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How to calculate output of a motor used as a generator

  1. Nov 28, 2009 #1
    Does anyone know how to figure out how to calculate a motor's output when used as a generator based on the manufacturer's specs for its operation?

    ie. Small, but powerful DC motor. 0.40" x 0.32" x 0.66" long. Operates on 1.5 - 3.6 Vdc. 110mA @ 3Vdc, no load. 500mA with load.

    I'm trying to figure out what various motors are capable of without having to buy all of them.

    Last edited by a moderator: Apr 24, 2017
  2. jcsd
  3. Nov 28, 2009 #2
    Did I post this in the right forum, or should I have posted it in another category?
  4. Nov 28, 2009 #3
    Could I assume that if it the motor were spinning 100 RPM and consumed 1.5 Volts, that it would produce 1.5 Volts if I were spinning it at manually at 100 RPM?

  5. Nov 28, 2009 #4


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    Gold Member

    Yes. Assuming it is a permanent magnet motor, which yours appears to be.

    And yes, I believe this is the correct forum to post this type question.
  6. Nov 30, 2009 #5
    Thanks for getting back to me... :smile:
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