The course introduces electrical machines namely transformers, dc and ac rotating machines, which are, arguably, the most important components of energy and power conversion industry. Krishna vasudevan,department of electrical engineering,iit madras. 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. When the conversion takes place from electrical to. Supercapacitor as an ultrafast energy storage device made from biodegradable agaragar as a novel and lowcost carbon precursor. Energy conversi on principles w e are concerned here with the electromechanical energy conversion pro cess, which takes place through the medium of the electric or magnetic field of the conversion device. Electromechanical energy conversion devices with magnetic field as the coupling medium between electrical and mechanical systems are more common in commercial application. The information presented here is merely a collection by the committee. Lecture notes on renewable energy sources subject code. Wind energy conversion systems department of electrical. 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 devices are ones which have both electrical and mechanical processes. This energy is converted to the energy of magnetic field, which is next converted into mechanical energy. Since numerous types of electromechanical devices are.
A few years ago major segments of the energy conversion industry were settled into a pattern of slow innovation. Electromechanical energy conversions use a magnetic field as the medium of energy conversion introduction 232016. Strictly speaking, a manually operated switch is an electromechanical component due to the mechanical movement causing an electrical output. A residential pv power system enables a homeowner to generate some or all of their daily electrical energy demand on their own roof, exchanging daytime excess power for future energy needs i. A magnetohydrodynamic generator mhd generator is a magnetohydrodynamic converter that utilizes a brayton cycle to transform thermal energy and kinetic energy directly into electricity. Eee309 electromechanical energy conversion principles i. A few examples will show the importance of electrical energy. Electromechanical energy conversion ppl electromechanical energy conversion electrical machine 1 duration. The principle of energy conversion discussed with energy stored in magnetic field. Nptel provides elearning through online web and video courses various streams. Soman overview electrical energy systems types of protection relays introduction evolution of relays circuit breaker what is a circuit breaker. Conversion of solar energy into electrical energy storage. In this chapter, our aim is to explore the basic principles of electromechanical energy conversion. Electromechanical energy conversion, electromechanical energy conversion course, electromechanical energy conversion dersi, course, ders, course notes, ders notu.
In this topic, basics of electrical machines, the principles of electromechanical energy conversion devices and the relations between electric field and magnetic field are. Chapter 3principle of electromechanical energy conversion. Converts electrical energy into mechanical energy or converts mechanical energy into electrical energy. Summary introduction electromechanical relays first generation of relays. These notes has been made by me after watching nptel lectures given by dr. Electromechanical energy conversion 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. Sen, principles of electric machines and power electronics, wiley, 3rd edition, 20. The term reversible implies that the energy can be transferred back and forth between the electrical and the mechanical systems. Electric machinery, fitzgerald, kingsley and umans, mcgrawhill, 7th. Department of electrical engineering, veer surendra sai university of technology burla page 2 disclaimer this document does not claim any originality and cannot be used as a substitute for prescribed textbooks. A multitude of choices and challenges face the modern energy conversion engineer. Electromechanical energy conversion theory is the cornerstone for the analysis of electromechanical motion devices. Principal of electromechanical energy conversion youtube. Electrical engineering in this context also encompasses electronics engineering.
Photovoltaic pv power systems convert sunlight directly into electricity. Pdf conversion of solar energy into electrical energy. Basics of electrical machines electrical machine gate. Transformers, being static, are the easiest of electrical machines and hence they will be dealt with initially after introducing magnetic circuit fundamentals. Purchased electricity is fed into our tvs and is converted to light and sound. Kedare 4 india is ranking 5th in the world based on the installed wind power capacity. Electrical energy conversion by converters, the lost history of the transistor, future electronic power distribution systems, basic strategies in power electronics, power devices, mechanical design and cooling techniques, dcdc converters, linecommutated topologies, voltage source inverters, active compensation.
