The Armature Of Dc Motor Is Laminated

With laminated armature eddy current losses are reduced to very less.

The armature of dc motor is laminated.

Motor armatures have to be made of thin laminations of iron to work efficiently a plain solid iron armature would waste a lot of energy in at least two ways the magnetic field that is produced by. 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. Silicon steel also known as electrical steel is steel with silicon added to it. Are 270 v and 265 v their bus bar voltage will be.

Note thinner the laminations greater is the resistance offered to induced e m f. That is why armature of dc machines either motor or generator is laminated. Similarly armature core is laminated to reduce eddy current losses. 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.

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. Reduce hysterisis loss. Motor laminations are created by using electrical steel laminations. 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.

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. By reversing the connections of either the armature or the field winding connection with the supply. The armature of dc machine is made up of laminated sheets to. So lamination of the core is done only when your power electronic converter feed the field excitation to the dc machine.

Therefore smaller the current hence lesser eddy current loss.