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Re: (ET) Controllers
- Subject: Re: (ET) Controllers
- From: "Christopher Meier" <mr23 mn rr com>
- Date: Thu, 2 May 2002 09:21:14 -0500
- References: <004601c1f192$ec114ac0$0e01a8c0 dev1> <002d01c1f1d7$ec777940$0401a8c0 fcc net>
- Sender: owner-elec-trak cosmos phy tufts edu
There is some information on this in the archive.
Search for postings by Rhett George (think spelling is correct).
----- Original Message -----
From: "SteveS" <ssawtelle fcc net>
To: <elec-trak cosmos phy tufts edu>
Sent: Thursday, May 02, 2002 7:50 AM
Subject: Re: (ET) Controllers
> This topic is of interest to me as part of the reason I wanted an
> is to learn more about electric vehicles. I have seen some pretty
> discussion in here about motors and controllers, so it seems we have some
> knowledgeable people around.
> OK, now that I've buttered you up....
> It would probably be of general interest if someone would take the time
> write up a bit about the various motors used in the ETs and their
> construction (series, compound, etc). Topics like how field weakening
> increases speed, etc. would also be good. If there is a good reference
> out there, let me know. I've read up in a couple books, but don't even
> enough to be dangerous yet. Thinking about it now, a good place to start
> would be real information on the the actual motors we are dealing with. I
> tried to get info from GE but they replied back that basically they had
> information to give out.
> I hate to see that battery power wasted in those big resistors..... (I
> go full speed).
> ----- Original Message -----
> From: "SolidTech" <SolidTech qwest net>
> To: "'Elec-Trak List'" <>
> Sent: Thursday, May 02, 2002 12:36 AM
> Subject: (ET) Controllers
> > OK... What really is the best way to have a controller operate? I've
> > looking back over some of the discussion and I see what appears to be
> > tradeoffs:
> > - PWM uses the available power most efficeintly (and a controller could
> > designed that used field weakening for the higher speeds)
> > - "Analog" control provides regen braking for those downhill grades
> > I've got a little experience building microcontroller (Intel) based
> > controllers, so I believe building one wouldn't be tooooooo difficult -
> > the basic approach is what I'm wondering about right now. It sounds
> > the larger EVs use series wound motors without separate connections for
> > field, so we can't just use one of their controllers without serious
> > compromise.
> > Thoughts?
> > - - joe
> > Joseph Rock
> > E-15 & MagnaTrac Hydro 5000 in Colorado