generators

B

Bruce Durdle

Dunno about the hertz power product (whatever that is) but it will certainly affect the integrity of the rotating parts!
 
B

Bob Johnston

As the generator rotor goes through the end wall of the building there probably would be a large impact on the "hertz power product" Are you kidding???
 
N

Namatimangan08

I think it can never reach that speed. At most maximum speed it can achieve is the runaway speed. I have never heard runaway speed that is greater that 1.5 times of the rated speed.

Even if you assume it will eventually can reach its terminal speed more than says 5000rpm, all the guide bearings will be melting very soon. It follows by the shaft. It won't take long....
 
If this is just a theoretical question, and if the original poster was asking about how the speed change would affect the frequency of a synchronous generator, the relationship is defined by the formula:

F = (P * N)/120

where, F = Frequency (in Hz0
P = Number of poles of the generator rotor
N = Speed of generator rotor (in RPM)

Presuming the original poster's generator running at 3600 RPM was a two-pole generator running at 60.0 Hz (completely possible), the resultant frequency would be:

F = (2 * 16000)/120 = 32000/120 = 266.666667 Hz.

Since a lot of power from the prime mover would be consumed in increasing the RPM that would presumably leave less available for producing power.

But as the other respondents have all said, the generator would likely come apart due to centrifugal forces long before it reached 16000 RPM.

And, electrically, the exciter probably couldn't realistically control the generator terminal voltage to maintain the generator Volts/Hz rating, either, in reality.
 
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