Open Circuit Test on Three Phase Alternator
A cylindrical-rotor alternator on load draws a current at a leading pf angle Θ and with an internal pf angle Ψ. Under this operating condition, electrical angle between fiend axis and armature-reaction axis is
Which of the following will change in a 3-phase synchronous motor, as a consequence of excitation variations? 1. Pull-out torque 2. Torque angle 3. Magnitude and power factor of stator current 4. Output power Select the correct answer using the codes given below :
A synchronous motor is operating on no load at unity power factor. If the field current is increased, the pf will become
The power-angle characteristics of a salient-pole synchronous machine contains a second harmonic terms, because
In a round-rotor alternator, reactive power is maximum at a load angle of