Question

relationship between speed and flux of a dc motor

Answer 1

We know, back emf Eb of a DC motor is the induced emf in the armature conductors due to the rotation of armature in magnetic field. ... This shows the speed of a dc motor is directly proportional to the back emf and inversely proportional to the fluxper pole.

Answer 2

Answer:

It is already explained above that the speed of a dc motor is inversely proportional to the flux per pole. Thus by decreasing the flux, speed can be increased and vice versa. ... Adding more resistance in series with the field winding will increase the speed as it decreases the flux.