Download 3 phase induction motor powerpoint presentation today we are going to made available a powerpoint presentation file for all. This motor housing is made of cast aluminum or cast iron. Ppt induction motor powerpoint presentation free to. Ppt presentation on speed control of induction motor nilesh. The topic lies under the basic electrical and electronics engineering course that covers various other. The most common type of ac motor being used throughout the work today is the induction motor. Dec 28, 2018 displaying powerpoint presentation on three phase induction motor available to view or download. Both the ends are connected with bearings for free rotation means of reduced friction. Download 3 phase induction motor powerpoint presentation. Like all electrical machines, the induction motor consists of a stator and rotor. Ppt induction motor powerpoint presentation free to download id.
The singlephase induction motor is not selfstarting. Understand the principle and the nature of single phase and 3 phase induction machines. These motors are selfstarting and use no capacitor, start winding, centrifugal switch or other starting device. 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. Dc motors depend either on mechanical or electronic commutation to create rotating magnetic fields. For this example, refer to the motor equivalent circuit and calculations described above. The current in each winding is 120 electrical degrees out of phase with the urrent in the other windings. In turn, a current is produced in the rotor bars and shorting ring and another magnetic field is. Speed control of three phase induction motor ppt play ppt.
The ac induction motor is the most used electrical motor in industrial applications worldwide. A website for electrical engineering education on machines,circuits,power systems,measurements,control systems,power electronics with projects online. 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. View 3 phase induction motor ppts online, safely and virus free. One singlephase wattmeter plus miscellaneous apparatus as needed. The rotor is separated from the stator by a small airgap which ranges from 0. The topic lies under the basic electrical and electronics engineering course that.
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. View and download powerpoint presentations on three phase induction motor ppt. Historythe induction motor with a wrapped rotor wasinvented by nikola tesla in 1888 in the unitedstates. Presentation on 3 phase motor electromagnetic induction machines. Jun 04, 2017 inverter ppt pdf powerpoint presentation.
Nov 22, 2015 a three phase induction motor runs on a three phase ac supply. Introduction threephase induction motors are the most common and frequently encountered machines in industry simple design, rugged. In electrical equipment the anchors winding would be induced by the magnetic field, although the rotor takes this part in threephase induction motors. As previously, we have covered a lot of important topics. Squirrel cage induction motor requires significantly less maintenance as it does not contain brushes, commutators, slip rings. The threephase induction motor is the extensively used for various kinds of industrial drives. Three phase induction motor electromagnetic induction. 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. An electrical motor is an electromechanical device which converts electrical energy into mechanical energy.
This document is highly rated by electrical engineering ee students and has been viewed 2470 times. Induction motor basics, single phase and three phase. The singlephase ac induction motor best fits this description. Three phase induction motor powerpoint ppt presentation. You should also make a dc measurement of stator winding linetoline resistance. It is logical that the least expensive, lowest maintenance type motor should be used most often. These types of motors are known as selfstarting induction motors.
The cylindrical middle piece that holds the stator iron core, the two bellshaped end covers holding the ball bearings. These stator and rotors are made up of highmagnetic core materials with less hysteresis and eddy current losses. In this chapter, we shall focus our attention on the construction. Induction motor has the same physical stator as a synchronous machine with an alternate rotor development. Perform an analysis on induction machines which is the most rugged and the most. As the torque at zero rotor speed is nonzero, the induction motor is selfstarting. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. A three phase induction motor runs on a three phase ac supply. Record all nameplate information for the induction motor. Presentation on 3 phase motor free download as powerpoint presentation. Other motors that are included are 1phase induction motors, permanent synchronous motors and synchronous reluctance motors.
The operating principle of a 3 phase induction motor is based on the production of r. Three phase induction motor free download as powerpoint presentation. Find powerpoint presentations and slides using the power of, find free presentations research about three phase induction motor ppt. At the instant of starting, a 3phase induction motor is like a transformer whose secondary side is short circuited slip s1. Working principal of three phase induction motor electrical. Three phase voltage supplied to the stator windings produces a rotating magnetic field. They run at a constant speed from noload to the full load. Some of the electrical energy supplied to the stator is read more. Three phase induction motors used in explosive atmospheres w60 line squirrel cage rotor horizontal date. Be careful it can hurt to tangle with a three phase motor. Ppt threephase induction motor electrical engineering.
The three phase induction motor is the extensively used for various kinds of industrial drives. Introductionan induction motorim is a type ofasynchronous acmotor where power is supplied to therotating device bymeans ofelectromagneticinduction threephase induction motors 4. Three phase induction motor consists of a stator and a rotor, and there is no electrical connection between these two. Difference is that transformer is an alternating flux machine while induction motor is rotating flux machine. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. Download 3 phase induction motor ppt download 3 phase induction motor powerpoint presentation. These motors are squirrel and slipring type induction motors. The basic idea of an electric motor is to generate two magnetic fields.
A portion of rotating magnetic field in a threephase induction motor. Threephase induction motor presentation transcript. Ppt three phase induction motor powerpoint presentation, free. A 3 phase induction motor can be used for different applications with various speed and load requirements. The major difference between them is that transformer is static in nature i. 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. The speed of the ac induction motor is adjusted by the frequency variation of the ac power to the motor. Typical induction motor rotors the magnetic field generated in the stator induces an emf in the rotor bars. Similarly in this post, we will made a powerpoint file accessible.
