Summary Details discusision of dc machine in short

What is DC Machine:


An electromechanical device which can convert direct current (dc) electricity into
mechanical energy or mechanical energy into direct current (dc) electricity is known as
a DC machine.


➢ If the DC machine converts DC electrical energy into mechanical energy, it is known
as DC motor.
➢ If the machine converts mechanical energy into DC electrical energy, then it is known as
a DC generator.


Both DC motor and DC generator have the similar construction.

,Construction:

A typical DC machine consists of the following major parts
• Yoke or Frame
• Armature
• Field System
• Commutator
• Brushes
• Bearings

,
, Yoke or Frame
• The yoke is the outer frame of the DC machine. It is made up of such
materials that have high permeability and high mechanical strength.
• Yoke of DC machine is made up of cast steel

Pole and Pole shoe
• The field winding is placed on a pole. When current passes through
the field winding, it will create an electric magnetic field and behaves
as an electromagnet.
• The pole shoes expand flux in the entire machine.