What is the function of armature core?
It produces a flux that is used for the development of power inside the machine such that the motor is able to rotate. The winding wound on the core is given current through a DC supply. This current-carrying winding as under the influence of the magnetic field develops a force that develops a rotational torque.
How do I know if my armature is bad?
Checking the amp draw of your starter is another simple method to test for a bad armature. The specifications may vary from vehicle to vehicle so you will need to check your car manual for the normal amp draw range. If the amp draw is overly high, that is a sign of a bad armature.
What is an armature core?
Armature Core. The central mass of iron on which the insulated wire, to be rotated in the field of an electric current generator or motor, is wound.
What is the purpose of armature core in DC machine?
Armature Core of DC Generator The purpose of armature core is to hold the armature winding and provide low reluctance path for the flux through the armature from N pole to S pole.
What causes armature failure?
Worn commutators are one of the most common causes of armature failure. When commutators become worn or damaged, they wear down carbon brushes much quicker which can result in a damaged or destroyed armature.
Which tool is used for testing armature of motor?
ANSWER:A Growler is an electric device used for testing insulation of a motor for shorted coils.
What is armature resistance of DC motor?
The resistance of the armature windings, measured with an ohmmeter when the motor is at rest, unpowered, is 2.45 ohms.
What is the definition of an armature component?
An armature is an electrical machine component that carries alternating current. With the number of components, namely the core, the winding, the commutator, & the shaft, an armature can be designed. With many thin metal plates named as laminations, the armature core can be designed.
What is the thickness of an armature core?
With many thin metal plates named as laminations, the armature core can be designed. The lamination thickness is approximately 0.5 mm and depends on the frequency the armature is designed to work with.
What is the function of an armature winding?
It consists of teeth and slots in which the winding is housed. It provides a low reluctance path for the main field flux. The armature winding is responsible for the production of armature flux.
How is an armature used in a control method?
Armature Control Method Basically, an armature is provided with resistance this helps in limiting the excess current. To control the speed of the motor, apart from the inbuilt winding resistance, a controlling resistance should also be added. The relation between the speed of the motor and the back emf of a motor is given by