Electrical Machines

• What is an electrical machine?
  Definition and types of 'electrical machine'.
• Fleming's left hand rule and right hand rule
  To determine the direction of motion in motors or direction of current in generators.

• Faraday's law and Lenz's law
  Laws of electromagnetic induction.
• Maxwell's right hand grip rule
  Direction of magnetic field around a straight current carrying conductor.

DC Machines

• Classification of DC machines
  Different types of DC generators and DC motors.
• DC Generators
  Construction and working of a DC generator.
• Armature winding
  Lap winding, wave winding and other related terms.
• Armature reaction
  Armature reaction in DC machines and it's adverse effects.
• EMF and Torque equation
  EMF equation of a DC generator and torque equation of a DC motor.
• Characteristics of DC generators
  Internal (E/Ia), external (V/I_L) and open circuit characteristics.
• Losses in a DC machine
  Copper losses, iron losses (core losses), mechanical losses, power flow diagram.
• Working of a DC motor
  How does a DC motor work?
• Characteristics of DC motors
  Torque vs. armature current, speed vs. armature current and speed vs. torque characteristics.
• Starting methods of a DC motor
  3 point starter, 4 point starter and series motor starter.
• Speed control of a DC motor
  Various methods for controlling speed of a DC motor.
• Electric braking of DC motors
  Different methods of electric braking of dc motors.
• Parallel operation of shunt generators
  Operating 2 dc shunt generators in parallel.
• PMDC motor
  Permanent magnet DC motors.
• BLDC motor
  Construction and working of brushless dc motors.

AC Machines

• Induction motor
  Working principle and types of induction motor.
• Three phase induction motor
  Construction, working and types.
• Rotating magnetic field
  Production of rotating magnetic field (rmf).
• Torque equation of 3 phase IM
  Starting torque and running torque, condition of maximum torque.
• Starting of 3 phase IM
  Using primary resistors, auto transformers and star-delta starters.
• Speed control of induction motor
  Various speed control methods of induction motors.
• Types of squirrel cage motor
  Class A, B, C, D, E and F.
• Double squirrel cage motor
  Construction and working of double squirrel cage motor.
• Crawling and cogging
  Crawling and cogging in squirrel cage induction motor.
• Single phase motor
  Working principle of single phase induction motor. Why single phase IM is not self-starting?
• AC synchronous generator (alternator)
  Construction and working of alternator.
• Synchronization of an alternator
  Connecting an alternator into grid.
• Induction generator
  How does an induction generator work?
• Synchronous generator vs. induction generator
  Difference between synchronous generator and induction generator.
• Synchronous motor
  Construction and working of a synchronous motor.
• Synchronous motor vs. induction motor
  Difference between synchronous motor and induction motor.
• Salient pole vs. non-salient pole rotor
  Comparison between salient pole rotor and non-salient pole rotor.

Transformers

• Transformer
  Construction, working and types of transformers.
• Ideal transformer
  Characteristics of an ideal transformer.
• EMF equation and voltage transformation ratio
  EMF equation of a transformer and voltage transformation ratio.
• Transformer with resistance and leakage reactance
  Magnetic leakage and practical transformer with resistance and leakage reactance.
• Transformer losses and efficiency
  Copper losses, core losses (iron losses).
• Equivalent circuit
  Finding equivalent circuit of a transformer.
• Open circuit and short circuit test on transformer
  Open circuit (OC) and short circuit (SC) test on a transformer.
• Sumpner's or back to back test
  Sumpner's test or back to back test on a transformer.
• Auto transformer
  How doen an auto transformer work?
• Three phase transformer
  Working and types of three phase transfomers.
• 3 phase transformer connections
  Star-star, star-delta and such different configurations.
• CT and PT
  Current transformer (CT) and Potential transformer (PT)
• Transformer cooling
  Different cooling methods of transformers.
• Parallel operation of transformers
  Necessity and conditions for parallel operation.
• Buchholz relay
  Working of buchholz relay and it's advantages.

Miscellaneous

• Brief introduction to circuits
  Series parallel circuits, voltage and current, Ohm's law, integrated circuits
• Basics of power electronics
  Diodes, GTO, transistors etc.
• Stepper motor
  How does a stepper motor work?
• Troubleshooter's guide to motor overload
  Some of the key areas that could be responsible for motor overloads and their remedies.
• Universal motor
  Construction and working of a universal motor.
• Servo motor
  How does a servo motor work?
• Safety tips for portable generators
  Safety tips while using portable generators.
• 6 different types of jobs for electrical engineers
  What are different job profiles for electrical engineers?
• Electric actuators
  Benifits of electrical actuators.
• Potentiometer vs. Rheostat
  Difference between a potentiometer and a rheostat.
• Terminal Blocks
  A terminal block (also called as connection terminal or terminal connector) is a modular block with an...