Electrical Engineering XYZ
No load saturation characteristics are plotted between`:
- No load voltage and field current
- Short circuit current and armature current
- No load voltage and armature current
- Short circuit current and field current
Correct answer: 1. No load voltage and field current
Explanation: The no-load saturation characteristics of a synchronous machine are typically plotted on a graph with the no-load voltage on the vertical axis and the field current on the horizontal axis. This graph helps in understanding how the machine behaves under varying field current conditions when there is no mechanical load on the machine.
The no-load voltage represents the voltage across the terminals of the machine when it is running without any mechanical load connected to its shaft. The field current is the current flowing through the field winding of the machine, which is responsible for producing the magnetic field necessary for power generation.
By plotting the no-load saturation characteristics, engineers can analyze how changes in the field current affect the no-load voltage, helping in optimizing the machine’s performance and efficiency.