Re: DC motor modeling

Aug 09, 2003 0 Replies


Can anybody help me in defining the transfer function(s, z) of a DC motor?


> I'm not referreing to a general FT(available in control books) but a the FT
> of a real motor I have.
>
>

Basic Motor is KV = omega + omega dot * Tau



in S notation X = 1 ---- ---------------- Y 1 + ST


Z transform is ! + e^-aT -------------- a(z - e^-aT)



T is Time constant of Motor (67% rise time with step input) V = Volts K proportionality constant



Rgds



Hugh


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