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.