The basic idea of an electric motor is to generate two magnetic fields. Nov 27, 2019 thus from the working principle of three phase induction motor, it may be observed that the rotor speed should not reach the synchronous speed produced by the stator. A 3 phase induction motor can be used for different applications with various speed and load requirements. Ppt threephase induction motor electrical engineering ee. Ppt threephase induction motor electrical engineering. For reason of economy, most houses, offices and also rural areas are supplied with single phase a. Induction motor basics, single phase and three phase. Electrical machines 3 pdf notes em iii notes pdf smartzworld.
The above value becomes somewhat larger with small singlephase motors. Nov 03, 2019 there are basically two types of induction motor. It supplies an induction motor ich has a full load speed of 144wh 0 rpm. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. At the end of the lecture, student should be able to. Induction motor 1 chapter 3 induction motor bee23 electrical machine power system 2 learning outcomes. Jun 10, 2017 in this video basic of construction and working principle of 3 phase induction motor is explained with the help of 3d animation. Then, equation 1 can be shown in terms of magnitude as. Single phase induction motors arenot a selfstarting motor, and three phase induction motor are a selfstarting motor. Vf speed control of 3 phase induction motor using space. The electrical machines 3 notes pdf em iii notes pdf book starts with the topics covering constructional features of round rotor and salient pole machines, suppression of harmonics, regulation. Apr 12, 2020 ppt threephase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Three phase induction motor drive using igbts and constant v.
Note down the machine ratings and calculate rated current of the machine noload test. Induction machines 1 introduction the induction machine was invented by nikola tesla in 1888. Dec 29, 2017 apr 12, 2020 ppt three phase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. And generally we will find it is a 4 pole machine, but the magnetic field. Starting of 3 phase induction motors, high starting. One motor is the called the main motor, and another motor is called the auxiliary motor. A repulsion motor is a type of electric motor which runs on alternating current ac. The three phase induction motor is the extensively used for various kinds of industrial drives. Understand the principle and the nature of single phase and 3 phase induction machines. It is the diagrammatic representation of the performance of the induction motor. To understand the rotations of magnetic field consider a 2pole 3phase stator as.
Starting of 3 phase induction motors, high starting torque motors, speed control, rheostatic method, pole changing method cascade control of speed, double cage induction motor, cogging and crawling of induction motor, induction generator. The adobe flash plugin is needed to view this content. Phase wound induction motor slipring induction motor. Pdf modelling of the threephase induction motor using. Thus from the working principle of three phase induction motor, it may be observed that the rotor speed should not reach the synchronous speed produced by the stator. A three phase, 12 pole, salient pole alternator is coupled to a diesel engine running at 500 rpm. Electrical engineering basic electrical technology nptel.
Kirloskar brothers limited an overview of manufacturing units of kbl k i r l o s k a r va d i, m a h a r a s h t r a s h ri v a l, m a h a r a s h t r a d e w a s, m a d h y a p r a d e s h k o n d h a p u r i, m a h a r a s h t r a 02. The rotor will constantly be turning to align its magnetic field with that of the stator field. Mostafa elshahed objectives learn a brief history of the electrical power systems construction. Slip of a power induction motor is 2 to 3 % when the motor is operated under the rated load. Three phase induction motor and performance targets the basic considerations for an. Introduction this application note describes the design of a 3phase ac induction motor drive with volts per hertz control in closedloop vhz cl. Circuit diagram for noload and blockedrotor test on 3 phase induction motor a. Noload and blocked rotor test on an induction machine aim.
View notes l30nkdet ee nptel from electrical ee212 at international institute of information technology. List and describe the more commonly used equipment in an electric substation. The model is based on twoaxis theory of revolving frame. Synchronous motors are often directcoupled to the load and may share a common shaft and bearings with the load. Threephase induction motor, cage and wound slipring rotor, synchronous and rotor speed, slip, induced voltages in stator winding and rotor bar. In this case, power flows from the mechanical system, to the rotor circuit, then across the air gap to the stator circuit and external electrical system. As with a three phase induction motor, synchronous motor rotation is changed by reversing any two stator leads.
Characteristics of induction motors nidec corporation. Module 8 threephase induction motor version 2 ee iit, kharagpur lesson. Fall 2005 ee595s electric drive systems 3 voltsperhertz control history advantages disadvantages. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy to mechanical energy, and vice versa. If the induction motor is operating in the linear magnetic region, the lm is constant. Simplified steadystateequivalent circuit of induction motor. Ppt single phase induction powerpoint presentation free to download id. Ac induction motors are also the most common motors used in main powered home appliances. It was formerly used as a traction motor for electric trains but has been. The construction of the circle diagram is based on the approximate equivalent circuit shown below. Find the percentage slip and number of poles of the induction motor. Noload and blocked rotor test on an induction machine.
