Ac induction motors are also the most common motors used in main powered home appliances. Induction motor theory jerry bednarczyk, pe course content introduction the ac induction motor is well suited to applications requiring constant speed operation. Fall 2005 ee595s electric drive systems 3 voltsperhertz control. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more detail. It consists of an electric motor motors, a transfer mechanism, an electrical energy converter, and a control system. Huge energy savings potential operating centrifugal fans, pumps and compressors vary frequency of electrical supply to an induction motor to vary the motor speed. When synchronous motors are considered, wound field and permanent magnet synchronous motors have higher full load efficiency and power factor than induction motors, but the size and cost of synchronous motors are higher than induction motors for the same rating. Differentiate between the various types of generating electric power stations. Lecture notes in pdf format are available via the school webpage for lecture notes. K a first course on electric drives, wiley eastern limited, 1998. The motor is mounted in a test rig that allows one to control the torque applied to the motor shaft and to measure both rpm and torque.
Induction motor drives starting braking speed control of. Exceptions always require the explicit approval of the author. All we need to do is to keep daxis stator current constant. Tags ida download ida notes industrial drives and applications lecture notes industrial drives and applications notes. Induction machine control and simulation c 2003 james l. As a voltage and a current is applied to the stator winding terminals. Because of this, induction motors are economically efficient. Control of induction motor through stator voltage variable voltage characteristicscontrol of induction motor by ac voltage controllers waveforms speed torque characteristics. The induction motor is made up of the stator, or stationary windings, and the rotor. Simplified steadystateequivalent circuit of induction motor. Mostafa elshahed objectives learn a brief history of the electrical power systems construction. Fall 2005 ee595s electric drive systems 2 overview of strategies voltsperhertz control. Apr 02, 2008 lecture series on basic electrical technology by prof. The rotating magnetic field produced in the stator will create flux in the rotor, hence causing the rotor to rotate.
Although induction motors drives have already overtaken dc drives during the next decade it is still too early to determine if dc drives will eventually be relegated to the history book. The content of the book is essentially based on my lecture notes of one. Lecture notes last update 20160126 paderborn university power electronics and electrical drives. Download link is provided and students can download the anna university ee6601 solid state drives ssd syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials.
Modern power electronics and ac drives by bose free pdf download. The dc motor, the ac induction motor, and the ac synchronous motor. The reason for describing induction motors as constant speed is because normally these motors have a constant speed depending. Chopper fed dc motor drive induction motor drives stator voltage control vf control. Synchronous speed is the speed of rotation of the magnetic field in a rotary machine, and it depends upon the frequency and number poles of the machine. Einstein college of engineering einstein college of engineering an institution affiliated to anna university, tirunelveli sir. Types of power electronic converters and industrial applicationsdrives, electrolysis, heating, welding, static compensators, smps, hvdc power transmission, thyristorized tapped changers and circuit breakers.
Induction motor drives free lecture notesgiven below. Syllabus, question banks, books, lecture notes, important part a 2 marks questions and important part b 16 mark questions, previous years question papers collections. There are two types of induction motors, one with wound type rotor, also called slipring motor and another one with squirrelcage rotor. Download modern power electronics and ac drives by bose in pdf format for. Open and closed loop vf control field weakening mode.
Here an effort has been made to compare different types and the characteristics of electric motor drives used in the electric vehicle. Jun 08, 2019 before discussing, induction motor drives its important to understand and know about induction motors. If the induction motor is operating in the linear magnetic region, the lm is constant. Content 2 preface the course controlled threephase drives is dedicated to the electric drive system. The developed power the output power, and the output torque. Lecture series on basic electrical technology by prof. Fall 2005 ee595s electric drive systems 36 the plan continued achieving 14.
Aug 22, 2014 electrical drives andcontrol lecture notes 1. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. Induction and synchronous motor drives, starting, running, speed control, braking, size and rating of motors short time, intermittent, continuous, mechanical considerations enclosure, bearing transmission of drive, through chain, pulley and gears noise. Stator frame it is the outer most part of the three phase induction motor. Pdf ee6601 solid state drives ssd books, lecture notes. The most popular type is the 3phase, squirrelcage ac induction motor. This final thesis will mostly be dedicated to induction motors but also to synchronous permanent magnet and reluctance motors. Induction, wound rotor, synchronous, pm synchronous and synchronous reluctance machines. For the latter two technologies, we consider the case of threephase power, which is generally preferred over. A yconnected threephase, 415v, 200kw, 50hz, 8pole woundrotor induction motor controls the speed of a pump. It is logical that the least expensive, lowest maintenance type.
Its main function is to support the stator core and the field winding. Home electrical electrical drives and controls electrical drives and controls lecture notes study material pdf. Raman nagar seethaparpanallur tirunelveli department of electrical and electronics engineering me 36 electrical drives and control iii sem mechanical engg. An emf voltage is induced in a conductor if it moves through a magnetic field. Introduction to semiconductors, power electronics, power semiconductor devices, control characteristics. The speed of rotation of an induction motor is fairly constant, but it does vary somewhat with loading. Record all nameplate information for the induction motor. The maximum torque then remains very nearly constant. The rotor will constantly be turning to align its magnetic field with that of the stator field. The reason for describing induction motors as constant speed is because normally these motors have a constant speed depending on the frequency of the supply and the. Pdf direct torque control of induction motor drives. The minimum torque developed by the motor while accelerating from zero speed greater than fullload torque. Electrical drives and traction lecture notes subject code bee for 7th sem.
