Working Principle of DC Motor

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Working Principle of DC Motor
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Introduction to DC Motors

• The DC motor is the motor which converts the
  direct current into the mechanical work. Works on
  the principle of Lorentz Law, which states that
  the current carrying conductor placed in a
  magnetic and electric field experience a force.
  And that force is the Lorentz force.

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Construction of DC Motor

• There are two main parts of the DC motor.
• Armature or the rotating part.
• Stator or the stationary part.
• The armature coil consists of commutators and
  brushes.

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• The commutator converts AC into DC. Brushes
  transfer current from rotating part to stationary
  part. The armature is placed between the north
  and south poles of the electromagnet.

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Working Principle of DC Motor

• The basic working principle of the DC motor is
  that whenever a current carrying conductor places
  in the magnetic field, it experiences a
  mechanical force. Flemings left-hand rule and
  its magnitude decide the direction of this force.
  When armature winding is connected to a DC
  supply, an electric current sets up in the
  winding. Permanent magnets or field winding
  (electromagnetism) provides the magnetic field.
• The current carrying armature conductors
  experience a force due to the magnetic field.
  The Commutator is made segmented to achieve
  unidirectional torque. Otherwise, the direction
  of force would have reversed every time when the
  direction of movement of the conductor is
  reversed in the magnetic field. This is how a DC
  motor works!
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