AC MotorsAC MOTOR THEORYFor purpose of explanation, rotation of the magnetic field is developed in Figure 2 by "stopping"the field at six selected positions, or instances. These instances are marked off at 60° intervalson the sine waves representing the current flowing in the three phases, A, B, and C. For thefollowing discussion, when the current flow in a phase is positive, the magnetic field will developa north pole at the poles labeled A, B, and C. When the current flow in a phase is negative, themagnetic field will develop a north pole at the poles labeled A’, B’, and C’.Figure 2 Rotating Magnetic FieldRev. 0 Page 3 ES-12
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business