Ppt single phase induction powerpoint presentation. You should also make a dc measurement of stator winding linetoline resistance. Introduction types of electrical machines types of 3 ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. Differentiate between the various types of generating electric power stations. However, single phase induction motors does not have self starting torque and are made to. All we need to do is to keep daxis stator current constant. Slip of a power induction motor is 2 to 3% when the motor is operated under the rated load. Lecture series on basic electrical technology by prof. Both types have similar constructed rotor, but they differ in construction of rotor. Induction machines guru nanak dev engineering college.
Like synchronous machine, the stator winding of an induction machine is. The 3phase set of currents, each of equal magnitude and with a phase. This paper proposes an alternative methodology for estimating the speed of a three phase induction motor driven by a voltage source inverter, using space vector. The 3 phase set of currents, each of equal magnitude and with a phase. One single phase wattmeter plus miscellaneous apparatus as needed. Design of a three phase squirrel cage induction motor for. Single phase machines are restricted to small power levels. In this module we will be discussing the three phase induction machine. Record all nameplate information for the induction motor. Module 8 threephase induction motor version 2 ee iit, kharagpur lesson 29 rotating magnetic field in threephase induction. Circle diagram of an induction motor its construction.
Apr 12, 2020 ppt three phase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Starting methods for singlephase induction motor nptel. In this video basic of construction and working principle of 3 phase induction motor is explained with the help of 3d animation. Apr 02, 2008 lecture series on basic electrical technology by prof. Pdf on oct 1, 2016, sachin hegde and others published speed. The above value becomes somewhat larger with small single phase motors. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i.
Circle diagram of an induction motor the circle diagram of an induction motor is very useful to study its performance under all operating conditions. Pdf speed control of induction motor using pi and vf. It is a 16 bit highperformance digital signal controller dsc. This paper describes a generalized simulation model of the threephase induction motor using the simulink software package of matlab. Pdf speed control of 3phase induction motor using volthertz. Perform an analysis on induction machines which is the most rugged and the most. In this method of speed control of three phase induction motor, the two three phase induction motors are connected on a common shaft and hence called cascaded motor. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more detail. Three phase induction motors authorstream presentation. Three phase flange mounted ac induction motors dimensions is 2223 60072 1 specification for energy efficient three phase induction motoris 12615 class of insulation is 1271 60085 conformance to standards. Nptel, online courses and certification, learn for free. There are single phase induction motors and three phase induction motors. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. Similarly, example 2 is a 3 phase, 6 pole, 50 hertz induction motor has.
Methods of starting three phase induction motors as we know, once a supply is connected to a three phase induction motor a rotating magnetic field will be set up in the stator, this will link and cut the rotor bars which in turn will induce rotor currents and create a rotor field which will interact with the stator field and produce rotation. Just like any other motor, a 3 phase induction motor also consists of a stator and a rotor. What is common to all the members of this family is that the basic physical process involved in their operation is the conversion of electromagnetic energy. A 3phase induction motor with synchronous speed of rev per minute develops 5 mechanical.
Speed control of three phase induction motor electrical4u. There are two basic reasons for the use of single phase motors rather than 3 phase motors. This document is highly rated by electrical engineering ee students and has been viewed 2470 times. Home category electrical engineering mcq questions and answers 3 phase induction motors 1 the frequency of the induced emf in an induction motor is a. In a three phase induction machine, there are three sets of windings phase a winding. The major difference between them is that transformer is static in nature i. Design of a three phase squirrel cage induction motor for electric propulsion system. The speed control of three phase induction motor is essential because the motor control industry is a dominant sector. There are two basic reasons for the use of singlephase motors rather than 3phase motors. View notes l29nkdet ee nptel from eso 203 at iit kanpur. Phase induction motors capacitorstart induction motor dynamic and steadystate performance of a capacitorstart singlephase induction motor splitphase induction. Fall 2005 ee595s electric drive systems 36 the plan continued achieving 14.
The staring torque of induction motor is very high which makes motor useful for operations where load is applied before the starting of the motor. Single phase induction motor speed control this project is designed to control the speed of a singlephase induction motor by using operating knob. This paper presents design and analysis of a three phase induction motor drive using igbt. Kirloskar indus3 series three phase induction motors are specially designed in accordance with.
Threephase induction motors authorstream presentation. Fall 2005 ee595s electric drive systems 4 voltsperhertz control b iacdeisa. Learn for free, pay a small fee for exam and get a certificate. Here you can download the free lecture notes of electrical machines 3 pdf notes em iii notes pdf materials with multiple file links to download. It is based on freescales 56f800e microcontrollers. There are two types of rotors which are employed in 3 phase induction motor. The types of induction motor depend upon the input supply. And if it is answers generator it will be just above 1,500 rmp we will not discuss about induction generator only little about motor right. Lecture 6 three phase induction motors cairo university. If the speeds become equal, there would be no such relative speed, so no emf induced in the rotor, and no current would be flowing, and therefore no torque would be generated. So, now principle of induction motor right so, the operation of three phase induction.
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