Electrical Engineering XYZ MCQ
Maximum power developed in a cylindrical synchronous machine depends on:
- Synchronous reactance
- Both 1 and 2
- Load angle
Correct answer: 3. Both 1 and 2
Explanation: The maximum power developed in a cylindrical synchronous machine depends on both the synchronous reactance (X_s) and excitation.
- Synchronous Reactance (X_s): Synchronous reactance is a parameter that represents the opposition offered by the synchronous machine to the flow of alternating current. It is an essential factor in determining the machine’s impedance. The value of synchronous reactance affects the capability of the machine to handle reactive power, and it influences the power angle and, consequently, the machine’s ability to transfer real power.
- Excitation: The excitation of a synchronous machine refers to the magnetic field strength produced by the direct current supplied to the machine’s field winding. The excitation level directly affects the strength of the magnetic field, influencing the machine’s ability to generate power. Proper excitation is crucial for achieving maximum power output and efficiency in a synchronous machine.