Hi, I'm trying to do current regulation on a motor driven wagon running on a track.(adsbygoogle = window.adsbygoogle || []).push({});

Instead of having a closed loop servo where the feedback is the speed or position the regulation is to use current. I'm struggling a bit with the theory.

This is what I'm used to doing:

http://www.engin.umich.edu/group/ctm/examples/motor/motor.html

Look at 1. Transfer function.

Now, newton's law in this system is a 2nd order differential equation which can be solved.

I thought that I need a transfer function I/V which I was able to obtain:

Ok so I have the transfer function, which is good. My problem however is that I have no idea of how to solve this equation it looks like it is third order? I might be incorrect.Code (Text):

I(s) Js + b

----- = -----------------------

V (Js+b)(Ls+R)+K^2

Sure this could be done numerically but I would prefer an algebraic way as I need to determine the time constant!

Any help or input would be appreciated.

Edit:

wow that was stupid... just elminate (Js+b)/(Js+b) and then it can be solved...

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# Current regulation

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