Electrical Machines – I
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Follow on Instagram for UpdatesElectrical Machines – I Syllabus — Unit-wise Content
The official GTU curriculum for Electrical Machines – I (subject code DI03000081) as prescribed for EC · Semester 3 divides the course into 4 units, covering 56 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 (DI03000081)Unit 1 DC Generators Contents
- Machine: construction
- parts-function and material (2) D.C
- Generator: Principle of operation
- Faraday's law of electromagnetic induction
- Fleming's right-hand rule
- F. equation of D.C
- Generator (Derivation)
- (4) Types of D.C
- Generator and it's applications
- (5) Characteristics –Magnetic
- internal and external
- (6) Armature Reaction and Commutation (Briefly)
- (7) DC Machine: Power Stages
- voltage regulation and efficiency
Unit 2 D.C. Motors
- Contents (1) Principle of operation
- Lorentz force
- Fleming's Left-hand rule
- Back emf and it's significance
- (2) Torque: armature torque
- shaft torque
- Break Horse Power (BHP)
- (3) Types of D.C
- Motor characteristics: speed- armature current
- torque-armature current
- (4) Speed control: D.C. shunt and series motor - flux and armature control
- necessity of starters
- two-point starters
- three-point Program Name: Engineering Level: Diploma Branch: Electrical Engineering / Renewable Energy Subject Code: DI03000081 Subject Name: Electrical Machines – I w.e.f. 2024-25 http://syllabus.gtu.ac.in/ P a g e | 3 starters (6) Testing of D.C
- (Brake test
- Swinburne’s test)
- Motors applications
- advantages and disadvantages
Unit 3 Single phase transformers Contents
- Types of transformers: Shell type and Core type
- parts-functions and materials used for different parts
- (2) Principle of operation
- EMF equation
- voltage transformation ratio
- turns ratio
- (3) Significance of transformer ratings
- (4) No-load and On-load test on transformer and it's phasor diagram
- Leakage reactance
- (5) Equivalent circuit of transformer with equivalent resistances and reactances
- (6) Voltage regulation and Efficiency: Direct load Test
- Polarity Test
- All day efficiency
- (7) Single phase auto transformer: Construction and working
Unit 4 Three phase transformers Contents
- Working principle of three phase transformer
- bank of three single phase transformers
- Single unit of three phase transformer
- Cooling Methods
- (3) As per IS: 10028 (Part I)-1985 - Selection criteria of distribution transformer and power transformer
- (4) As per IS: 2026 (part IV)-1977 - Winding Connections / Vector group of three phase transformers (Star-Star
- Open Delta or V -V connection)
- Three phase to two phase conversion (Scott Connection)
- (5) Need of parallel operation
- conditions for parallel operation
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