AVR-Chat

Can you provide a link to this file?

Thomas Keller wrote:
>   For those pof you who may not know, Spave Vector Pulse Width
> Modulation is the premiere means of controlling the speed of AC
> induction motorts (specifically, three phase motors).  The primary
> reason for this is that they switch the power waveforms 33% less often,
> thereby inurring 33% fewer switching losses, which makes for a much more
> efficient speed control system, with less expensive components (less
> expensive, lower-spec switching devices, smaller or no heat sinks,
> etc.).
> 
>   The alogorithm used for SVPWM is, quite naturally, complex and
> difficult to understand, being based heavily on vector algebra.  I have
> located an example of a Space vectro control package for the AVR, at
> avrFreaks.net.  Unfortunately, in analyzing the code, it has become
> obvious that whomoever wrote the code is not a very good programmer (at
> least, with the AVR).  This brings into question the correctness of the
> algorithm they have coded, as well as the correctnes of the code itself.
> 
>   All this having been said, my question:  Has anyone out there ever
> coded and used SCPWM, and could either provide sample code, or would be
> willing to work wiht me to further analyze and "certify" the code I have
> found?  My math skills are not strong enough to code this myself (I
> know, I know, but I am being honest here), and I have need of the
> algorithm for a personal project (which I may turn into a D-I-Y article
> for "Home Shop Machinist Magazine" if it works out well).
> 
>    This project is in persuit of my personal dream of building a machine
> shop in which I can build a variety of different descriptions of steam
> engines, including scale models of classic steam locomotives,as well as
> usable modela of Tesla Boundary Layer Turbines, etc..  Please help me
> persue my dream?
> 
> 
> Tom Keller



-- 
erikc
--
"The kind of man who wants the government to adopt and enforce his
ideas is always the kind of man whose ideas are idiotic."
    -- H. L. Mencken