Cage Type Induction Motors and Circle Diagram

This course covers the comprehensive study of cage type induction motors, their construction, operation, and performance. It begins with an introduction to different types of three-phase induction motors, focusing on the cage type induction motor. The course explains the unique construction of the rotor in a cage type induction motor and its operation, including how it starts moving and produces the same number of poles as the stator. The course further explores the advantages and disadvantages of the cage type induction motor. It also discusses the impact of frequency on the synchronous speed of the rotating field and how power electronics converters have changed this. The course delves into the equivalent circuit of a three-phase induction motor and how it applies to a cage induction motor. It also explains the concept of air gap power and how to calculate the torque developed by the machine. The course concludes with a discussion on how to use the circle diagram to calculate the performance of the induction motor at a given value of slip.