IAM - 22523 Industrial AC Machines Practical
Course Outcomes:
The theory, practical experiences and relevant soft skills associated with this course are to be taught and implemented, so that the student demonstrates the following industry oriented COs associated with the above mentioned competency
Use the relevant three phase induction motor (IM) for different application
Use the relevant single phase induction motors in different applications
Use the relevant three phase alternator for different load conditions
Use suitable synchronous motors in different applications
Use suitable Fractional HP motors for different applications.Instruments Required
The major equipment with broad specification mentioned here will usher in uniformity in conduct of experiments, as well as aid to procure equipment by authorities concerned
Equipment Name with Broad Specificatio
Induction motors 3 hp/ 5hp, 415 V, 50 Hz, 1440 RPM squirrel cage ty
Induction motors 3 hp/ 5hp, 415 V, 50 Hz, 1440 RPM slip ring type
Ammeters MI Type: AC/DC 0-5-10Am
Voltmeter MI Type: AC/DC, 0-150/300V, 0-250/500
Wattmeter: Three phase double element 5/10Amp, 250/500
Wattmeter: Single phase, single element 2 5/5Amp, 200/ 400V
Low power factor wattmeter : Single phase, 2 5/5Amp, 250/500
Auto transformer: 3-phase, 5kVA, 0 to 500V
Load bank: Resistive, 3-phase, 5kW, 415
Load bank: inductive, 3-phase, 2 to 5kVAR, 415
Load bank: capacitive, 3-phase, 2 to 5kVAR, 415
Star- delta, auto transformers starter
Clip on meter ( amp, volts) digital/analo
Digital multimeter4 A digit with standard make for measurement
Tachometers: contact and non-contact types: 100 to 10000 RP
Brake load or other suitable means to load motors with suitable measurement facilities of powers (mechanical
3 phase alternator: 5kVA, 415 V, 50 Hz, 4 pole, 1500 RP
3 phase synchronous motor: 3hp, 415 V, 50 Hz, 1500 RP
Unit
Three Phase Induction Moto
Total Teaching Hours –
Distribution of Theory Mar
R Level –
U Level –
A Level –
Total Marks –
Unit Outcomes (UOs) (in cognitive doma
Explain with sketch working of the given three phase induction moto
Explain with sketch construction of the given type of three phase induction motor
Derive the expressions for rotor induced emf and torque of three phase induction motor for different operating conditions
Explain with sketch the operation of the motor in the specified quadrant
Determine the specified performance parameters of the motor
Explain with sketch the operation of the relevant starter for the given motor
Explain the specified method of speed control
Suggest the relevant IM for the specified different given applications
Topics and Sub-topi
Working principle: production of rotating magnetic field, Synchronous speed, rotor speed and sli
Constructional details of 3 phase induction motors: Squirrel cage induction motor and Slip ring induction motor
Rotor quantities: frequency, induced emf, power factor at starting and running condition
Characteristics of torque versus slip (speed), Torques: starting, full load and maximum with relations among them
Induction motor as a generalized transformer with phasor diagram
Four quadrant operation, Power flow diagra
Starters: need and types; stator resistance, auto transformer, star delta, rotor resistance and soft starters
Speed control methods: stator voltage, pole changing, rotor resistance and VVVF
Motor selection for different applications as per the load torquespeed requirements
Maintenance of three phase induction motors...m....p.cs.......r.in)20100802ks18r1MM)MsgsVVV.V,VVp.pens.:...s.:ations.
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