NAME:
OVIE BRIGHT ELO
MAT. NO. : M.20/ND/EEE/14535
HOW ROTATING FIELDS ARE PRODUCED
Rotating magnetic fields are produced radically around the rotor by the varying currents in the
stator winding.
When a three-phase winding is energized from a three-phase supply, a rotating magnetic field is
produced.
This field is such that it's poles do not remain in a fixed position on the stator but go on shifting
their positions around the stator. For this reason, it is called a rotating field.
Rotating magnetic fields .
HOW POLYPHASE MACHINES ARE CONSTRUCTED
A poly-phase machine consists of a poly-phase winding embedded in a laminated stator and a
conductive squirrel cage embedded in a laminated rotor. Three-phase currents flowing through
the stator creates a rotating magnetic field which induces a current and consequent magnetic
field in the rotor.
Poly-phase Machine construction.