Working of a dc machine as a generator and as a motor
Basic principle of dc machines
Need of brush and commutator
Types of windings
Types of dc machines and their characteristics
Starting of a dc motor
Losses and efficiency
DC machines work either as a dc generator or as a dc motor. In a dc generator, a set of conductors or coils placed on a rotating body, called armature, are rotated continuously inside a magnetic field with the help of a prime mover (prime mover is another machine, may be a diesel engine or a turbine, which rotates the armature). The magnetic field is created by passing dc current through the windings ...