Construction of DC motor
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Principle of DC motor
Whenever a current-carrying conductor or coil is placed in a magnetic field it experiences a mechanical force.
The magnitude of force experienced is given by
Where
B= magnetic flux density Weber per meter square
I = current flowing through coil or conductor in amps
L= length of conductor
Motoring action installation of two flexes field and armature flexes related to
Significance of back EMF (Eb):-
- In every DC motor, there are units of generating action after the motoring action due to this generating action and EMF gets induced in the armature winding and conductor.
- This induced EMF opposes the supply voltage due to links la and is known as the back EMF Eb..
- magnitude of Eb is given by.
Where.
Φ Flex in Viber
P= Number of poles
N= Speed in our nature in RPM
Z=Armature conductors
A = number of parallel paths
Working of DC Motor
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