Working of Three Phase Induction Motor — Lesson 2

This lesson covers the intricate workings of a three-phase induction motor. It delves into the application of line to line voltage, the induced voltage, and the concept of flux per pole. The lesson further explains the role of the secondary switch and the impact of the secondary current. It also discusses the concept of the stator and the rotor, and how they interact to maintain a constant flux per pole. The lesson concludes with an exploration of the equivalent circuit of an induction motor and the concept of an 'imagined' motor for analytical purposes.

Video Highlights

01:09 - Role of secondary switch and secondary current
06:34 - Explanation of equivalent circuit of an induction motor
07:13 - Introduction to the concept of an 'imagined' motor
19:47 - Discussion on mechanical power in a 3 phase circuit

Key Takeaways

- A three-phase induction motor operates based on the application of line to line voltage and the induced voltage.
- The flux per pole remains constant, regardless of whether the secondary switch is open or closed.
- The stator and rotor work together to maintain a constant flux per pole.
- The equivalent circuit of an induction motor can be used to understand its operation better.
- The concept of an 'imagined' motor can be used for analytical purposes, helping to understand the operation of the actual motor.