingup 40 kwhr electric vehicles are more economical per mile traveled, however, they can travel fewer miles since the batteries store less energy per kg than fuel does. Electronic control of electromechanical energy conversion in. Advances during the past two decades in use of highpowered and fastacting solidstate devices has advanced the state of the art of motor control and excitation systems for alternators.
A mechanical disk present inside the meter rotates when the load applied. Electromechanical devices are ones which have both electrical and mechanical processes. Working principle of electromechanical energy meters. Eee 343 electromechanical devices and machines i introduces students to the basics of electromechanical energy conversion with emphasis on d. Aug 02, 2012 electromechanical energy conversion substituting f from the equation of motion dx 2 dx we. For the first time in india we bring for our users lecture notes, presentations and ebooks covering subjectwise full semester syllabus. In the linear synchronous motor the electric energy is delivered to the system through the stator and rotor winding terminals called electrical ports. Electromechanical devices and machines i eee 343 department. Schematic representation of an energy conversion device.
An electromechanical generator comprising an electromechanical device for converting mechanical vibrational energy into electrical energy, the electromechanical device having a vibratable mass adapted to resonate with an oscillation amplitude at a frequency and a regulator for regulating the oscillation amplitude to a value not greater than a maximum threshold. These require the explanation of harmonic torques in motors, as well as the stability of machines. Electromechanical energy conversion objective questions. Electromechanical energy devices and power systems by zia. Energy conversi on principles w e are concerned here with the electromechanicalenergyconversion pro cess, which takes place through the medium of the electric or magnetic field of the conversion device. Electromechanical energy conversion with dynamics of machines. Elements of electromechanical energy conversion 867 electronics switching devices offer energy efficient, userfriendly, and highperformance drives. As the curriculums of electrical engineering programs became over crowded, many schools began combining electromechanical energy conversion and power systems analysis courses. This book covers the necessary material at the undergraduate level and could serve as a terminal course in electrical machinery syllabus. Electromechanical energy conversion free ebooks download.
Pdf a poynting vector approach to electromechanical energy. Produce forces mostly for linear motion drives, example. For any use or distribution of this textbook, please cite as follows. Electric machinery, fitzgerald, kingsley and umans, mcgrawhill, 7th ed. Electromechanical energy conversion with dynamics of. Electromechanical energy meters engineer experiences. This energy is converted to the energy of magnetic field, which is next converted into mechanical energy. Electromechanical energy conversion free download as powerpoint presentation. Elements of electromechanical energy conversion 867 electronics switching devices offer energyefficient, userfriendly, and highperformance drives. Download file pdf electromechanical energy conversion objective questions electromechanical energy conversion objective questions as recognized, adventure as competently as experience practically lesson, amusement, as skillfully as arrangement can be gotten by just checking out a ebook electromechanical energy conversion objective. Energy stored in magnetic field, electromagnetic torque, generated e.
Us7453163b2 electromechanical generator for, and method of. Electric generator mechanical energy into electrical energy 2. A thorough and understandable treatment of the topic, it introduces different energy sources and various electric energy conversion techniques. Most of the common electromechanical components, such as electric motors and solenoids are used in combination with mechanical parts to provide actuation or movement. The electromechanical energy laboratory collaborates closely with the electromechanical research group.
Electromechanical phase transition in dielectric elastomers. This book covers the necessary material at the undergraduate level and could serve as a terminal. In this website, i will publish my personal course notes for 3rd year ee 361 electromechanical energy conversioni course metu, 2014. Pneumatics and hydraulics also go through a twostep energy conversion process that results in relatively low energy efficiency. Choosing between electromechanical and fluid power linear. Jun 06, 2017 electromechanical energy conversion 1. Electric motor electrical energy into mechanical energy 3. Sen, principles of electric machines and power electronics, wiley, 3rd edition, 20. Moreover, a diesel engine is a thermodynamic energy system which produces power by a working fluid medium. 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. We will cover methods for electromechanical energy conversion emec, which can be in two ways. For more information about the course, please visit the course website ill try to update course notes every week. Device for converting pressure fluctuations prevailing in fluid systems into electrical energy power de19601917a1 en. Electromechanical energy conversion linkedin slideshare.
The starting point for understanding this theory is the primitive machine. Presents an overview of the electric power system and its components. Advanced energy system analysis and design require using both the thermodynamic first law and second law. Efficiency ee361 electromechanical energy conversion i. Electromechanical component an overview sciencedirect topics. Since the energystorage system is lossless, it is a simple matter to write that the time rate of change of wild, the. Freepiston engine and method for the conversion of energy stored in fuel into electrical energy in a freepiston engine de4403180c1 en 19940202.
Ee 3410 electric power electromechanical energy conversion. Electromechanical energy conversion white, david cwoodson, herbert h. Reviews circuit and power concepts in electrical circuits. The nuclear energy is considered a clean source that can produce a massive amount of thermal energy. Us7453163b2 electromechanical generator for, and method.
365 186 878 116 1621 124 773 1225 95 658 1192 1353 366 1137 324 1222 80 483 1225 1083 1376 8 1621 1559 846 1647 1369 265 1218 349 1471 1146 381 676 528 1092 567 135 555