# Aktu Syllabus Electrical Machines-II (KEE-503) Btech

Learn about the advanced concepts of rotating electrical machines, such as synchronous and induction motors, their control, and their applications in diverse sectors, in the AKTU B.Tech Electrical Machines-II syllabus.

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## UNIT-1: SYNCHRONOUS MACHINE-I

• Constructional features,
• Armature winding,
• EMF Equation,
• Winding coefficients,
• Equivalent circuit and phasor diagram,
• Armature reaction, O. C. & S. C. tests,
• Voltage regulation using Synchronous Impedance method,
• MMF method, Potier’s Triangle method,
• Voltage and frequency control (Governer system) of alternators,
• Parallel operation of synchronous generators,
• Operation on infinite bus,
• Synchronizing power and torque co-efficient.

## UNIT-2: SYNCHRONOUS MACHINE-II

• Two reaction theory,
• Transient and sub-transient reactance,
• Power flow equations of cylindrical and salient pole machines,
• Operating characteristics.
• Synchronous Motor – Starting methods,
• Effect of varying field current at different loads,
• V-curves,
• Hunting & damping,
• Synchronous condenser.

## UNIT-3: THREE PHASE INDUCTION MACHINE-I

• Constructional features,
• Rotating magnetic field,
• Principle of operation,
• Phasor diagram,
• Equivalent circuit,
• Torque and power equations,
• Torque-slip characteristics,
• No load & blocked rotor tests,
• Efficiency.

## UNIT-4: THREE PHASE INDUCTION MACHINE-II

• Starting,
• Deep bar and double cage rotors,
• Cogging & Crawling,
• Speed control (with and without emf injection in rotor circuit).

## UNIT-5: SINGLE PHASE INDUCTION MOTOR

• Double revolving field theory,
• Equivalent circuit,
• No load and blocked rotor tests,
• Starting methods,
• Repulsion motor,
• Universal motor.