Three phase induction motors used in explosive atmospheres w60 line squirrel cage rotor. Quadraturefield theory and inductionmotor action quadraturefield theory and inductionmotor action singlephase induction motor cannot develop a rotating magnetic field needs an auxiliary method powerpoint ppt presentation free to view. Maintenance and troubleshooting three phase induction motor. This article concentrates only on threephase induction motor and its protection. At the instant of starting, a 3 phase induction motor is like a transformer whose secondary side is short circuited slip s1. A threephase induction motor consists of two parts stator the stationary part and rotor the rotatory part with the latter being separated from the former by a small air gap.
Watch this video to understand the working principals of the three phase induction motors. Three phase ac circuits mcqs with explanatory answers. Threephase or polyphase motors are of mainly two types. 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 simple explanation of how a 3 phase induction motor works. Threephase and sixphase induction motor electromagnetic. Inverter not only adjusts the speed but also adjusts the voltage to the motor.
Search, download, upload, request and share educational ppts for free. The working of the three phase induction motor is based on the principle of electromagnetic induction. Induction motor might be worked as either motors or generator. You can download free ppt threephase induction motor electrical engineering ee notes edurev pdf from edurev by using search above. Today we are going to made available a powerpoint presentation file for all. Slots are pressed out on the internal periphery of the stator laminations. The 3 phase set of currents, each of equal magnitude and with a phase. The legs at the middle section permit the attachment of. Inductor convertor the dc voltage as constant current source csi regulated. When the primary winding or stator is connected to a three phase alternating current supply, it. The main purpose of controlling the speed of three phase induction motor is to save unwanted energy. Since here we are talking about maintenance of induction motor, and it is of two types. Historythe induction motor with a wrapped rotor wasinvented by nikola tesla in.
Scribd is the worlds largest social reading and publishing site. Three phase induction motors authorstream presentation. Induction motor 1 chapter 3 induction motor bee23 electrical machine power system 2 learning outcomes. An inverter is nothing but a motor control which is used in adjusting the speed of an ac induction motor. Threephase and sixphase induction motor electromagnetic models are developed in twodimensions in the finite element method based softwaretool computer solutions comsol multiphysics. Download 3 phase induction motor ppt archives jugaruinfo. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain.
Three phase ac induction motors are widely used in industrial and commercial applications. A successful salesman for general electrics motor division once remarked to one of your instructors that, when asked by a customer how a motor. The stator of an induction motor consists of a number of overlapping windings offset by an electrical angle of 120. Nov 04, 2017 download 3 phase induction motor powerpoint presentation today we are going to made available a powerpoint presentation file for all. A 3 phase induction motor has two main parts i stator and ii rotor. The rotor and stator are separated by an air gap which allows free rotation of the rotor. 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. Threephase induction motor ppt download slideplayer. In this video basic of construction and working principle of 3 phase induction motor is explained with the help of 3d animation. The adobe flash plugin is needed to view this content. A variable frequency drive vfd is used to control the speed of motor with the primary voltage control method. At the end of the lecture, student should be able to. 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. Search wegthreephaseinductionmotorsmasterline50019089.
Nov 04, 2012 introductionan induction motor im is a type ofasynchronous acmotor where power is supplied to therotating device bymeans ofelectromagneticinduction three phase induction motors 4. Threephase induction motors authorstream presentation. Introduction types of electrical machines types of 3 ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. It certainly leads to the best performance and high efficiency of the induction motor. 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. Threephase induction motor protection systems and its. The rotor will constantly be turning to align its magnetic field with that of the stator field.
Free download induction motor seminar ppt, pdf report. These are of two types, squirrel cage and slip ring motors. 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. Generally, an ebook can be downloaded in five minutes or less. P number of poles for more details about rotating magnetic field, read production of rotating magnetic field this rotating field passes through the air gap and cuts the rotor conductors, which are stationary. 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. Ac induction motors are also the most common motors used in main powered home appliances. We also discuss the construction of a three phase motor including its. Unit 16 electric motors washington state university.
This strange behavior of singlephase induction motor can be explained on the basis of doublefield revolving theory. When the motor is connected to a singlephase power supply, the main winding carries an alternating current. 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. Threephase induction motors are the most common and. In the induction motor, as in all motors, electrical energy is converted into mechanical energy. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. Ppt threephase induction motor electrical engineering ee. Applications of threephase induction motors of size varying from half a kilowatt to thousands of kilowatts are numerous. Jan 15, 2014 watch this video to understand the working principals of the three phase induction motors. Apr 12, 2020 ppt three phase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. So the main idea behind motor maintenance is to prevent breakdown rather than repairs them.
Compare the rotation of this motor with that in figure 164. The 3phase set of currents, each of equal magnitude and with a phase. The magnitude of rotor induced emf, current and the torque developed, depends upon the relative motion. Induction motors the motor housing consists of three parts. What are the advantages of a three phase induction motor. In 1889, dolivodobrovolsky invented the induction motor with the wound. The stator of a 3 phase induction motor is built up of sheet steel laminations insulated from each other. Threephase induction motors are the most common and frequently. Rotating flux is only possible when 3 phase voltage or poly phase which is 120 degree apart in time is applied to a three phase winding or poly phase winding 120 degree apart in space then a three phase rotating magnetic flux is.
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