January 22, 2012

Slip of Induction Machine : The Hidden Power

Ever wondered why slip is so important in induction machine?

(If you do not know, in case: slip is a measure of speed difference between stator and rotor magnetic field in induction machine.) When stator coil is energized in induction machine, it produces a magnetic field. If the energizing force i.e. voltage or current is rotating in nature, generated stator magnetic field is rotating in nature as well.

When this stator magnetic field starts rotating around rotor, it cuts the rotor coil (or the conductor bars embedded in rotor). Therefore, the rotor experiences a changing