Question

What are the factors on which the speed of the motor depends. Discuss them for series and shunt.

Factors affecting speed of motor

Or

Speed of motor can be varied by varying

Φ-N α 1/ Φ

Ra – more

Applied voltage

Shunt motor

Φ constant Eb α N

Eb remains constant practically from no load to full load. Just a drop of 5-15%

Series motor

As N α 1/ Φ

As Ia increases Φ increases

N decreases

Notes