Induction motor maintenance february 17, 2019 february 24, 2012 by electrical4u maintenance as the name suggests it is the action necessary for retaining or restoring a piece of equipment or machine to the specified operable condition to achieve its maximum useful life. Similarly in this post, we will made a powerpoint file accessible for all. An electrical motor is an electromechanical device which converts electrical energy into mechanical energy. Both the ends are connected with bearings for free rotation means of reduced friction. Synchronous motors are special types of motors used in constant speed applications, whereas most of the motors used in the industrial applications are of induction type. This paper presents load characteristics of a threephase induction motor model core calculated with the. One singlephase wattmeter plus miscellaneous apparatus as needed. The rotor will constantly be turning to align its magnetic field with that of the stator field. This document is highly rated by electrical engineering ee students and has been viewed 787 times. Induction motors introduction threephase induction motors are the most common and frequently encountered machines in industry simple design, rugged, lowprice, easy. 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. A stator winding is placed in the stator of induction motor and the three phase supply is given to it.
Dc motors depend either on mechanical or electronic commutation to create rotating magnetic fields. Like any other electrical motor, induction motors have two main parts the rotor and the stator. An inverter is nothing but a motor control which is used in adjusting the speed of an ac induction motor. Induction motors ppt free download as powerpoint presentation.
Speed control of three phase induction motor ppt play ppt. The working of the threephase induction motor is based on the principle of electromagnetic induction. Three phase induction motor department of electrical. Free download induction motor seminar ppt, pdf report.
Threephase induction motor protection systems and its. There are two types of rotors which are employed in 3 phase induction motor. You should also make a dc measurement of stator winding linetoline resistance. Ppt induction motor powerpoint presentation free to. A simple explanation of how a 3 phase induction motor works. A free powerpoint ppt presentation displayed as a flash slide show on id. Several additional components are necessary to operate the singlephase motor. This article concentrates only on a threephase induction motor and its protection.
Applications of threephase induction motors of size varying from half a kilowatt to thousands of kilowatts are numerous. Like any electric motor, a 3phase induction motor has a stator and a rotor. Ppt three phase induction motor powerpoint presentation, free. Scribd is the worlds largest social reading and publishing site. Understand the principle and the nature of single phase and 3 phase induction machines. Presentation on induction motor linkedin slideshare. A threephase ac induction motor is the only type where the rotating magnetic field is created naturally in the stator because of the nature of the supply. Efficiency of induction motor when the induction motor is connected to a 3phase supply, current flows in the primary circuit, heat is produced in the stator conductor as copper loss no load current also flows and further power is lost as iron losses power than flow through the air gap as magnetic field energy, there will be no loss in the air gap further energy is lost in the rotor winding as. 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.
Stator is made up of number of stampings in which different slots are. Historythe induction motor with a wrapped rotor wasinvented by nikola tesla in. Apr 01, 2020 chapter 3 phase induction motor drives, ppt, electrical machines, semester, engineering electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Despite the fact that the threephase motor has more phases than the singlephase motor, the singlephase motor is a much more complex machine. A portion of rotating magnetic field in a threephase. For this example, refer to the motor equivalent circuit and calculations described above. Threephase induction motors are the most common and. Induction motor seminar ppt, pdf report study mafia. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. Three phase induction motor powerpoint ppt presentation. The basic idea of an electric motor is to generate two magnetic fields. Srms are made up of laminated stator and rotor cores with ns2mq poles on the stator and nr poles on the rotor. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more detail. The 3phase set of currents, each of equal magnitude and with a phase.
An induction motor is also called asynchronous motor as it runs at a speed other than the synchronous speed. Induction motor free download as powerpoint presentation. In this video basic of construction and working principle of 3 phase induction motor is explained with the help of 3d animation. A three phase supply is given to the stator of the induction motor. Today we are going to made available a powerpoint presentation file for all. When threephase 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 ns. Outer frame it is the outer body of the of the motor. Perform an analysis on induction machines which is the most rugged and the most. As the name indicates stator is a stationary part of induction motor. The threephase induction motor is the extensively used for various kinds of industrial drives. Ppt induction motor powerpoint presentation free to download.
Double field revolving theory ac current flows through the stator two fields are generated 1f forward rotating field 2bbackward rotating field pulsating field due to various magnitudes of field at diff time 2 3. Ppt equivalent circuit of an induction motor rotor. 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. We also discuss the construction of a three phase motor including its. Displaying powerpoint presentation on three phase induction motor department of electrical available to view or download. Ac induction motors are also the most common motors used in main powered home appliances. Threephase induction motor ppt download slideplayer. In the case of three phase ac alternating current operation, the most widely used motor is a 3 phase induction motor, as this type of motor does not require an additional starting device.
Search, download, upload, request and share educational ppts for free. They run at a constant speed from noload to the full load. Lecture series on basic electrical technology by prof. Ppt induction motors powerpoint presentation free to. These types of motors are known as selfstarting induction motors. Record all nameplate information for the induction motor. Chapter 3 phase induction motor drives, ppt, electrical. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. A 3phase, y connected, 460 volt line to line, 25 horsepower, 60 hz, 8 pole induction motor has the following constants, in ohms per phase referred to the stator. The speed of the ac induction motor is adjusted by the frequency variation of the ac power to the motor. The number of phases is m and each phase is made up of concentrated coils placed on 2q stator poles. A variable frequency drive vfd is used to control the speed of motor with the primary voltage control method. Displaying powerpoint presentation on three phase induction motor available to view or download.
It is widely used when compared to the three phase motor for the. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. Inverter not only adjusts the speed but also adjusts the voltage to the motor. As previously, we have covered a lot of important topics. The power and torque developed by the motor will be three times that of one phase. Threephase induction motors are the most common and frequently encountered machines in industry it can be. View and download powerpoint presentations on three phase induction motor ppt. Download three phase induction motor department of electrical pp for free. The stator carries a 3phase winding called stator winding while the rotor carries a shortcircuited winding. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. Threephase induction motors authorstream presentation.
In this chapter, we shall focus our attention on the construction. Find powerpoint presentations and slides using the power of, find free presentations research about three phase induction motor ppt. Generally, an ebook can be downloaded in five minutes or less. Introductionan induction motorim is a type ofasynchronous acmotor where power is supplied to therotating device bymeans ofelectromagneticinduction threephase induction motors 4. View 3 phase induction motor ppts online, safely and virus free. Equivalent circuit of an induction motor rotor consider just a single phase. Download 3 phase induction motor powerpoint presentation. You can download free ppt threephase induction motor electrical engineering ee notes edurev pdf from edurev by using search above. Most favored configuration amongst many more options are 64 three phase and 86 four phase srms as shown in the figure 1a.
The single phase induction motor resembles, threephase, 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. Induction motor electric motor squirrel free 30day. The main purpose of controlling the speed of three phase induction motor is to save unwanted energy. As its name indicates stator is a stationary part of induction motor.
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