A dc motor has armature failure when voltage is applied but the armature is not rotating.
To find the answer, we need to know more about the working of motor.
What is an armature and how it works?
- The armature's job is to continuously produce a magnetic field, which, along with the magnetic field generated by the stator windings, causes the rotor (or armature) to rotate.
- Due to the relative motion between the flux provided by the field winding and the flux produced by the armature winding, an EMF is created when the armature is utilized as an electric motor.
- This EMF will oppose the torque generated in the rotor and the current flowing through an armature.
- As a result, mechanical power is created from electrical power.
- A shaft is used to transmit the toque generated in the rotor to rotate other objects.
- The most common fault with armatures is worn commutators, caused by the friction of carbon brushes against the commutator surface.
- Over time the insulation between the commutator segments becomes proud as the copper of the commutator surface wears away.
Thus, we can conclude that, a dc motor has armature failure when voltage is applied but the armature is not rotating.
Learn more about armatures here:
https://brainly.com/question/1382241
#SPJ1
