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EX-402 · Electrical Machine-I/Official Syllabus

Electrical Machine-I (EX-402) - Official Syllabus

1
Unit 1

Transformer-I

  • Working principle
  • e.mf. equation
  • construction
  • phasor diagrams
  • equivalent circuit
  • voltage regulation
  • losses
  • separation of hysteresis and eddy current losses
  • efficiency
  • tests: open circuit and short circuit
  • load
  • Sumpner’s test
  • Condition for maximum efficiency and regulation
  • Power and distribution transformer
  • allday efficiency
  • Excitation phenomenon
  • Autotransformer: working
  • advantages
  • its equivalent circuit and phasor diagram
2
Unit 2

Transformer-II

  • Three phase transformer: its construction
  • groups and connections
  • their working and applications
  • Scottconnection
  • Parallel operation of Transformers: application
  • advantages
  • requirement and load sharing
  • Tap changers
  • cooling
  • conservator and breather
  • Pulse and high frequency transformers
3
Unit 3

Three phase Induction Motor- I

  • Working principle
  • construction
  • comparison of slip ring and squirrel cage motors
  • steady state analysis
  • phasor diagram and equivalent circuit
  • power flow diagram
  • torque-speed and power-speed characteristics
  • Losses and efficiency
  • No load and block rotor test
  • circle diagram
4
Unit 4

Three phase Induction Motor-II

  • Starting of squirrel cage and slip ring motors
  • power factor control
  • Cogging & Crawling
  • Double cage &Deep bar Indication Motor
  • impact of unbalanced supply and harmonics on performance
  • speed control
  • braking
  • Induction Generator
  • Applications
5
Unit 5

Single Phase Motors

  • Single Phase Induction motor
  • double revolving field theory
  • equivalent circuit and its determination
  • performance calculation
  • starting methods and types of single phase Induction motors: their working principle and applications
  • comparison with three phases Induction Motor
  • Single phase A.C. series motor
  • Servo motors
  • Linear Induction Motor

Laboratory Experiments

  • Perform turn ratio and polarity test on 1-phasetransformer
  • Perform load test on a 1-phase transformer and plot its loadcharacteristic
  • Perform OC and SC tests on a 1-phase transformer and determine its equivalent circuit. Also find its efficiency and regulation at different load and powerfactor.
  • Perform OC and SC tests on a 3-phase transformer and determine its equivalent circuit. Also find its efficiency and regulation at different load and powerfactor.
  • Perform Sumpner’s test on two 1-phase transformer and determine its efficiency at variousload.
  • Perform No-load and block rotor test on a 3- phase IM and determine its equivalentcircuit.
  • Perform load test on a 3- phase IM and plot its performancecharacteristics.
  • Study various types of starters used for 3- IMs.
  • Perform No-load and block rotor test on a 1- phase IM and determine its equivalentcircuit.

Reference Books

  • Electrical Machines & Power Systems — V.Del Toro — Prentice-Hall, Inc., EnglewoodCliffs — 1985
  • Electrical Machines — S K Bhattacharya — McGraw-Hill
  • Electrical Machines — Ashfaq Hussain — Dhanpat Rai & Co
  • A.C. Machines — Langsdorf — McGraw-Hill
  • Electrical Machines — Samarajit Ghosh — Pearson
  • Electrical Machines — Nagrath, Kothari — McGraw-Hill
  • Electrical Machines — P.S.Bimbhra — Khanna Publishers
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