Electrical Machines
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Electrical Machines Syllabus — Unit-wise Content
The official GTU curriculum for Electrical Machines (subject code 2131005) as prescribed for Electronics · Semester 3 divides the course into 4 units, covering 83 listed topics. The unit-wise breakdown below is read from the GTU syllabus document for this subject code, so you can check what the course actually covers before deciding which papers to attempt.
Download the official syllabus PDF (2131005)Unit 1 Transformers
- Single Phase Transformer: Working principle
- EMF equation
- Transformer on no load and on load
- vector diagram
- exact and approximate equivalent circuit
- O.C & S.C.test on transformer
- regulation of transformer
- losses &efficiency
- condition for maximum efficiency
- Allday efficiency
- Efficiency curve
- Sumpner’s test
- Auto transformer
- Saving of conductor material
- Parallel operation
- Parallel with equal and unequal voltage ratio. 3 Phase transformers: Construction
- Scott connection
- Instrument transformers
- Current transformers and potential transformers
Unit 3 Phase induction motor
- rotating magnetic field
- principle of operation
- frequency of rotor current
- rotor emf, rotor current
- expression for torque
- conditions for maximum torque
- torque slip characteristics
- starting torque in squirrel cage and slip ring motors
- effect of change in supply voltage on torque
- slip and speed
- relation between full load torque and maximum torque
- Power stages in induction motor
- vector diagram and equivalent circuit
- circle diagram
- construction and calculation
- speed control of 3 phase motor
- starting methods for 3 phase induction motor
- Single phase motor: 10 22 Double revolving field theory
- starting methods
- no load and block rotor test
- equivalent circuit
- types of single phase motor 3
- Synchronous Machine: Alternator
- Basic principle
- pitch factor
- distribution factor
- emf equation
- alternator on load
- voltage regulation
- synchronous impedance method
- mmf method
- ZPF method
- parallel operation
- synchronization of alternator
- Synchronous motor: Basic principle
- methods of starting
Unit 4 DC Machines
- DC Generator: Construction features
- emf equation of dc generator
- methods of excitation
- losses condition for maximum efficiency
- armature reaction
- interpoles and compensating winding
- methods of improving commutation
- characteristics of separately excited and self excited dc generator
- DC Motor: Working principle
- voltage equation
- condition for maximum power
- operating characteristics of dc motor
- torque developed
- 3 point and 4 point starter
- speed control methods
- swinburn’s and break test of dc shunt motor
Unit 5 Basic of Power transmission and distribution
- Operation of different power plants using block diagram-different terminologies like load factor
- diversity factor
- plant utilization factors etc
- Classification of transmission lines
- transmission line parameters
- ABCD constants
- Voltage regulation
- Ferranti effect
- efficiency of transmission line. 3-phase 3-wire and 3-phase 4-wire distribution system
- main lines
- comparison of various distribution systems
- load power factor improvement techniques
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