How to measure and control the torque of a motor?

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Discussion Overview

The discussion revolves around measuring and controlling the torque of a 24V DC motor, particularly one without identifiable specifications. Participants explore methods for power measurement and torque adjustment while maintaining speed, as well as the characteristics of the motor and its intended application.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the voltage source for the motor and the ease of turning the rotor by hand, suggesting these factors may provide insight into the motor's characteristics.
  • Another participant requests a photograph of the motor for scale, expressing skepticism about the size of a 2HP motor fitting in one hand.
  • A participant mentions the need to reduce the motor's power from 2HP to 1/3HP and seeks advice on how to achieve this while controlling torque.
  • There is a reference to a previous thread discussing speed control of a DC motor, which may provide relevant information.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the feasibility of the motor's specifications or the methods for controlling its torque without affecting speed. There are differing views on the motor's size and power capabilities.

Contextual Notes

Participants have not provided detailed specifications or measurements of the motor, leading to uncertainty regarding its characteristics and the methods for control. The discussion lacks clarity on the specific nature of the load intended to be driven by the motor.

danielmg96
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Hi, I have a motor with no information, not even a label, just the connectors, I was wondering if there was a way to measure its power and if there was a way to control it without affecting it's velocity, I possesses simple elements, some sensors (inductive) and a manometer, my brain is now dry, thanks.
 
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Hi danielmg96. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

Do the connectors hint at what voltage source you may connect the motor to?

With the motor not connected to any voltage, can you easily turn the rotor using one hand?

Can you photograph the motor, along with a box of matches for scale, and post it here. You have given no hint at whether you have something like a slot car motor, or the motor out of a washing machine.

What do you mean by controlling the motor without affecting its speed? What characteristic would you like to control?
 
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Well, it is a 24VDC, fits in my hand, I'd like to change its torque, forgot to mention it is a 2hp motor and I really need to change it to 1/3 hp permanently
 
danielmg96 said:
Well, it is a 24VDC, fits in my hand, I'd like to change its torque, forgot to mention it is a 2hp motor and I really need to change it to 1/3 hp permanently
Okay. What source are you going to use for the 24V? What is the nature of the ⅓ hp load you want to drive?
 
There is a previous thread at the very foot of this page on speed control of a DC motor. Well worth a read.
 
UMMM - can you post a picture, I am really having a hard time believing a 2HP 24V motor fits in your hand.
 
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