Thermoelectric generators function like heat engines, but are less bulky and have no moving parts however, tegs are typically more expensive. In this topic, basics of electrical machines, the principles of electromechanical energy conversion devices and the relations between electric field and magnetic field are explained whose real. The growing utilisation of the latter is a decisive prerequisite for a rapid development of industry and agriculture. Mhd generators are different from traditional electric generators in that they operate without moving parts e. The corresponding reactions on the electrical circuits are expressed in terms of the rate of change of the flux linkages. The energy conversion cycles of two machines are oabo and oabco curves shown below.
Electromechanical energy conversion part 1 youtube. This note serves only as an introduction to both electrical machines and power electronics. Electrochemical energy conversion mit student galvanic cells convert different forms of energy chemical fuel, sunlight, mechanical pressure, etc. Energy conversion and power electronics download book. Uses the principle of electromechanical energy conversion. Electrical machines by sambhavi pandey unacademy plus.
Dc, induction and synchronous machines are used extensively for electromechanical energy conversion. Electric machinery, fitzgerald, kingsley and umans, mcgrawhill, 7th ed. Electromechanical energy conversion is a reversible process except for the losses in the system. In this lecture, we are interested in some examples of galvanic cells. Energy released by conversion reactions can be converted to mechanical energy or electricity some reactions are used to convert a primary energy sources to more useful forms of chemically stored energy solid fossil fuels liquid fuels natural gas hydrogen biomass liquid fuels. Ee 3410 electric power electromechanical energy conversion. This is a summary of the main points covered in chapter 3 that has been detailed in many lectures during the course. Textbook developed at mit in energy conversion no thermodynamics. Chapter 1 part 1 electromechanical energy conversion. Our life would be unthinkable without the use of electrical energy.
The field flux linkage is a function of both the current excitation and the mechanical displacement, where the latter is associated with the moliona. In the linear synchronous motor the electric energy is delivered to the system through the stator and rotor winding terminals called electrical ports. Electromechanical energy conversion principles javatpoint. As seen from equation, the torque is zero if l d l q, i. It focuses on the most common devices and systems that an electrical engineer will encounter. Most of the common electromechanical components, such as electric motors and solenoids are used in combination with mechanical parts to provide actuation or movement. If the energy conversion efficiency is defined as follows, calculate r 1 and r 2 input electricalenergy convertedenergy r b o i. Electromechanical energy conversion pdf free download. An early textbook to use the principle of maximum entropy as an approach to thermodynamics. Electromechanical systems introduction as the name suggests, electromechanical systems or devices convert electrical energy into mechanical movement and sometimes vice versa. Gasoline chemical is put into our cars, and with the help of electrical energy from a battery, provides mechanical kinetic energy. Electrical engineering 90 courses linuxpert systems. A thermoelectric generator teg, also called a seebeck generator, is a solid state device that converts heat flux temperature differences directly into electrical energy through a phenomenon called the seebeck effect a form of thermoelectric effect. Dc machine are the electromechanical energy conversion devices which converts either dc power to mechanical power or mechanical power to dc power.
Energy stored in chemical bonds combustion useful power bypass the conversion toheat and mechanical to electrical processes a fuel cell is an electrochemical device in which the chemical energy of a conventional fuel is converted directly and efficiently into low voltage, direct current electrical energy. Electromechanical energy conversion electrical idea. Electron mean free path space charge region single carrier transport warren m. Lecture notes electromechanical energy conversion course. It is producing about 2 billion kwh per year from wind with the average utilization factor of 1175 hours per year. Check out khadija academy which will help you as an electrical engineer with free resources and courses. Energy systems engineering, iitb wind energy conversion systems prof.
Potentialstep amplified thermal electrical energy converter region 1 region 2 potential interface e c1 e f forward structure e c2 e c1 e f reverse structure ict02 sharp interface. Mod01 lec04 singly excited linear motion system youtube. I hope you enjoyed the video, dont forget to subscribe to our channel for more awesome videos. 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. Check out khadija academy which will help you as an electrical. Basic electrical technology is the most common subject and heart core subject to electrical engineers. Ac machines, transformers, rectifiers and inverters, as well as electrical drives and uninterruptible power supplies. The efficiency, voltage regulation and characteristics of these machines will be.