The Armature Of Dc Motor Is Laminated

Motor laminations are created by using electrical steel laminations.

The armature of dc motor is laminated.

In electrical engineering an armature is the component of an electric machine which carries alternating current. Because of this manufacturers strive to make armature core laminations as thin as practical from a manufacturing and cost standpoint with modern dc motors typically using laminations that are 0 1 to 0 5 mm thick. The armature of dc machine is made up of laminated sheets to. By reversing the connections of either the armature or the field winding connection with the supply.

The universal motor is modified in several ways to allow for proper ac supply operation. Adding silicon to steel increases its electrical resistance improves the ability of magnetic fields to penetrate it and reduces the steel s hysteresis loss. Reduce hysterisis loss. For this reason the rotor is made of armature core that s made with several low hysteresis silicon steel lamination to reduce the magnetic losses like hysteresis and.

The armature winding of dc motor is attached to the rotor or the rotating part of the machine and as a result is subjected to altering magnetic field in the path of its rotation which directly results in magnetic losses. Therefore smaller the current hence lesser eddy current loss. Shunt generators each with armature resistance of 0 02 ohm and field resistance of 50 ohm run in parallel and supply a total current of 1000 amperes to the load circuit. Are 270 v and 265 v their bus bar voltage will be.

Question is the armature of a dc machine is laminated options are a to reduce the hysteresis loss b to reduce eddy current loss c to reduce the mass d to reduce the inductance e leave your comments or download question paper. That is why armature of dc machines either motor or generator is laminated. The armature windings conduct ac even on dc machines due to the commutator action which periodically reverses current direction or due to electronic commutation as in brushless dc motors the armature can be on either the rotor rotating part or the stator stationary part. Silicon steel also known as electrical steel is steel with silicon added to it.

A universal motor s armature typically has far more coils and plates than a dc motor and hence fewer windings per coil.