Why DC excitation is used for alternators? Why cant it be AC?
Answer Posted / manoj kumar sahoo
DC which does not change its direction & magnitude .So dc
excitation work properly in alternator without change the
pole.And AC change its direction in 50 c/s. Therefore AC
excitation is not suitable for the alternators.
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?
why incomer bay is required before transformer bay if there are more than 1 nos. of transformer bay.
how we select ac fuse rating of an power inverter???
How isolater function when installed inelectrical 440V wiring
what is the meaning of 0.5ohm Resistance
what is sevice settings for mccb?How can be it setted?
How to check the cable fault / hv test of transformer cable.
What is cut-off rate?
Two electric lamps 40 W, 220 V each are connected in series across 220 V. What is the power consumed by the connection?
what is the meaning of impedance protected in instrument cooling fan
why is the power generator connected as star earthed or star earthed through reactance and what its features ?
control & auxilary circuits used for circuir breakers
The power supplied to a 50mH inductor from a 120V, 60Hz source will be
The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is
What is the effect of pi controller on the system performance?