How to calculate output of a motor used as a generator

Click For Summary

Discussion Overview

The discussion revolves around calculating the output of a motor when it is used as a generator, specifically focusing on the relationship between the motor's specifications and its performance in generating electricity. The inquiry includes considerations of various motors' capabilities without the need for physical testing.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant asks how to calculate a motor's output when used as a generator based on the manufacturer's specifications.
  • Another participant questions whether the initial post was made in the appropriate forum category.
  • A participant proposes that if a motor consumes 1.5 volts at 100 RPM, it could be assumed that it would produce 1.5 volts when manually spun at the same RPM, contingent on it being a permanent magnet motor.
  • A later reply confirms the assumption about the motor's output under the specified conditions, while also affirming the appropriateness of the forum for the question.

Areas of Agreement / Disagreement

There is some agreement on the assumption regarding the motor's output when manually spun, contingent on it being a permanent magnet motor. However, the overall discussion remains open-ended with no consensus on the broader question of calculating output across different motors.

Contextual Notes

The discussion does not address specific assumptions about efficiency, load conditions, or variations in motor types that may affect output calculations.

phatlosz
Messages
4
Reaction score
0
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!
 
Last edited by a moderator:
Engineering news on Phys.org
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:
 

Similar threads

How can the output power of a motor be controlled using an inverter?
  • · Replies 6 ·
Replies
6
Views
2K
Sizing an Isolation Transformer for a DC Power Supply
  • · Replies 8 ·
Replies
8
Views
3K
BLDC motor as generator to power eddy current brakes
  • · Replies 7 ·
Replies
7
Views
3K
Predicting DC generator response
  • · Replies 3 ·
Replies
3
Views
2K
How to calculate the counter-electromotive force of a motor?
  • · Replies 4 ·
Replies
4
Views
6K
Designing a ripple low PS for DDS function generator
  • · Replies 6 ·
Replies
6
Views
2K
What Should You Know About Using DC Motors in Wind Energy Projects?
  • · Replies 3 ·
Replies
3
Views
2K
Simple regenerative generator/motor system
  • · Replies 12 ·
Replies
12
Views
3K
Is a PM Generators output greater than an A/C motors input?
  • · Replies 1 ·
Replies
1
Views
2K
Is a Larger DC Motor Needed for Low Wind Speed Power Generation?
  • · Replies 34 ·
2
Replies
34
Views
5K