Working Principle of DC Motor

1. Working Principle of DC Motor

2. 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.

3. 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.

4. 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.

5. 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. Fleming’s 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! Read more…