Downloaded 20 times
Uploaded byMd. Ashraful Islam
Name of presentation Three phase induction motor
This presentation summarizes the three-phase induction motor. It discusses the basic principles of operation, where a rotating magnetic field is set up in the stator by a three-phase power supply which induces an emf in the rotor conductors. It then describes the key components of the motor, including the stator, rotor, windings, and frame. Finally, it compares squirrel cage and slip ring induction motors, noting that squirrel cage motors are simpler, cheaper, and more commonly used in industrial applications, while slip ring motors have higher starting torque but are more complex and expensive.
More Related Content
Similar to Name of presentation Three phase induction motor
Name of presentation Three phase induction motor
- 1. NAME OF PRESENTATION:THREE PHASE INDUCTION MOTOR Prepared by Name : Md Ashraful Islam ID. 1401EEE50015 Name of subject: Electrical machines 2 Name of Teacher : MR. TANVIR HOSSAIN 1
- 2. Course outline: 1.Introduction 2.Type ofelectricalmachine 3.Typeof 3-pninductionmotor 4.BasicPrinciple 5.WorkingPrinciple 6.Component'sofinductionmotor 7.Application 8.Comparisonbetween1-phI.M.&3-phI.M. 2
- 3. Introduction » ElectricalMachinesareElectromechanicalenergy conversiondevices. » Electricalmotorcovertselectricalenergyinto mechanicalenergyandelectricalgeneratorsarevice versa. »MostoftheIndustrialloadareinductive,especially 3-phinductionmotorsarewidelyusedinindustrial applicationsfor continuousoperation. 3
- 4. Types of electricalmachines » DCMachines:- ⧖DCMotor ⧖DCGenerator » DCMotor: ⧖DCShuntMotor ⧖DCSeriesMotor ⧖DCCompoundWoundMotor » DCGenerator ⧖DCShuntGenerator ⧖DCSeriesGenerator ⧖DCCompoundWoundGenerator 4
- 5. Principle of operation »ARotating Magneticfield(RMF)issetup inthe stator whena3-Phasesupply isgiven. » Thestationary rotor cuttherevolving fieldand duetoelectromagnetic inductionane.m.f.isinduced intherotorconductor. » Astherotorconductorisshortcircuitedcurrent flowsthroughthem. » It becomesacurrentcarrying conductorin magnetic fieldandstart rotating. 5
- 6. Slip of inductionmotor »Inductionmotorrotoralwaysrotateat aspeedless thansynchronousspeed. » Thedifferencebetweentheflux (Ns) andthe rotorspeed(N)iscalledslip. » %Slip(s) = Ns–N Ns *100 Where,Ns=SynchronousSpeed N=ActualSpeedofrotor » Slipspeed=Ns–N 6
- 7. Image of 3-pninduction motor 3-pn induction motor 7
- 8. Terminals of 3-pninduction motor 8
- 9. Cut view of3-pn induction motor 9
- 10. Component of 3-phinduction motor » Frame » Stator » StatorWinding » Rotor » RotorWinding » CoolingFan » Bearings Frame:Frameprovidesmechanicalsupporttothe statorandrotor.Itismadefromcastingmaterials. Stator:Itisstationarypartofinductionmotor.It consistsstatorwindingIt ishousedonthemotor frame. 10
- 11. Windings » StatorWindings: ⧖Starconnected ⧖Deltaconnected » RotorWindings: ⧖Itiswoundasrotorbarsandshortcircuitedat boththeendsthroughendrings. 11
- 12. Crosse section ofstator & rotor 12
- 13. Type of 3-phinduction motor AccordingtorotorconstructionitcanbeClassifiedin twocategory accordingtorotorConstruction:- Squirrel cage induction motor • Slip ring induction motor • 13
- 14. Comparison of Squirrelcage Induction Motor & Slip ring Induction Motor SlipringInductionMotor:- » Ithashigh startingtorquecomparetosquirrelcage IM » Constructioniscomplicated Maintenancecostishighcomparetosquirrelcage IM » Starterrequirescompulsory »Cannotuseatexplosivearea *Application:- » Crane,hoist,liftandwherehigh startingtorqueis required 14
- 15. Comparisonof SquirrelcageInductionMotor&Slip ringInductionMotor SquirrelcageInductionMotor:- »Mostoftheapplicationofindustrialaswellasdomesticare thistypeofinductionmotor. »Itsconstructionissimpleandrugged. »CheapcoparetoslipringIM »Maintainanceiseasy » CostislesscomparetoslipringIM »Canuseatexplosivearea » StartingtorqueislowcomparetoslipringIM Application:- » Loathmachine,Compressors,centrifugalpump,in agricultureetc.wherecostismostimportantfactor 15
- 16.