Complete Guide to Electrical Machine – I

Syllabus Content

1. Magnetic Fields and Magnetic Circuits (6 Hours)

  • Fundamentals: MMF, flux, reluctance, and inductance
  • Field visualization with bar magnets and coils through air or combined mediums
  • Core laws: Ampere’s Law and Biot-Savart Law

2. Principles of Electromechanical Energy Conversion (6 Hours)

  • Characteristics of magnetic circuits: B-H curves, linear vs. nonlinear circuits
  • Energy and force relationships in magnetic fields
  • Torque derivation for rotating elements

3. DC Machines (15 Hours)

  • Construction, components, and working principles
  • Topics covered include:
    • Armature winding, commutators, and EMF generation
    • Torque equation derivation
    • Armature reaction and speed-torque characteristics
  • Types of DC machines: Shunt, Series, and Separately excited machines
  • Testing and performance analysis: Swinburn’s, Hopkinson’s, and Field tests

4. Transformers (15 Hours)

  • Single-phase and three-phase transformers: Construction, working, and equivalent circuits
  • Voltage regulation, losses, and efficiency analysis
  • Advanced topics:
    • Parallel operation and tap-changing
    • Scott connections for phase conversion
    • Harmonic behavior and magnetizing currents
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