Electrical Machine- I
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Electrical Machine- I Syllabus — Unit-wise Content
The official GTU curriculum for Electrical Machine- I (subject code 3140913) as prescribed for Electrical Engineering · Semester 4 divides the course into 3 units, covering 28 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 (3140913)Unit 1 Magnetic fields and magnetic circuits
- Review of magnetic circuits - MMF, flux
- Visualization of magnetic fields produced by a bar magnet and a current carrying coil - through air and through a combination of iron and air
- Review of Ampere’s law and Biot Savart law
Unit 2 Principles of Electromechanical Energy Conversion
- B-H curve of magnetic materials
- flux-linkage vs current characteristic of magnetic circuits
- linear and nonlinear magnetic circuits
- energy stored in the magnetic circuit
- force as a partial derivative of stored energy with respect to position of a moving element
- torque as a partial derivative of stored energy with respect to angular position of a rotating element
Unit 3 DC Machines
- Review of construction and working of a DC machine
- visualization of magnetic field produced by the field winding excitation with armature winding open
- air gap flux density distribution
- flux per pole
- induced EMF in an armature coil
- Armature winding and commutation – Elementary armature coil and commutator
- lap and wave windings
- construction of commutator
- Derivation of back EMF equation
- armature MMF wave
- derivation of torque equation
- armature reaction
- air gap flux density distribution with armature reaction
- Armature circuit equation for motoring and generation
- Types of field excitations – separately excited
- shunt and series
- Open circuit characteristic of separately excited DC generator
- voltage build-up in a shunt generator
- critical field resistance and critical speed. 15 Subject Code: 3140913 w.e.f
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