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Generators

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

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  1. Moha99

    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

    john monks

    693
    1
    Mar 9, 2012
    Neither. Torque times Rpm equals power.
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,305
    2,738
    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

    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 Kapp

    Harald Kapp Moderator Moderator

    9,667
    2,019
    Nov 17, 2011
    That's exactly what John wrote. And no contradiction to Steve's argument.
     
  6. Moha99

    Moha99

    261
    0
    Nov 18, 2011
    Indeed.
     
  7. Moha99

    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.
    Basic math would lead you to the right answer.
     
  8. BobK

    BobK

    7,674
    1,684
    Jan 5, 2010
    Yes, or the first post in answer to question might as well.

    Bob
     
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