How to calculate output of a motor used as a generator

AI Thread Summary
To calculate a motor's output when used as a generator, one can generally assume that a permanent magnet motor will produce a voltage equivalent to the voltage it consumes when spun at the same RPM. For a small DC motor operating at 1.5 volts and 100 RPM, it is reasonable to expect it to generate approximately 1.5 volts when manually spun at that speed. The discussion confirms that this type of inquiry is appropriate for the forum. Understanding the specifications and load conditions of the motor is crucial for accurate calculations. Overall, users are encouraged to explore motor capabilities without needing to purchase each one.
phatlosz
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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.
http://www.allelectronics.com/make-a-store/item/DCM-299/1.5-3.6-VDC-MOTOR/1.html"

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

Thanks!
 
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Did I post this in the right forum, or should I have posted it in another category?
 
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?

Thanks.
 
phatlosz said:
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?

Thanks.

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.
 
Thanks for getting back to me... :smile:
 
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