DC motor control

Macgman2000

HELP!!! Would someone please walk me through using the PID to control motor speed? I have tried to control motor speed using a single FET with tach feedback. What I am finding is when a load changes the speed revs up and sometimes will oscillate trying to adjust speed. I have read through some PID explanations but there is still a discontinuity between the theory and how to impliment it in the SX....I guess it's lack of experience working with this. I would appreicate any help!!!!!

BTW...my motor is a DC brushed motor size 540, speed range from 100rpm to 7,000rpm.



Best Regards,

Nick

PJMonty

Nick,

You're probably not going to get any replies with the current question you have posted. Your question boils down to something like this, "I don't understand this big complicated thing. Can someone take the time to teach me all about it?"

If you want people to help, you need to be specific. I suggest re-posting your question after trying to dertermine where your understanding of PID control goes off the tracks. For example, write a post explaining how you think the each of the three terms in PID (Proportional - Integral - Derivative) work and then ask if this is correct. You need to start with a concrete question that can be answered, as opposed to, "I want to learn how to speak Spanish. Can someone teach me?"

Thanks, PeterM

Macgman2000

Thanks for the suggestion. I found an app note and got it working, sorry for the post!!



Best Regards,

Nick