On this topic, i will explain in details about 3 phase induction motor construction before we talked about parts of the electric motor generally but on this topic, we will go deep for 3 phase induction motor construction only. Induction motors work on the principle of electromagnetic induction. Working principle of 3 phase induction motor is explained and from this, why induction motor is self starting, why rotor rotates in same direction as the rotating field are also answered. An induction motor can be defined as the ac electric motor device in which a power source fed by the alternating current with the help of a primary winding. More files in the power electronics control community. The major difference between them is that transformer is static in nature i. Induction motor works on the principle of electromagnetic induction. The base speed of the induction motor is directly proportional to the supply frequency and the number of poles of the motor. Induction motor working principle your electrical guide. When a three phase supply is given to the three phase stator winding, a rotating magnetic field of constant magnitude is produced. Introduction types of electrical machines types of 3 ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. Making use of three phase systems, fundamental devices are used to produce a. A 3 phase induction motor can be used for different applications with various speed and load requirements.
Construction and working of 3 phase induction motor on ship. Differentiate between the various types of generating electric power stations. Two digital multimeters and fluke power quality meter with banana cables from the. Three phase induction motor construction your electrical guide. Almost 80% of the mechanical power used by industries is provided by three phase induction motors because of its simple and rugged construction, low cost, good operating characteristics, the absence of commutator and good speed regulation. A 3 phase induction motor derives its name from the fact that the rotor current is induced by the magnetic feild, instead of electrical connections. This paper explores the construction process of a linear induction motor lim, the basic concepts behind key aspects of linear induction machines construction and the testing process of a working. Types, construction and working of 3 phase induction motor. Induction motor seminar ppt, pdf report study mafia.
Electric motor electric motor construction of induction motors. In this chapter, we shall focus our attention on the construction. Jan 15, 2014 watch this video to understand the working principals of the three phase induction motors. Due to this current, a rotating magnetic field of constant amplitude and a constant speed is set up in the air gap between stator and rotor. When three phase supply is given to the stator winding, a rotating magnetic field of constant magnetic field is produced. The working of the three phase induction motor is based on the principle of electromagnetic induction. As previously, we have covered a lot of important topics. We also discuss the construction of a three phase motor including its.
Construction of a single phase induction motor is similar to the construction of three phase induction motor having squirrel cage rotor, except that the stator is wound for single phase supply. To measure the inrush current when the motor starts. E6581595 2 i limits in purpose this inverter is used for controlling speeds of three phase induction motors in general industrial use. Let us discuss on basic information about this motor and its special controlling technique of svpwm. A single phase induction motor is inherently not selfstaring can be shown easily. In this article, i am discussing about three phase induction motor construction. Kanpur, india design of a three phase squirrel cage induction motor for electric propulsion system ravi prakash,mohammad junaidakhtar, r. 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.
The ac induction motor is the most used electrical motor in industrial applications worldwide. Induction motor, also known as asynchronous motor, is a kind of ac electric motor. Disassembly and assembly of motors three phase induction. Like any electric motor, a 3phase induction motor has a stator and rotor. Design of a three phase squirrel cage induction motor for. Construction of three phase induction motor electrical4u. Third international conference on advances in control and optimization of dynamical systems march 15, 2014. Let see the construction of squirrel cage induction motor. Optimization design of three phase induction motor is formulated as a nonlinear multivariable programming problem to meet the above requirements. You should also make a dc measurement of stator winding linetoline resistance.
The most common type of ac motor being used throughout the work today is the induction motor. Vf control a discussion of induction motor control theory is beyond the scope of this document. Working principle of 3 phase induction motor eduction motor works on the principle of electromagnetic induction. If a set of three phase current is added to these three coils. The main construction of induction motor is composed of two parts stator and rotor. Three phase induction motor works under the principle of electromagnetic induction working. Induction motor working principle when a three phase stator winding of an induction motor is connected to the ac supply, current starts flowing in the stator conductors. Parida department of electrical engineering national institute of technology, silchar,assam, india email. Load tests on a three phase induction motor and measurement of the inrush current objectives.
