DC motor feedback methods and options

[dmta]

Hi all,

I am making a DC motor control board and want to add more than one motor feedback method to increase its usefulness. At the moment I have added the quadrature encoder option.

What are other popular methods ? Do people use stuff like 4-20mA current loops ?
What are other options that might be useful?

Regards

 

[ronv]

A little more complicated but back emf sensing is often used because there is no sensor needed.

 

[schmitt trigger]

Back EMF sensing would allow you to measure speed, while current sensing would allow you to measure load

 

[dmta]

Thank you ronv and schmitt trigger for your replies... they were very helpful !!!!!!!!!!!!!!!!

 

[alec_t]

Shaft angle/rotation rate indicators (e.g. Hall effect, reluctance, optical) providing non-quadrature output pulses might also be used.