Rotor Field, Stator Field and Resultant Field in Synchronous Machines — Lesson 2

This lesson covers the performance analysis of a synchronous machine, focusing on how to calculate the parameters if their values are known. It explains the equivalent circuit of a synchronous machine, which is simple and only consists of a series circuit with no magnetizing branch. The lesson also discusses the importance of the torque angle in a synchronous machine, which is the angle between the rotor field and the resultant field. It further explains how to calculate the power delivered by a synchronous machine operating at a lagging power factor. The lesson concludes with the concept of complex power delivered by the source.

Video Highlights

00:39 - Explanation of the equivalent circuit of a synchronous machine
09:03 - Discussion on the importance of the torque angle in a synchronous machine
13:10 - Calculation of the power delivered by a synchronous machine operating at a lagging power factor
25:32 - Explanation of the concept of complex power delivered by the source

Key Takeaways

- The equivalent circuit of a synchronous machine is simple and only consists of a series circuit with no magnetizing branch.
- The torque angle in a synchronous machine, which is the angle between the rotor field and the resultant field, plays a crucial role in determining the power the generator is delivering and the torque developed by the machine.
- The power delivered by a synchronous machine operating at a lagging power factor can be calculated using the concept of complex power delivered by the source.
- The complex power delivered by the source is equal to the product of the voltage and the complex conjugate of the current.