[ausev] DIY controller?

[m. edmund howse]

Of course fail safes have to be considered but simple as they are 
nothing is entirely safe. Asteroids don't have a preference as to who 
they land on.

marv

Erik wrote:
> There's certainly nothing wrong, but given that a number of failure 
> modes of a PWM'd DC motor controller are full on tires screeching 
> through a red light there is an element of danger. Nothing that 
> couldn't be designed out of course.
>  
> As I understand, fundamentally they really are quite simple but as the 
> old quote goes - In theory, theory and practice are the same thing, in 
> reality they are different. High currents and the induced 
> electromagnetic fields can cause strange things to happen that may be 
> difficult to troubleshoot and so on, but it's definitely been done 
> before. I remember running across one in my early EV research, it 
> certainly looked cool.
>
> Erik
> On Fri, Jun 13, 2008 at 5:17 PM, Brian Lasseter 
> <blasseter.cmpe01 at gtalumni.org <mailto:blasseter.cmpe01 at gtalumni.org>> 
> wrote:
>
>     On Fri, Jun 13, 2008 at 1:41 AM,  <evehicle4me at hischopsticks.org
>     <mailto:evehicle4me at hischopsticks.org>> wrote:
>     > Has anyone run across diy plans for a controller?  either from
>     scratch
>     > or for hacking up something?  With ecars it seems that you spend
>     money
>     > in multiples of $1,500.  It would be nice if there was some way to
>     > shrink the cost of parts.
>
>     http://www.cafeelectric.com/curtis/curtis.php
>
>     Otmar has some Curtis controller schematics online... but
>     realistically, with something as important as the controller, I prefer
>     to buy one.
>
>     You could just put a 100kw rated rheostat in the car to control the
>     motor too.  :-)
>
>
>     --
>     TTFN,
>     Brian "Lasso" Lasseter
>
>      · (512)736-1677 · AIM:digininja · ICQ:2238123 · MSN:azoreg ·
>     "No Sane man will dance." -Cicero (106-43 B.C.)
>
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