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Does amperage matter in induction motors?

  1. Feb 19, 2013 #1
    if i increase the amperage in an induction motor, will the induction motor spin faster? and vise versa?
     
  2. jcsd
  3. Feb 19, 2013 #2

    Simon Bridge

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    "Amperage"? You mean the current?
    Or are you talking about a manufacturers rating printed on the side?
     
  4. Feb 20, 2013 #3
    Sorry thebluser your question doesn't make sense. How do you propose to increase current? Undervoltage, overvoltage and load will all increase current but won't necessarily increase speed.

    Maybe the answer is increasing line frequency?
     
  5. Feb 20, 2013 #4

    Simon Bridge

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    Could just mean buying a motor with a bigger "amperage" rating.
    I think the question can be translated in terms of what determines the rotor speed - which would be, all else being equal, the frequency of the AC current yes?
     
  6. Feb 20, 2013 #5
    what i meant is, "ignoring the motor's rating, would adding current to the induction motor but not changing the frequency, change anything in it's RPM/torque or anything else which would affect it's speed?" buuuuuuuuuuuuuuuuuuuuuuuuuuuuuuut you already answered my question so kthxbye. by the way, i have a problem in making questions easy to understand so i apologize.
     
  7. Feb 20, 2013 #6
    In typical applications one does not simply change the current in a motor. You will need to change the voltage, frequency or mechanical load.
     
  8. Feb 21, 2013 #7

    Simon Bridge

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    It is quite normal that the first form of the question is not very clear ... that's expected.
    Quite a lot of science is just learning to ask useful questions - and a lot of the process is refining the earlier questions. Don't sweat it.
     
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