Torque due to Stator and Rotor Fields — Lesson 5

This lesson covers the concept of stator and rotor fields in an electrical machine. It explains how these fields are sinusoidally distributed and how they interact to create torque on the rotor. The lesson also discusses the concept of a resultant field, which is the vector sum of the stator and rotor fields. This resultant field, also known as B net, is used to calculate the induced voltage in the stator and rotor. The lesson further explains the concept of torque angle, which is the angle between the rotor field and the net field. The lesson concludes with a discussion on the polarity of the induced voltage in the stator and rotor.

Video Highlights

00:56 - Explanation of how stator and rotor fields create torque
05:27 - Discussion on the concept of a resultant field
11:42 - Explanation of the torque angle
20:12 - Calculation of induced voltage using the resultant field
26:55 - Discussion on the polarity of the induced voltage

Key Takeaways

- The stator and rotor fields in an electrical machine are sinusoidally distributed. The interaction between these fields creates torque on the rotor.
- The resultant field, or B net, is the vector sum of the stator and rotor fields.
- The torque angle is the angle between the rotor field and the net field.
- The induced voltage in the stator and rotor can be calculated using the resultant field.
- The polarity of the induced voltage in the stator and rotor is determined by the direction of the resultant field.