... thestator winding is the armature, or electrical power input element. (Indc and Universal motors, this is reversed, with the armature containedon the rotor.)In most electrical machines, the rotor ... 1997, “Rotating Electrical Machines,Part 9, “Noise Limits.”n IEC 34–12, 1980, “Rotating Electrical Machines, Part 12: StartingPerformance of Single-speed, Three-phase Cage Induction Motors forVoltages ... zero in athree-phase motor, since the mmf’s of the three phases are 120° apartfor both backward and forward components of all of them. Finally,therefore, a three-phase motor has the following...