Variable frequency drives vfds popular speed control devices used in industrial, commercial and residential applications. Here you can download the industrial drives and applications vtu notes pdf ida pdf vtu of as per vtu syllabus. Electric motors and drives fundamentals, types and applications third edition austin hughes senior fellow, school of electronic and electrical engineering. Electrical drives and controls lecture notes study material pdf. Ee6601 solid state drives ssd syllabus unit i drive characteristics electric drive equations governing motor load dynamics steady state stability multi quadrant dynamics. Here you can download the free lecture notes of power semiconductor drives pdf notes psd pdf notes materials with multiple files links to download. Power semiconductor drives notes pdf psd notes pdf book starts with the topics introduction to thyristor controlled drives, single phase semi and fully controlled converters connected to d. Q2 a 120 v shunt motor has the following parameters. Notes for electrical drives ed by verified writer lecture notes, notes, pdf free download, engineering notes, university notes, best pdf notes, semester, sem, year, for all, study material. Lecture series on industrial automation and control by prof.
Letting the rotor speed be r, we see immediately that if. The stator consists of a series of wire windings of very low resistance permanently attached to the motor frame. A force is induced in a conductor that has a current going through it and placed in a magnetic field. Online study material, lecturing notes, assignment, reference, wiki and important questions and answers. The rotor has salient poles and a cage so that it starts like an induction motor, and runs like a synchronous motor. Direct torque control dtc is an emerging technique for controlling pwm inverterfed induction motor im drives. Power electronics is the application of solidstate electronics to the control and conversion of electric power.
Massachusetts institute of technology mit opencourseware. List and describe the more commonly used equipment in an electric substation. They are generally more expensive than induction motor dri ves,but the advantages is that the efficiency is higher,which is tends to lower the life cycle cost. Then, equation 1 can be shown in terms of magnitude as. In general, the induction motor is cheaper and easier to maintain compared to other alternatives. The induction motor is discussed in detail in this unit. Electrical drives and controls lecture notes study. Moreover induction motors are mechanically stronger and require less maintenance. The induction motor always runs at speed less than its synchronous speed. Massachusetts institute of technology department of electrical engineering and computer science 6. Control techniques for electric drives, block diagram representation, transfer functions, transient. Industrial drives and applications vtu notes pdf ida pdf. Vectorcontrolled induction motor drives the previous control strategies good steadystate but poor dynamic response oscillation resulted from the air gap flux vector control fieldoriented control is related to the phasor control of the rotor flux.
Uses soft magnet rotor that is magnetized by the application of current in the stator coils 3. The basic idea of an electric motor is to generate two magnetic fields. The threephase induction motor is the extensively used for various kinds of industrial drives. Singlephase induction motor threephase induction motor singlephase induction motor there are probably more singlephase ac induction motors in use today than the total of all the other types put together. This paper emphasis on the electric motor drives which are integral components of the electric vehicle. Synchronous and asynchronous ac inductionasynchronous motor an induction or asynchronous motor is an ac electric motor in which the electric current in the rotor needed to produce torque is induced by electromagnetic induction from the magnetic field of the stator winding. May 18, 2008 lecture series on industrial automation and control by prof. The sinusoidal stator phase currents fed in the stator coils create a magnetic field.
Lecture 6 three phase induction motors cairo university. Control of induction motor through stator frequency. You should also make a dc measurement of stator winding linetoline resistance using a dmm. The previous control strategies good steadystate but poor.
However, the future decade will surely witness a continued increase in the use of ac motor drives for all variable speed applications. The 3phase set of currents, each of equal magnitude and with a phase. To learn about ac motor drives using variable frequency converters vsi, csi etc unit i. It also refers to a subject of research in electronic and electrical engineering which deals with the design, control, computation and integration of nonlinear, timevarying energyprocessing electronic systems with fast dynamics. The induction motor is the motor most commonly used in agriculture. It allows the precise and quick control of the im flux and torque without calling.
Below we have list all the links as per the modules. Electrical drives and controls lecture notes study material pdf rajeev reddy nareddula. Dynamic model and control of dc, synchronous and induction machines. The single phase induction motor resembles, threephase, squirrelcage motor except that, single phase induction. Fall 2005 ee595s electric drive systems 2 overview of strategies voltsperhertz control constant slip control fieldoriented control. The current is applied to the winding part, and the rotating magnetic field is generated. Pdf ee6351 electrical drives and controls edc books.
Xux, of course, and in a permanent magnet this is usually pictured in terms of. By far the most commonly used ac motor is the induction motor. A 480v, 60 hz, 6pole, threephase, deltaconnected induction motor has the following parameters. Squirrel cage wound rotor with slip rings the rotating magnetic field the basic idea of an electric motor is to generate two magnetic fields. Development of the induction motor equivalent circuit. Due to the lag between the flux current in the rotor. In very simple words induction motors can be described as a threephase, selfstarting constant speed ac motors. Before discussing, induction motor drives its important to understand and know about induction motors.
Power semiconductor drives pdf notes psd pdf notes. For a long time, induction motors were known as electric machines difficult to control and were used only in electric drives with constant speed. It consists of stator core, stator winding, gap and rotor core. Modern power electronics and ac drives by bose free pdf. Download link is provided and students can download the anna university ee6351 electrical drives and controls edc syllabus question bank lecture notes syllabus part a 2 marks with answers part b 16 marks question bank with answer, all the materials are listed below for the students to make use of it and score good maximum marks with our study materials. The author appreciates hints, related to mistakes or inadequacies.
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