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.

- 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.

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