Rotating Magnetic Fields and Motors

This course covers the comprehensive understanding of rotating magnetic fields and their application in motors. It starts with the historical background of the rotating magnetic field, its generation, and the concept of balanced polyphase winding. The course then moves to the fundamentals of three-phase induction motors, explaining the role of the stator and rotor, synchronous speed, and the impact of changing the supply sequence. The course further delves into the concept of rotating magnetic fields in the stator and rotor, the impact of locking the rotor, and the role of rotor speed in inducing voltage. The course also covers the concept of torque in electrical machines, the interaction between the stator field and rotor field, and the impact of rotor current on the creation of a rotating field. The course concludes with the understanding of the stator and rotor fields in an electrical machine, the resultant field, and the concept of torque angle. An illustrative example used throughout the course is a machine with a stator and rotor, each with a balanced three-phase winding.