3 phase induction motor nptel pdf free download

These are excited by a balanced three phase voltage supply. The magnetic field in the air gap from the voltage applied to the stator. 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. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed.

A 2200v,50 hz, three phase,6 pole,yb connected squirrel cage induction motor has following parameters. Singlephasing the stator of induction motor due on 20190904, 23. Singlephasing the rotor of induction motor applying balanced 3 phase ac voltage to the rotor applying balanced 3 phase ac voltage to the stator no, the answer is incorrect. Presentation on 3 phase motor electromagnetic induction. This motor benefits from the experience of one of the largest manufacturers in the world, using stateoftheart technology in automation, specially selected materials and rigorous quality control. Pdf speed control of 3phase induction motor using volt. No name of experiment page no 1 to perform the brake test on a 3 slip ring induction motor and obtain its performance characteristics 2 to start a 3 phase slip ring induction motor by rotor resistance starter. Pdf modelling of the threephase induction motor using simulink. Why there is no starting torque in a singlephase induction motor with one main. Starting of 3 phase induction motors, high starting. Consider a single phase induction motor whose rotor is at rest. A three phase induction motor is a selfstarting motor. Weg motors ensure excellent heat transfer properties from the.

There is uniform air gap between stator and rotor but no electrical connection. Single phase induction motor double revolving field theory the three phase induction motor starting torque inversely depends on the slip this implies that a small positive slip 0. A single phase induction motor is inherently not selfstaring can be shown easily. Polyphase induction motors construction details of cage and. Introduction an induction motor im is a type of asynchronous ac motor where power is supplied to the rotating device by means of electromagnetic induction three. Iit should be checked that the motor selected has a sufficient overload capacity. Its dc resistance line to line between two phases of the stator is 1. The performance calculation by means of finding torque, slip and efficiency. Installation and maintenance three phase induction motors 3 4850 en 2019. You should also make a dc measurement of stator winding linetoline resistance. Ppt threephase induction motor electrical engineering.

Pdf a study of improving the power factor of a threephase. 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. How an induction motor works by equations and physics. Introduction to brushless permanent magnet motors, stepper motor, switched reluctance. Free download induction motor seminar ppt, pdf report.

Run the induction motor on noload at rated supply voltage. Umanand, principal research scientist, power electronics group, cedt, iisc bangalore for more details on nptel visit. Pdf basic electrical engineering 1st year ebook, notes. Primary focus will be on the operation of 3 phase induction machine, single phase induction motor,and synchronous machines. They run at a constant speed from noload to the full load. Syllabus rotating magnetic field in threephase induction motor construction and principle of operation of im equivalent circuit and power flow diagram of im. Rl loads and rl load with free wheeling diode, three phase fully controlled rectifiers with r, rl. Contents 1introduction 2 history 3 principle of operation 4 starting of motor 5 speed control 6 types of 3 phase induction motors 7 construction 8 production of rotating magnetic field.

Ppt threephase induction motor electrical engineering ee. The three phase induction motors are simple in construction, rugged, low cost and easy to maintain. Most of these configurations introduce asymmetry problems in the machine. Three phase halfwave diode rectifier with r load fig 15. These motors are practically started with full line voltage applied across the stator terminals. A fair knowledge of distributed windings is essential in order to understand the working of rotating machines more effectively few lectures will be devoted on this topic. The 3 phase set of currents, each of equal magnitude and with a phase. Threephase induction motor, cage and wound slipring rotor, synchronous and rotor speed, slip, induced voltages in stator winding and rotor. In this video basic of construction and working principle of 3 phase induction motor is explained with the help of 3d animation. There are two types of rotors which are employed in 3 phase induction motor. When a three phase supply is given to the three phase wound stator of an induction motor, a rotating field is developed. Two rotating field theory, toquespeed characteristics, performance analysis, single phase two winding motors, split phase motor, shaded pole motor, reluctance motor and hysteresis motor. Simplified three phase full bridge dc ac inverter circuit download scientific diagram voltage controller under induction motor load of a acdc converter solved.

