Measuring motor the change in current when theres resistance on the motor

Other Hardware Motors, Mechanics, Power and CNC
1

Hi, I am currently working on this project that requires to find out the change in current when there is a resistance applied to the motor. May I know if that is possible and how I can do so?

2

I'm not sure I see the problem. Measure the current without a load, then apply the load to the motor, then measure the current again.

Exact details of how to do this will depend on what sort of motor you are talking about, DC, AC, BLDC, stepper etc. and how the load/resistance is to be applied.

Steve

3

If you have specific motor in mind, provide full information on it (preferrably link to datasheet).

4

MarkT:
If you have specific motor in mind, provide full information on it (preferrably link to datasheet).

slipstick:
I'm not sure I see the problem. Measure the current without a load, then apply the load to the motor, then measure the current again.

Exact details of how to do this will depend on what sort of motor you are talking about, DC, AC, BLDC, stepper etc. and how the load/resistance is to be applied.

Steve

I am currently using a DC gearbox motor. The project that I am currently working on is that I want to measure the load that I apply on the motor through the change of voltage / current / resistance. However, I have no idea how to start.

5

Lets try again: If you have specific motor in mind, provide full information on it (preferrably link to datasheet).

Without any information about the specific motor all that can be said is "get a suitable current sensor".

6

Some motor driver chips such as the VNH2SP30 have a current feedback pin which allows the Arduino to easily measure the current being delivered to the motor.

This is available on shields such as the Sparkfun Monster Moto. (Although that shield has some unfortunate component values which may need to be modified for your specific use.)