Re: (ET) OSMC

[Bfayette aol com]

I hadn't thought about sep-ex, but they do have a smaller module called 
Scorpion.  Maybe you could use one of those in conjunction with the OSMC 
for sep-ex.

I like the idea of a 4-pole controller.  That would give you the kind of 
control you would really like and expect from a ET. I expect to blow a few 
FETs along the way, but I think it will work.  

They use the fan to minimize size and weight. I have an idea for attaching 
Al "flags" to the FETs and use that in conjuntion with the fan.  Chris, 
the proprietor of Robot-Power spoke with me at length about the ins and 
outs of these controllers.  Seems like a pretty knowledgeable and friendly 
guy.  He also suggested some methods of current limiting.

Regards,

Brad


In a message dated 4/7/2004 12:23:05 AM Eastern Daylight Time, reinharj 
frontiernet net writes:

> 
> 
> Hello again Brad,
> I just took a longer look at the website you listed, and it sounds like 
> the
> design might be capable of handling the electrak current - a Sep-Ex type
> controller would need to also handle the field weakening, etc.
> 
> I am surprised that the Open Source Design PC board does not place the 
> FET's
> around the perimeter of the board, to take potential advantage of large,
> spread out heat sink (like modern high power car stereo amplifiers, and 
> the
> golf Car motor controllers from AllTrax and other companies).
> 
> Fan cooling means you can't seal against the environment . . .
> 
> Thanks again for pointing out the website - I have a lot of reading to do
> :>)
> 
> John
> 
> 
> ----- Original Message ----- 
> From: <Bfayette aol com>
> To: <elec-trak cosmos phy tufts edu>
> Sent: Tuesday, April 06, 2004 10:30 PM
> Subject: (ET) OSMC
> 
> 
> > I got a Open Source Motor Controller kit to try out on my long in 
> > progress
> E14 project.  This is a 4 quadrant controller good for (they claim) 160A
> continuous. This was developed by and for battle-bot enthusists. I think 
> it
> will need some higher voltage FETs, and I will roll my own 
> PIC based driver.
> Has anyone else looked into this?
> >
> > http://www.robot-power.com/osmc_info/
> >
> >   Brad
> >
> > _______________________________________________
> > Elec-trak mailing list
> > Elec-trak cosmos phy tufts edu
> > https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak
> >

  Brad