Rotating Magnetic Fields in Stator and Rotor — Lesson 3

This lesson covers the concept of rotating magnetic fields in machines, focusing on the stator and rotor. It explains how a balanced three-phase winding on both the stator and rotor can induce a voltage on the stator coils and rotor coils. The lesson further discusses the impact of locking the rotor and the resultant rotating field. It also explores the concept of phase shifting and the role of rotor speed in inducing voltage. The lesson concludes by explaining the impact of closing the switch on the rotor and the resultant torque. An example used in this lesson is a machine with a stator and rotor, each with a balanced three-phase winding.

Video Highlights

00:21 - Discussion on the impact of a balanced three-phase winding on the stator and rotor
02:28 - Understanding the concept of phase shifting
12:32 - Explanation of the resultant torque

Key Takeaways

- A balanced three-phase winding on both the stator and rotor can induce a voltage on the stator coils and rotor coils.
- Locking the rotor results in a rotating field.
- The concept of phase shifting is used to manipulate the voltage.
- The speed of the rotor plays a crucial role in inducing voltage.