A three phase induction motor is a type of ac induction motors which operates on three phase supply as compared to the single phase induction motor where single phase supply is needed to operate it. Advanced electric drives, video lectures 19, nptel, iit. 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. Three phase induction motor introduction basic electrical. 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 three phase induction motor is the easiest motor of this type to understand so these notes start with that type. Observe the supply line voltage v0, noload line current i0 and noload power p0. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. Principle of operation and comparison to synchronous motors a 3 phase power supply provides a rotating magnetic field in an im.

This would result in a balanced three phase current. Pdf svpwm based speed control of induction motor drive with. The induction motor especially three phase induction motors are widely used ac motor to produce mechanical power in industrial applications. The rotor is same as that employed in 3phase squirrel cage induction motor. Three phase induction motor, cage and wound slipring rotor, synchronous and rotor speed, slip, induced voltages in stator winding and rotor. In a three phase induction machine, there are three sets of windings phase a winding, phase b and phase c windings. The rotor is same as that employed in 3 phase squirrel cage induction motor.

Currently, the most common induction motor, is the cage rotor motor. Blocked rotor test block the rotor firmly and apply a reduced voltage to obtain rated current at the motor terminals. This document is highly rated by electrical engineering ee students and has been viewed 3243 times. Induction motors objective the aim of this chapter is to gather knowledge about the following topics of induction motors. 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. Three phase induction motor is the most popular type ac motor. Pdf svpwm based speed control of induction motor drive. Ball and roller bearings are used to suit heavy duty, trouble free running and for. Principle of operation the operation of a 3 phase induction motor is based upon the application of faradays law,lens law and lorentz force on a conductor when kept in a magnetic field whose direction can be found by flemings left hand thumb rule. Swing equation consider a three phase synchronous charger. Induction motor seminar ppt, pdf report study mafia. An induction motor is tested in the blockedrotor test.

The electric drives with manual control can be as simple as a room fan. 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. The basic idea of an electric motor is to generate two magnetic fields. Calculate ithe time taken and energy dissipated in the motor during starting. Equations 1 3 represent the currents that ow in the three phase windings. In today post, we will discuss the different types of three phase induction motors with working and applications. Electrical engineering basic electrical technology nptel. A complete description of three phase induction motor and details of each part. The rotor will constantly be turning to align its magnetic field with that of the stator field.

Three phase induction motor introduction basic electrical engineeringmcq on single phase induction motor3 phase induction motor objective type question3 ph. Run capacitor stator winding relay rotary switch rotor start capacitor main or run windin stator winding main winding start capacitor rotor. This manual covers squirrel cage rotor motor where the rotor. Syllabus rotating magnetic field in three phase induction motor construction and principle of operation of im equivalent circuit and power flow diagram of im. Torque of a three phase induction motor is proportional to flux per stator pole, rotor current and the power factor of the rotorthe torque developed at the. The basic difference between an im and a synchronous ac motor is that in the latter a current is supplied onto the rotor. Mar 26, 2021 ppt three phase induction motor electrical engineering ee notes edurev is made by best teachers of electrical engineering ee. Record all nameplate information for the induction motor.

Chapter name mp4 download 1 introduction to electric machines idownload2single phase. The static switch capacitor has also been used for single phase induction motors 3 45 with inconclusive results. The stator works as the primary while the rotor works as the secondary. Due to the absence of brushes, there are no sparks in the motor. A basic tutorial on computer simulation of phase controlled. One single phase wattmeter plus miscellaneous apparatus as needed. Almost 80% of the motor is a threephase induction motor among all motors used in industries. Feb 09, 2014 it protects the inner part of the machine. The bars forming the the bars forming the conductors along the rotor axis are connected by a thick metal ring at the ends, resulting in a short circuit.

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. Polyphase induction motorsconstruction details of cage and. The single phase induction motor is more subtle and less efficient. Psim model of three phase halfwave diode rectifier with r load fig 16. 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 three phase supply current produces an electromagnetic field in the stator winding which leads to generate the torque in the rotor winding of. Swing equation consider a threephase synchronous charger.