3 phase induction motor nptel pdf file

Ac induction motors are also the most common motors used in main powered home appliances. Consider a single phase induction motor whose rotor is at rest. Graphics 3 grs 1 gui 6 heat transfer 2 hog 1 hrp 1 image processing 85 importing data 1 induction motor 1 interface 1 interpolation 5 interview questions 3 iot 2 ipcam 1 jpeg 1 kmeans clustering 1 kalman filter 8 knn 5 lidar 1 line detection 1 line styles 1 live 5 live editor 6 loocv 1 lookup. The construction of the stator and two types of rotor. Introduction types of electrical machines types of 3 ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. 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 by synchronous impedance method, parallel operation of synchronous generator synchronizing alternators with infinite bus bars, theory of operation. Nptel, online courses and certification, learn for free. You should also make a dc measurement of stator winding linetoline resistance. 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. Electrical machines 3 pdf notes em iii notes pdf smartzworld. 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. Like synchronous machine, the stator winding of an induction machine is.

In this application note, we will generate a third pwm in software, using a general purpose timer and an io pin resource that are readily available on the picmicro microcontroller. One single phase wattmeter plus miscellaneous apparatus as needed. It can be shown that a sinusoidal threephase balanced set of ac voltages. A single phase induction motor is inherently not selfstaring can be shown easily. Design and simulation of three phase induction motor at. Field oriented control of a 3phase ac induction motor. Induction motor totallyenclosed fancooled nema standard epact three phase induction motors sdesign versatility teco totally enclosed fan cooled squirrelcage induction motors are designed, manufactured and tested to meet or exceed the latest nema, ieee, csa and. 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. The torque developed at the shaft of a 3 phase motor is constant, less vibration in machinery powered by 3 phase motors. Simplified steadystateequivalent circuit of induction motor. An843, speed control of 3phase induction motor using pic18 mcus. Sep 11, 2017 an induction motor can therefore be made without electrical connections to the rotor. Nov 27, 2019 the three phase induction motor is the most widely used electrical motor.

Characteristics of induction motors nidec corporation. Singlephase induction motor the winding used normally in the stator fig. Learn for free, pay a small fee for exam and get a certificate. An induction motor s rotor can be either wound type or squirrelcage type. A sliding mode control smc with integral surface is employed to control the speed of three phase induction motor in this paper. Single phase motors have only two power source supply lines connected. Nov 27, 2019 an electrical motor is an electromechanical device which converts electrical energy into mechanical energy.

Single phase induction motor the winding used normally in the stator fig. Torqueslip speed characteristics of induction motor nptel. These currents act to produce mmf and ux along the axes of the respective coils. The rotor is of squirrel cage type, which is a cheap one, as the rating of this type of motor is low, unlike that for a threephase im. Moduleiv 10 hours single phase induction motor, theory of operation double revolving field theory, equivalent circuit, determination of parameters methods of starting, split phase starting, repulsion starting, shaded pole starting, performance characteristics. The rotor winding terminals are connected to three slip rings which turn with the rotor. And on the other hand, when designed to have a high impedance, the motor has an increased amount of torque in a lowspeed range. Pdf speed control of induction motor using pi and vf. May 28, 2018 how does an induction motor work how it works 3 phase motor ac motor duration. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. The construction of the circle diagram is based on the approximate equivalent circuit shown below. As the stator winding is fed from a singlephase supply, the flux. Ac motors singlephase 3phase minneapolis, mn rapid. The slip ringsbrushes allow external resistors to be connected in series with the winding.

Fall 2005 ee595s electric drive systems 3 voltsperhertz control. Speed control of induction motor using pwm technique. Speed control of three induction motor by vf method for batching motion system. It is the diagrammatic representation of the performance of the induction motor. The rotor is of squirrel cage type, which is a cheap one, as the rating of this type of motor is low, unlike that for a three phase im. Matlab simulation for speed control of three phase induction. If the induction motor is operating in the linear magnetic region, the lm is constant. A stator winding is placed in the stator of induction motor and the three phase supply is given to it. Construction of three phase induction motor electrical4u. The single phase motor can operate off either the a. Tecowestinghouse motor company po box 227 786800277. The stator has a threephase winding, and embedded in slots distributed sinusoidally. The balanced winding is of the same type, as given in lesson no. Record all nameplate information for the induction motor.

Chapter 3 induction motor and different speed control methods page no 3. 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. Equivalent circuit and power flow diagram of im nptel. Let us consider the space around b0 and ccoil sides. A three phase, 12 pole, salient pole alternator is coupled to a diesel engine running at 500 rpm. When a motor is designed in such a way that impedance of the aluminum conductor of the rotor is reduced, its efficiency is increased in a highspeed range.

Module 8 three phase induction motor version 2 ee iit, kharagpur lesson 30 construction and principle of operation of im version 2 ee iit, kharagpur in the previous, i. The single phase motor stator has a laminated iron core with two windings arranged perpendicularly. One singlephase wattmeter plus miscellaneous apparatus as needed. The stator works as the primary while the rotor works as the secondary. Nptel provides elearning through online web and video courses various streams. Field oriented control of a 3 phase ac induction motor ixys its diversified product base of specialized power semiconductors, integrated circuits and rf power is utilized by more than 2500 customers worldwide, ranging across industrial, transportation, telecommunications, computer, medical, consumer and clean tech markets. Stator is made up of number of stampings in which different slots are. The major difference between them is that transformer is static in nature i. This application note also covers the basics of induction motors and different types of induction motors. Rotating magnetic field in threephase induction motor nptel. A three phase induction motor runs on a three phase ac supply.

It supplies an induction motor ich has a full load speed of 144wh 0 rpm. A 3 phase induction motor can be used for different applications with various speed and load requirements. How is the torque produced in the rotor of the threephase induction motor. Frequency of supply to the induction motor f pn120 12. The three phase induction motor is the extensively used for various kinds of industrial drives. Introduction types of electrical machines types of 3ph induction motor basic principle working principle compnents of induction motor application comparision between 1ph i. 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 its name indicates stator is a stationary part of induction motor. Microcontroller based control of three phase induction motor using pwm technique. As the stator winding is fed from a single phase supply, the flux. Advantages of 3 phase induction motor generally easy to build and cheaper than corresponding dc or synchronous motors induction motor is robust. They run at a constant speed from noload to the full load.

The strategy used is a modified field oriented control to control. How does the rotor speed differ from synchronous speed. Find the synchronous speed of a 6pole 50 hz ac motor in revolution per minute. To understand the rotations of magnetic field consider a 2pole 3phase stator as. Despite the fact that the three phase motor has more phases than the single phase motor, the single phase motor is a much more complex machine. Different types of starters for induction motor nptel. Circle diagram of an induction motor the circle diagram of an induction motor is very useful to study its performance under all operating conditions.

Several additional components are necessary to operate the single phase motor. Then, equation 1 can be shown in terms of magnitude as. Circle diagram of an induction motor its construction. This strange behavior of single phase induction motor can be explained on the basis of doublefield revolving theory. If the rotor of an 8pole 50hz 3phase motor is rotating at the speed of 510 rpm in the same direction. The main winding of a single phase induction motor produces a. Electromagnetic energy conversion principles week 7. Because of the high efficiency and low cost, 3 phase ac induction motors are the most common type of motor found in industrial applications. Lecture 6 three phase induction motors cairo university. Find the percentage slip and number of poles of the induction motor. Starting methods for singlephase induction motor nptel.