If you continue browsing the site, you agree to the use of cookies on this website. The speed of rotating magnetic field is synchronous speed, n s r. Apr 02, 2020 ppt three phase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Jan 05, 2016 speed control we have seen that to operate eyciently an induction motor must run with a small slip. The model created by rmxprt will then be used as an input for empulse as a basis for performing more detailed analysis and for increasing the accuracy of the performance pre. The three phase induction motor is the most widely used electrical motor. We will mention here only the salient points of vf control. Stator is also provided with a starting winding which is used only for starting purpose.
Working principle of 3phase induction motor electrical. A threephase induction motor problem enginuity systems. Learn what a three phase induction motor is, how it is constructed, and its working principle. Working principle of three phase induction motor electrical simple.
A three phase, 12 pole, salient pole alternator is coupled to a diesel engine running at 500 rpm. In this work a conventional three phase squirrelcage type induction motor with specifications 10 hp, 415v, stardelta connected and 4 poles is chosen for comparison with our motor, which is designed for good efficiency. The stator of both motors is same and the rotor is different. One single phase wattmeter plus miscellaneous apparatus as needed.
The rotor is separated from the stator by a small airgap which ranges from 0. A simple explanation of how a 3 phase induction motor works. Feb 15, 2017 induction motors are the most commonly used motors in many applications. You will be using the labvolt trainer model no 8020. Standard wire used for winding 3 17 swg limitations. A 3 phase induction motor has two main parts i stator and ii rotor. According to the different power phase, it can be divided into single phase and three phase. The topic lies under the basic electrical and electronics engineering course that covers various other. Applications of three phase induction motors of size varying from half a kilowatt to thousands of kilowatts are numerous. These are also called as asynchronous motors because an induction motor always runs at a speed lower than synchronous speed. Record all nameplate information for the induction motor. Single phase input model is output by the inverter as three phase output and cannot drive a single phase motor. Like all motors, a three phase induction motor contains a stator the stationary part and a rotor which rotates.
Free download induction motor seminar ppt, pdf report. Construction of three phase linear induction motor. Learn a brief history of the electrical power systems construction. Although single phase induction motor is more simple in construction and is cheaper than a 3 phase induction motor of the same frame size, it is less efficient and it operates at lower power factor. Induction motor fault heading fault causes remedies induction motor a no supply voltage b driven equipment jam c motor shaft jammed.
Construction and operation of three phase induction motor scribd. Induction motors may be single phase or three phase. They have very simple and rugged almost unbreakable construction. The two factors that determine the speed of the weld, are the supply. Slip rings are made of high quality phosphor bronze and are of molded construction. Three phase induction motor construction electrical academia. Induction machines are also called asynchronous machines i. The model 8020 dissectible machines is an electromechanical ems trainer that provides handson instruction in the construction and operation of rotating machines. Most of the industries prefer these type of motor due to less maintenance cost, higher efficiency, and their lightweight construction. The theory used in the work was collected by studying literature on how electrical motors work, and by simplifying the. An induction motor or asynchronous motor is an ac electric motor in which the electric current. Squirrel cage rotor construction, showing only the center three laminations.
Induction motors are by ac switchboard and it is a. Working principle of 3 phase induction motor youtube. In addition, there are end bells, bearings, motor frame and other components. Aug 02, 2016 the working principle of three phase induction motor is basically based on the principle of mutual induction as in case of transformer. Three phase induction motors are designed to meet high starting torque, good operating efficiency and power factor. Maintenance and troubleshooting three phase induction motor. The very first thing that you should do before starting any type of maintenance on a motor is a visual inspection, a lot of times the trouble can be found just by looking, because if the problem is that bad then it should be very obvious by observation. Tecowestinghouse motor company po box 227 786800277.
The interaction of the magnetic fields creates the torque that rotates the rotor and the load. Normally, we use the motors in industrial drives because they are rugged, reliable and economical. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. It is aimed to provide three windings in the same stator core. Lamination is necessary since a voltage is induced along the axial length of the steel as well as in the stator conductors. For three phase induction motor, the windings uvw with completely the same 3 phase structure are placed in the stator core. What we will be working on today is the disassembly and assembly of an a. Explain the construction, working principle and types of three phase induction motor slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Like any electric motor, a 3 phase induction motor has a stator and a rotor. Download 3 phase induction motor powerpoint presentation. Nov 27, 2019 the three phase induction motor is the most widely used electrical motor. The electromagnetic induction is the phenomenon in which the electromotive force induces across the electrical conductor when it is placed in a.
Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. A stator consists of steel frame that supports a hollow cylindrical core of. This document is highly rated by electrical engineering ee students and has been viewed 2439 times. Single phase machines are restricted to small power levels. Working principle of 3 phase squirrel cage induction motor. The 3 phase set of currents, each of equal magnitude and with a phase. Designing of three phase squirrel cage induction motor for.
Other motors that are included are 1 phase induction motors, permanent synchronous motors and synchronous reluctance motors. Construction and operation of three phase induction motor free download as pdf file. Thus, as an electrical and electronics engineer or hobbyist we must know a few basic concepts about these types of machines we use regularly in our life. Each contains electrical windings that carry current and thus creates a magnetic field.
List and describe the more commonly used equipment in an electric substation. The video tutorial is essentially a part of the basic electrical and electronics engineering. It supplies an induction motor ich has a full load speed of 144wh 0 rpm. Vf control of 3phase induction motors using pic16f7x7. Other members of the family are the directcurrent dc motor or generator, the induction motor or generator, and a number of derivatives of all these three. Working principle of an induction motor the motor which works on the principle of electromagnetic induction is known as the induction motor. Theory and analysis of three phase induction motor using. Working principle of three phase induction motor electrical. It follows that any eycient method of speed control must be based on varying the synchronous speed of the weld, rather than the slip. The stator carries a 3phase winding called stator winding while the rotor carries a short circuited winding called rotor winding.
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. When three phase stator winding of an induction motor is energized from a 3 phase supply, a rotating magnetic field is set up which rotates around the stator at synchronous speed n s. They run at a constant speed from noload to the full load. Electric motor construction of induction motors britannica. Whenever we say induction machine we mean to say induction motor.
In this module we will be discussing the three phase induction machine. Types, construction and principle of operation, 3 phase induction motor, general phasor diagram, equivalent circuit, power and. The stator frame consists of laminations of silicon steel, usually with a thickness of about 0. Oct 28, 2016 this file contains the model of three phase induction motor in dq reference using matlab r2009a. Starting method for induction motors a 3 phase induction motor is theoretically self starting. The basic idea of an electric motor is to generate two magnetic fields. Construction and working of 3 phase induction motor scribd. The stator carries a 3 phase winding called stator winding while the rotor carries a shortcircuited winding called rotor winding only the stator winding is fed from the 3 phase supply. When a three phase supply is given to the three phase stator winding, a rotating magnetic field of constant magnitude is produced as discussed earlier. The performance over a wide range of applications makes three phase induction motors accountable for 85 percent of the installed capacity of the industrial driving systems. Construction, working one of the advantages of the slipring motor is that resistance may be inserted in the rotor circuit to obtain high starting torque at low starting current and then cut out to obtain optimum running conditions.
Pdf construction and working of brushless dc motors. A three phase induction motor runs on a three phase ac supply. The single phase motor stator has a laminated iron core with two windings arranged perpendicularly. A three phase induction motor problem this application note describes how to set up, solve, and analyze the results of a twopole, three phase induction motor using rmxprt. An induction motor also known as an asynchronous motor is a commonly used ac electric motor. Pdf construction of three phase linear induction motor. For design purpose, a 3kw, 415 v three phase induction motor is restructured to 2. Mostafa elshahed objectives learn a brief history of the electrical power systems construction. To obtain the load performance characteristics of a three phase squirrelcage induction motor. What is the three phase induction motor working principle. Working principal of three phase induction motor electrical.
The first ac commutatorfree threephase induction motors were. Three phase induction motor construction and working. The single phase induction motor resembles, three phase, squirrelcage motor except that, single phase induction motor has no starting torque and some special arrangement have to be made to make it as self starting. Find the percentage slip and number of poles of the induction motor. Single phase induction motor the single phase induction machine is the most frequently used motor for refrigerators, washing machines, clocks, drills, compressors, pumps, and so forth. The stator of an induction motor consists of 3 phase windings, which when connected to a 3 phase supply creates a rotating magnetic field. Today we are going to made available a powerpoint presentation file for all. An electrical motor is a device that has brought about one of the biggest advancements in the fields of engineering and technology ever since the invention.
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