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D.C. Machines : Principles and Construction
Construction of a DC machine
E.M.F. Equation
Working principle as a Generator or as a Motor
Types of Armature winding
Lap winding and Wave winding (concept of simplex, duplex & multiplex winding)
Magnetization curve of DC machines
Torque
Losses & efficiency of DC machines
D.C. Machines : Generators
Equivalent circuits of DC generators
Armature reaction
Commutation
Remedies to reduce armature reaction and commutation troubles
Interpoles and Compoles
Characteristics of series, shunt & compound generators (nature & interpretation of graph)
D.C Machines : Motors
Equivalent circuits of DC motors
Principle of operation
Development of torque & back EMF
Torque equation (Numerical)
Characteristics of Shunt and Series motors
Method of speed control of DC motors
D.C Machines : Operation and Testing
Characteristics of DC generators
Characteristics of DC motors
Speed Torque Characteristics
Reversal rotation of DC motor
Starting of DC motors
Application of DC motors
Losses in DC motors
Condition in DC machines
Parallel operation of DC shunt generators
Hopkinson test on shunt machines
Principle of Cross Field Machines
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