Electrical Machines Syllabus
Periods/week : 3 Periods & 1 Tut /week. Ses. : 30 Exam : 70
Examination (Practical): 3hrs. Credits: 4
Electric Energy System
Basic Structure, Generation, Transmission, Distribution and Utilization of Electric Power, Non – Conventional Energy Sources (Elementary treatment only).
Constructional Features, Function of Commutator, Induced EMF and Torque Expressions, Relationship Between Terminal Voltage and Induced EMF for Generator and Motoring Action, Different Types of Excitation and Performance Characteristics of Different Types of DC Machines, Starting and Speed Control of DC Motors, Losses and Efficiency, Efficiency by Direct Loading, Swinburne’s Test and Hopkin’s Test, Applications of DC Machines.
Constructional Details, EMF Equation, Equivalent Circuit, Voltage Regulation, Losses and Efficiency, Auto – Transformers, Instrument Transformers, Open/Short – Circuit Tests and Determination of Efficiency and Regulation.
Three – Phase Induction Machines
Construction, Rotating Magnetic Field and 3ph Induction Motor, Power Flow Diagram, Torque and Torque-slip Characteristics, Condition for Max. Torque and its Value, Starting and Speed Control, Losses and Efficiency, Equivalent Circuit and Circle Diagram of Induction Motor, No – Load and Rotor – Blocked Tests and Efficiency and Torque – Speed Characteristics.
Three – Phase Synchronous Machines
Generation of EMF, Constructional Details, Induced EMF, Synchronous Generator on No – Load and Load, Synchronous Impedance and Voltage Regulation.
V – Curves and Inverted V – Curves, Synchronous Condenser, Starting of Synchronous Motors, Applications of Synchronous Machines.
Single – Phase Motors
Double Revolving Field Theory, Methods of Starting Single Phase Induction Motors, Universal Motor, Stepper Motor.
Text Books :
Electrical Machines, S. K. Bhattacharya, TMH Publications N. Delhi.
A First Course In Electrical Engineering, S. M. Tiwari, A. S. Binsaroor, Wheeler Publications.