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The maximum power developed in a cylindrical synchronous machine depends on the

  • The maximum power developed in a cylindrical synchronous machine depends on both the synchronous reactance and excitation.
  • The synchronous reactance (Xs) is an inherent property of the synchronous machine that depends on the machine's physical dimensions and the magnetic properties of its materials.
  • The synchronous reactance determines the magnitude of the internal voltage generated in the machine and the magnitude of the armature current that flows through the machine when it is loaded.
  • The excitation (field current) controls the strength of the magnetic field in the rotor, which in turn controls the magnitude of the internal voltage generated in the machine.
  • The excitation can be adjusted to control the machine's output voltage and reactive power output, and it also affects the machine's ability to deliver active power to the load.
  • The load angle also affects the power output of the machine, but it does not directly determine the maximum power that can be developed.
  • The load angle is the angle difference between the stator voltage and the rotor voltage phasors, and it determines the active power output of the machine for a given excitation and synchronous reactance.
  • However, the maximum power that can be developed depends on the excitation and synchronous reactance.