# Generators

Discussion in 'General Electronics Discussion' started by Moha99, Mar 1, 2013.

1. ### Moha99

261
0
Nov 18, 2011
What is more important in a generator?

Torque or Rpm?

If Rpm increased = more power?
If torque increased= more power?

What exactly is more important in generating power?

2. ### john monks

693
3
Mar 9, 2012
Neither. Torque times Rpm equals power.

3. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,500
2,840
Jan 21, 2010
Another way of stating this is that while keeping either one constant, power will be increased in proportion with any increase in the other.

In general, for a generator, torque is required to counteract the opposing force generated by the load placed on it (i.e. caused by the opposing magnetic field generated by the flow of current).

In reality, neither are independent, the operating point of the generator is set by a balance of the power available and the load.

For practical generators, some sort of governor is required to maintain constant voltage and/or frequency, one method being by altering the instantaneous power delivered to the shaft of the generator.

4. ### Moha99

261
0
Nov 18, 2011
If we increased RPM wouldn't that increase the power output?
Lets say that torque "slightly" increased. Or even stayed the same...

Based on this formula:
P = T x RPM/5250

I believe so.

5. ### Harald KappModeratorModerator

11,801
2,749
Nov 17, 2011
That's exactly what John wrote. And no contradiction to Steve's argument.

261
0
Nov 18, 2011
Indeed.

7. ### Moha99

261
0
Nov 18, 2011
I just figured out the answer to my problem by simply looking at the formula.
Increase torque = higher power
Increase rpm = higher power.

8. ### BobK

7,682
1,688
Jan 5, 2010
Yes, or the first post in answer to question might as well.

Bob