Let take an alternator it is a numerical expression where the fixed number of poles the machine has to be rotated at a particular speed to keep the frequency of the generated emf in constant value. So a 100 amp alternator will require about 4 HP at full output. The formula looks like this.
An alternator typically takes about 1 HP horse power for every 25 amps of power generated.
Such a rotating speed is called Synchronous speed of the alternator Synchronous speed is being notated by Ns Ns 120fP. EMF Equation of a Transformer. How much HP does it take to turn an alternator. Such a rotating speed is called Synchronous speed of the alternator Synchronous speed is being notated by Ns Ns 120fP.
